Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, and said fifth lens has an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens having a low profile and a low F-number and allowing satisfactory correction of aberrations. An imaging lens comprises in order from an object side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power, wherein an image-side surface of said fourth lens L4 is convex in a paraxial region, an object-side surface of said fifth lens L5 is an aspheric surface having at least one inflection point, and the following conditional expressions are satisfied: There is provided an imaging lens having a low profile and a low F-number and allowing satisfactory correction of aberrations. An imaging lens comprises in order from an object side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power, wherein an image-side surface of said fourth lens L4 is convex in a paraxial region, an object-side surface of said fifth lens L5 is an aspheric surface having at least one inflection point, and the following conditional expressions are satisfied: f/Dep<2.0  (1) There is provided an imaging lens having a low profile and a low F-number and allowing satisfactory correction of aberrations. An imaging lens comprises in order from an object side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power, wherein an image-side surface of said fourth lens L4 is convex in a paraxial region, an object-side surface of said fifth lens L5 is an aspheric surface having at least one inflection point, and the following conditional expressions are satisfied: f/Dep<2.0  (1) 1.2

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

An imaging lens includes: arranged in order from an object side to an image side IM, a first lens L1 having positive refractive power; a second lens L2 having negative refractive power; a third lens L3 having positive refractive power; a fourth lens L4 having positive refractive power; a fifth lens L5; a sixth lens L6; a seventh lens L7 having negative refractive power; and an eighth lens L8 having negative refractive power, wherein an object-side surface of the sixth lens L6 is concave in a paraxial region, and an object-side surface of the eighth lens L8 is convex in the paraxial region.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said third lens has an image-side surface being convex in a paraxial region, and said fifth lens is formed in a biconcave shape having an object-side surface being concave and an image-side surface being concave in the paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said fifth lens is formed in a biconcave shape in a paraxial region, and said seventh lens is formed in a meniscus shape having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens has an object-side surface being concave in a paraxial region, said fourth lens has an image-side surface being concave in a paraxial region, and said sixth lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

An imaging lens includes: arranged in order from an object side to an image side, a first lens L1 having positive refractive power; a second lens L2 having negative refractive power; a third lens L3 having positive refractive power; a fourth lens L4 having negative refractive power; a fifth lens L5; a sixth lens L6; a seventh lens L7; and an eighth lens L8 having negative refractive power, wherein the eighth lens has an aspheric image-side surface having at least one inflection point, and a conditional expression below is satisfied: An imaging lens includes: arranged in order from an object side to an image side, a first lens L1 having positive refractive power; a second lens L2 having negative refractive power; a third lens L3 having positive refractive power; a fourth lens L4 having negative refractive power; a fifth lens L5; a sixth lens L6; a seventh lens L7; and an eighth lens L8 having negative refractive power, wherein the eighth lens has an aspheric image-side surface having at least one inflection point, and a conditional expression below is satisfied: −12.0

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power, wherein said fourth lens has an image-side surface being convex in a paraxial region, said seventh lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof

Abstract

Provided is an imaging lens unit that is able to suppress a reduction in optical performance even if plastic lenses absorb water. The imaging lens unit includes a lens barrel formed of a resin material and first to seventh plastic lenses housed in the lens barrel. Among the first to seventh plastic lenses, at least two adjacent plastic lenses have different water absorption rates and have conical fitting slopes that are centered on an optical axis, are formed outside optical effective portions of the adjacent plastic lenses, and are fittable to each other. The fitting slope of a high-water-absorption plastic lens that has a high water absorption rate is formed outside the fitting slope of a low-water-absorption plastic lens that has a low water absorption rate.

IPC Classes  ?

