An optical module having an object side and an image side; the module comprising, from the object side to the image side: a first positive meniscus lens having a convergence C1, made of a material having a refractive index Nd1 and an Abbc number Vd1, a second negative meniscus lens having a convergence C2 made of a material having a refractive index Nd2 and an Abbc number Vd2, a third positive meniscus lens, having a convergence C3, made of a material having a refractive index Nd3 and an Abbc number Vd3, a fourth negative lens having a convergence C4, made of a material having a refractive index Nd4 and an Abbc number