• G03B 17/12 - Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said second lens has an image-side surface being convex in a paraxial region, said third lens has an object-side surface being concave in a paraxial region, said fourth lens has an object-side surface being concave in a paraxial region, said sixth lens has an object-side surface being convex in a paraxial region, and said seventh lens has an image-side surface being concave in a paraxial region.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of low profile and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power having an object-side surface being convex in a paraxial region, a fourth lens having an object-side surface being convex in a paraxial region, a fifth lens with negative refractive power in a paraxial region, and a sixth lens with positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with positive refractive power, a fifth lens, and a sixth lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with positive or negative refractive power, a third lens with positive or negative refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said third lens has an object-side surface being convex in a paraxial region, said fifth lens is formed in a biconcave shape having an object-side surface and an image-side surface being concave in a paraxial region, and said seventh lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and has excellent optical characteristics. An imaging lens comprises in order from an object side to an image side, a first lens having a convex surface facing the object side near an optical axis and positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having a concave surface facing the image side near the optical axis and negative refractive power, wherein an image-side surface of said seventh lens is formed as an aspheric surface having at least one pole point in a position off the optical axis, said second lens has positive refractive power near the optical axis, and said sixth lens has plane surfaces both on the object side and the image side and is formed as a double-sided aspheric lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive refractive power in a paraxial region, a fifth lens having aspheric surfaces on both sides, and a sixth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens, a fifth lens with positive refractive power, a sixth lens with positive or negative refractive power, and a seventh lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an image-side surface being concave in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and said seventh lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and the predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and the predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side: a first lens with positive refractive power formed in a biconvex shape having an object-side surface being convex in a paraxial region; a second lens with negative refractive power having an object-side surface being convex in a paraxial region; a third lens with positive refractive power having an image-side surface being concave in a paraxial region; a fourth lens with positive refractive power in a paraxial region; and a fifth lens with negative refractive power having an object-side surface being concave in a paraxial region; and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region; a second lens with negative refractive power having an object-side surface being convex in a paraxial region; a third lens with negative refractive power having an object-side surface being concave in a paraxial region; a fourth lens with negative refractive power in a paraxial region; and a fifth lens with positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens, a fifth lens with positive refractive power, a sixth lens with positive or negative refractive power, and a seventh lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an image-side surface being concave in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and said seventh lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with positive refractive power having an object-side surface being concave in a paraxial region, and a fourth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/34 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having four components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive refractive power in a paraxial region, a fifth lens having aspheric surfaces on both sides, and a sixth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having negative refractive power; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape having an inflection point.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with negative refractive power in a paraxial region, a second lens with positive refractive power having a convex object-side surface in a paraxial region, a third lens with positive refractive power in a paraxial region, a fourth lens, a fifth lens having a concave object-side surface in a paraxial region, and a sixth lens having a concave image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of low profile and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with positive or negative refractive power in a paraxial region, a fourth lens with negative refractive power in a paraxial region, and a fifth lens with positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power having a concave image-side surface in a paraxial region, a third lens having a convex object-side surface in a paraxial region, a fourth lens having a convex image-side surface in a paraxial region, a fifth lens having a convex object-side surface in a paraxial region, and a sixth lens having a concave image-side surface in a paraxial region, wherein three out of four lenses from the third lens to the sixth lens have positive refractive power or negative refractive power in the paraxial region, and one out of four lenses is formed in a meniscus shape, substantially has no refractive power in the paraxial region, and has aspheric surfaces on both sides, and a predetermined conditional expression is satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens, a sixth lens having an image-side surface being concave in a paraxial region, and a seventh lens with negative refractive power having an image-side surface being concave in a paraxial region, wherein the image-side surface of the seventh lens is an aspheric surface having at least one pole point in a position off the optical axis, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having a convex surface facing the object side near an optical axis, a second lens, a third lens having negative refractive power near the optical axis, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having a concave surface facing the image side and the negative refractive power near the optical axis, wherein an image-side surface of said eighth lens is formed as an aspheric surface having at least one pole point in a position off the optical axis, said sixth lens has positive refractive power near the optical axis, an object-side surface of said seventh lens is a convex surface facing the object side near the optical axis, and a below conditional expression (1) is satisfied: There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having a convex surface facing the object side near an optical axis, a second lens, a third lens having negative refractive power near the optical axis, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having a concave surface facing the image side and the negative refractive power near the optical axis, wherein an image-side surface of said eighth lens is formed as an aspheric surface having at least one pole point in a position off the optical axis, said sixth lens has positive refractive power near the optical axis, an object-side surface of said seventh lens is a convex surface facing the object side near the optical axis, and a below conditional expression (1) is satisfied: 0.15<νd7/νd8<0.55 where νd7: an abbe number at d-ray of the seventh lens, νd8: an abbe number at d-ray of the eighth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of the wide field of view, the low-profileness and the low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens having a convex surface facing the object side and positive refractive power near an optical axis, a second lens having negative refractive power near the optical axis, a third lens having aspheric surfaces on both sides, a fourth lens, and a fifth lens having a concave surface facing the image side and the negative refractive power near the optical axis, wherein an image-side surface of said fifth lens is formed as an aspheric surface having at least one pole point in a position off the optical axis, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having positive refractive power and a convex surface facing the object side near the optical axis, a second lens having negative refractive power near the optical axis, a third lens having the positive refractive power near the optical axis, a fourth lens, and a fifth lens having the negative refractive power and a concave surface facing the image side near the optical axis, wherein the image-side surface of said fifth lens is formed as an aspheric surface having at least one off-axial pole point, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with negative refractive power having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with the negative refractive power in a paraxial region, a fourth lens with the positive refractive power in a paraxial region, a fifth lens having a flat object-side surface and a flat image-side surface that are aspheric, and a sixth lens with the negative refractive power having an image-side surface being concave in a paraxial region.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape having an inflection point.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with small telephoto ratio and excellent optical characteristics which satisfies demand of the downsizing, the low-profileness and the low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens being a double-sided aspheric lens, and a sixth lens having a convex surface facing the image side, and a below conditional expression is satisfied: There is provided an imaging lens with small telephoto ratio and excellent optical characteristics which satisfies demand of the downsizing, the low-profileness and the low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens being a double-sided aspheric lens, and a sixth lens having a convex surface facing the image side, and a below conditional expression is satisfied: 0.60

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 5/225 - Television cameras

Abstract

f4: a focal length of the fourth lens.

IPC Classes  ?

• G02B 13/02 - Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens, an aperture stop, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in the paraxial region, a fourth lens, a fifth lens with the positive refractive power in the paraxial region, a sixth lens being a double-sided aspheric lens, and a seventh lens with negative refractive power having an image-side surface being concave in the paraxial region and an aspheric surface having at least one pole point in a position off the optical axis.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a wide field of view, a low profile and a low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power in a paraxial region, a second lens, a third lens having an image-side surface being convex in the paraxial region, a fourth lens, a fifth lens with negative refractive power in the paraxial region, a sixth lens with positive refractive power in the paraxial region, and a seventh lens with negative refractive power having an image-side surface that is concave in the paraxial region and is formed as an aspheric surface having at least one pole point in a position off the optical axis.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with small telephoto ratio and excellent optical characteristics which satisfies demand of the downsizing, the low-profileness and the low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens being a double-sided aspheric lens, and a sixth lens having a convex surface facing the image side, and a below conditional expression is satisfied: There is provided an imaging lens with small telephoto ratio and excellent optical characteristics which satisfies demand of the downsizing, the low-profileness and the low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens being a double-sided aspheric lens, and a sixth lens having a convex surface facing the image side, and a below conditional expression is satisfied: 0.60

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 5/225 - Television cameras

Abstract

An imaging lens comprises five optical elements, in order from an object side to an image side, comprising, a first lens as a first optical element having positive refractive power, a second lens as a second optical element having negative refractive power and a convex surface facing the object side near an optical axis, a third lens as a third optical element having the refractive power, and a fourth lens as a fourth optical element having refractive power and the convex surface facing the object surface near the optical axis, wherein and an aberration correction optical element as a fifth optical element are arranged between said third lens and said fourth lens, said aberration correction optical element has both flat surfaces near the optical axis and aspheric surfaces.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
• G02B 13/02 - Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length
• G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of low profile and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power having an object-side surface being convex in a paraxial region, a fourth lens having an object-side surface being convex in a paraxial region, a fifth lens with negative refractive power in a paraxial region, and a sixth lens with positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and has excellent optical characteristics. An imaging lens comprises in order from an object side to an image side, a first lens having a convex surface facing the object side near an optical axis and positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having a concave surface facing the image side near the optical axis and negative refractive power, wherein an image-side surface of said seventh lens is formed as an aspheric surface having at least one pole point in a position off the optical axis, said second lens has positive refractive power near the optical axis, and said sixth lens has plane surfaces both on the object side and the image side and is formed as a double-sided aspheric lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive or negative refractive power in a paraxial region, a fifth lens, a sixth lens with positive refractive power in a paraxial region, and a seventh lens with negative refractive power having a concave image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided a compact imaging lens configured to properly correct aberrations. The imaging lens includes, in order from an object side to an image side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5, a sixth lens L6, a seventh lens L7 with positive refractive power, and an eighth lens L8 with negative refractive power. D34: a distance along the optical axis between the third lens and the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with positive refractive power in a paraxial region, a fourth lens, a fifth lens with negative refractive power in a paraxial region, a sixth lens with positive refractive power having a convex object-side surface in a paraxial region, and a seventh lens with negative refractive power having a concave image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive or negative refractive power in a paraxial region, a second lens with positive or negative refractive power in a paraxial region, a third lens with positive refractive power in a paraxial region, a fourth lens with negative refractive power in a paraxial region, a fifth lens with positive refractive power in a paraxial region, a sixth lens with positive refractive power in a paraxial region, and a seventh lens with negative refractive power.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 3/02 - Simple or compound lenses with non-spherical faces
• G02B 3/04 - Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere
• G02B 5/00 - Optical elements other than lenses

Abstract

There is provided an imaging lens with excellent optical characteristics while satisfying demand of low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power formed in a biconvex shape having an object-side surface and an image-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with the negative refractive power in a paraxial region, a fourth lens with the negative refractive power in a paraxial region, and a fifth lens with the positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• H04N 23/54 - Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive or negative refractive power having an object-side surface being convex in a paraxial region, a fifth lens with positive or negative refractive power in a paraxial region, and a sixth lens with positive or negative refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 3/04 - Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape having an inflection point.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 15/14 - Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having negative refractive power; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape having an inflection point.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 15/14 - Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective

Abstract

An object is to provide an optical element and an imaging lens that reproduce clear images by restraining ghosting, flare, and/or similar occurrences caused by unwanted light reflected by the outer circumference surface of an edge of the optical element. An optical element 100 includes an optical effective portion 101 and an edge 102. The edge 102 is located around the optical effective portion 101 and has an outer circumference surface 103. The outer circumference surface 103 includes roughened portions 200. An imaging lens uses the optical element 100.

IPC Classes  ?

• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having positive refractive power and a convex surface facing the object side near the optical axis, a second lens having negative refractive power near the optical axis, a third lens having the positive refractive power near the optical axis, a fourth lens, and a fifth lens having the negative refractive power and a concave surface facing the image side near the optical axis, wherein the image-side surface of said fifth lens is formed as an aspheric surface having at least one off-axial pole point, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens, a sixth lens having an image-side surface being concave in a paraxial region, and a seventh lens with negative refractive power having an image-side surface being concave in a paraxial region, wherein the image-side surface of the seventh lens is an aspheric surface having at least one pole point in a position off the optical axis, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens which uses a larger number of constituent lenses for higher performance and features compactness and a wide field of view. The imaging lens is composed of seven lenses to form an image of an object on a solid-state image sensor. The constituent lenses are arranged in the following order from an object side to an image side: a first lens with positive refractive power; a second lens with positive or negative refractive power; a third lens with negative refractive power; a fourth lens with positive or negative refractive power as a double-sided aspheric lens; a meniscus fifth lens having a convex surface on the image side; a sixth lens with positive or negative refractive power as a double-sided aspheric lens; and a seventh lens with negative refractive power, in which an air gap is provided between lenses.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G06T 5/00 - Image enhancement or restoration
• G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive refractive power in a paraxial region, and a fifth lens with negative refractive power having a convex image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The eighth lens has at least one aspheric surface. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens is formed in the shape so that the surface thereof on the image plane side has a specific paraxial curvature radius.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The eighth lens has at least one aspheric surface. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens is formed in the shape so that the surface thereof on the image plane side has a specific paraxial curvature radius.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens having negative refractive power, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The first lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens having positive refractive power; a sixth lens; a seventh lens; an eighth lens; and a ninth lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The first lens has at least one aspheric surface. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens has a specific focal length.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The first lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens having positive refractive power; and a ninth lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The eighth lens has at least one aspheric surface. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The seventh lens has a specific thickness near an optical axis thereof. The eighth lens has a specific thickness near an optical axis thereof.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens having positive refractive power; and a ninth lens, arranged in this order from an object side an image plane side. The imaging lens has a total of nine lenses. The first lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens having positive refractive power; an eighth lens; and a ninth lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of nine lenses. The eighth lens is formed in a shape so that a surface thereof on the object side has an aspherical shape. The ninth lens is formed in a shape so that a surface thereof on the image plane side has an aspherical shape.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with negative refractive power having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with the negative refractive power in a paraxial region, a fourth lens with the positive refractive power in a paraxial region, a fifth lens having a flat object-side surface and a flat image-side surface that are aspheric, and a sixth lens with the negative refractive power having an image-side surface being concave in a paraxial region.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided an imaging lens with excellent optical characteristics while satisfying demand of wide field of view. An imaging lens comprises, in order from an object side to an image side, a first lens with negative refractive power in a paraxial region, a second lens with positive or negative refractive power having an object-side surface being concave in a paraxial region, a third lens with positive refractive power having a biconvex shape with convex surfaces on the object side and the image side in a paraxial region, and a fourth lens with positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/34 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having four components only
• H04N 5/225 - Television cameras
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"

Abstract

There is provided an imaging lens with high-resolution which satisfies demand of the wide field of view, the low-profileness and the low F-number, and excellently corrects aberrations. An imaging lens comprises in order from an object side to an image side, a first lens having positive refractive power and a convex surface facing the object side near the optical axis, a second lens having negative refractive power near the optical axis, a third lens, a fourth lens, a fifth lens and a sixth lens having negative refractive power and a concave surface facing the image side near the optical axis, wherein the image-side surface of said sixth lens is formed as an aspheric surface having at least one off-axial pole point, the image-side surface of said first lens has the concave surface facing the image side near the optical axis, the image-side surface of said third lens has the concave surface facing the image side near the optical axis, said fifth lens has a biconvex shape having the convex surfaces facing the object side and the image side near the optical axis, the object-side surface of the sixth lens has the convex surface facing the object side near the optical axis, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided a compact imaging lens configured to properly correct aberrations. The imaging lens includes, in order from an object side to an image side, a first lens L1 having negative refractive power, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 having negative refractive power. The eighth lens L8 has an aspheric image-side surface having at least one inflection point.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof

Abstract

f4: a focal length of the fourth lens.

IPC Classes  ?

• G02B 13/02 - Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• H04N 5/225 - Television cameras
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided a compact imaging lens configured to properly correct aberrations. The imaging lens includes, in order from an object side to an image side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5, a sixth lens L6, a seventh lens L7 with positive refractive power, and an eighth lens L8 with negative refractive power. D34: a distance along the optical axis between the third lens and the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens, and a fifth lens having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with positive refractive power in a paraxial region, a fourth lens, a fifth lens with negative refractive power in a paraxial region, a sixth lens with positive refractive power having a convex object-side surface in a paraxial region, and a seventh lens with negative refractive power having a concave image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power having an image-side surface being concave in a paraxial region, a fourth lens with positive refractive power in a paraxial region, and a fifth lens with negative refractive power having an object-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

There is provided an imaging lens with excellent optical characteristics while satisfying demand of low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power formed in a biconvex shape having an object-side surface and an image-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with the negative refractive power in a paraxial region, a fourth lens with the negative refractive power in a paraxial region, and a fifth lens with the positive refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• H04N 5/225 - Television cameras

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive or negative refractive power in a paraxial region, a second lens with positive or negative refractive power in a paraxial region, a third lens with positive refractive power in a paraxial region, a fourth lens with negative refractive power in a paraxial region, a fifth lens with positive refractive power in a paraxial region, a sixth lens with positive refractive power in a paraxial region, and a seventh lens with negative refractive power.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 5/00 - Optical elements other than lenses
• G02B 3/04 - Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere
• G02B 3/02 - Simple or compound lenses with non-spherical faces

Abstract

An imaging lens includes a first lens; a second lens; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens has at least one aspheric surface. The fifth lens has two aspheric surfaces. The sixth lens is formed in a shape so that a surface thereof on the object side is convex at a paraxial region thereof and a surface thereof on the image plane side is concave at a paraxial region thereof. The seventh lens has two aspheric surfaces.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 9/12 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 5/00 - Optical elements other than lenses
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

An imaging lens includes a first lens; a second lens; a third lens having negative refractive power; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a surface thereof on the image plane side is concave at a paraxial region thereof. The seventh lens is formed in a shape so that a surface thereof on the image plane side is aspheric. The first lens and the second lens have a specific composite focal length. The third lens have a specific focal length.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 9/12 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 5/00 - Optical elements other than lenses
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

t3: distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided a compact and high-resolution imaging lens at a low cost. t3: distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

An imaging lens includes a first lens; a second lens; a third lens having negative refractive power; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens is formed in a meniscus shape at a paraxial region thereof. The sixth lens is formed in a shape so that a surface thereof on the object side is convex at a paraxial region thereof. The fourth lens and the fifth lens have a specific composite focal length. The sixth lens and the seventh lens have a specific composite focal length.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 9/12 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 5/00 - Optical elements other than lenses
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided a compact and high-resolution imaging lens at a low cost. t3: distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a surface thereof on the image plane side is concave at a paraxial region thereof. The seventh lens is formed in a shape so that a surface thereof on the image plane side is aspheric. The first lens and the second lens have a specific composite focal length. The third lens have a specific focal length. The fourth lens and the fifth lens have a specific composite focal length. The sixth lens and the seventh lens have a specific composite focal length.

IPC Classes  ?

• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components
• G02B 9/12 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having three components only
• G02B 13/18 - Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 5/00 - Optical elements other than lenses
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprising in order from an object side to an image side, a first lens with positive refractive power having a convex object-side surface in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive or negative refractive power in a paraxial region, a fifth lens, a sixth lens with positive refractive power in a paraxial region, and a seventh lens with negative refractive power having a concave image-side surface in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive or negative refractive power having an object-side surface being convex in a paraxial region, a fifth lens with positive or negative refractive power in a paraxial region, and a sixth lens with positive or negative refractive power having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 3/04 - Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low profile and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens, an aperture stop, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in the paraxial region, a fourth lens, a fifth lens with the positive refractive power in the paraxial region, a sixth lens being a double-sided aspheric lens, and a seventh lens with negative refractive power having an image-side surface being concave in the paraxial region and an aspheric surface having at least one pole point in a position off the optical axis.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided a compact imaging lens configured to properly correct aberrations. The imaging lens includes, in order from an object side to an image side, a first lens L1 having negative refractive power, a second lens L2 having positive refractive power, a third lens L3 having negative refractive power, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 having negative refractive power. The eighth lens L8 has an aspheric image-side surface having at least one inflection point.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a wide field of view, a low profile and a low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power in a paraxial region, a second lens, a third lens having an image-side surface being convex in the paraxial region, a fourth lens, a fifth lens with negative refractive power in the paraxial region, a sixth lens with positive refractive power in the paraxial region, and a seventh lens with negative refractive power having an image-side surface that is concave in the paraxial region and is formed as an aspheric surface having at least one pole point in a position off the optical axis.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided an imaging lens with high resolution which satisfies in well balance wide field of view, low-profileness and low F-number and properly corrects aberrations. An imaging lens comprises a first lens having negative refractive power, a second lens having the negative refractive power, a third lens, a fourth lens having the negative refractive power and a convex surface facing the image side near an optical axis, a fifth lens having at least one aspheric surface, and a sixth lens being double-sided aspheric lens and having a concave surface facing the image side near the optical axis, wherein the image-side surface of the sixth lens is an aspheric surface changing to the convex surface at a peripheral area.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof

Abstract

TTL: distance along the optical axis from an object-side surface of the first lens to an image plane.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/60 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having five components only

Abstract

There is provided a compact and high-resolution imaging lens at a low cost. t3: distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

There is provided a compact and high-resolution imaging lens at a low cost. t3: distance along the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens.

IPC Classes  ?

• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 9/64 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having more than six components

Abstract

An imaging lens includes a first lens having negative refractive power; an aperture stop; a second lens; a third lens; a fourth lens having negative refractive power; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the object side is convex at a paraxial region thereof. The sixth lens is formed in a meniscus shape at a paraxial region thereof. The first lens and the sixth lens have specific Abbe's numbers.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens having negative refractive power; an aperture stop; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fourth lens is formed in a meniscus shape at a paraxial region thereof. The fifth lens is formed in a shape so that a surface thereof on the object side is convex at a paraxial region thereof. The sixth lens is formed in a meniscus shape at a paraxial region thereof. The first lens and the sixth lens have specific Abbe's numbers.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below

Abstract

An imaging lens includes a first lens having negative refractive power; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The first lens is formed in a shape so that a surface thereof on the image side has an aspheric shape. The fourth lens is formed in a shape so that a surface thereof on the image plane side has an aspheric shape. The fifth lens is formed in a shape so that a surface thereof on the image plane side is concave at a paraxial region thereof, and has an aspheric shape having an inflection point. The sixth lens has a specific Abbe's number ν6. The first lens and the fifth lens are disposed away from the second lens and the sixth lens, respectively, by specific distances.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"

Abstract

An imaging lens includes a first lens having negative refractive power; an aperture stop; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the image plane side is concave at a paraxial region thereof. The fifth lens is formed in the shape so that the surface thereof on the image plane side has an aspheric shape having an inflection point. The first lens has a specific Abbe's number ν1. The first lens is disposed away from the second lens by a specific distance. The fifth lens is disposed away from the sixth lens by a specific distance.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"

Abstract

An imaging lens includes a first lens having negative refractive power; an aperture stop; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The fourth lens is formed in a shape so that a surface thereof on the image plane side is convex at a paraxial region thereof and has an aspheric shape having an inflection point. The fifth lens is formed in a shape so that a surface thereof on the image plane side is concave at a paraxial region thereof.

IPC Classes  ?

• G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
• G02B 13/00 - Optical objectives specially designed for the purposes specified below
• G02B 13/06 - Panoramic objectivesSo-called "sky lenses"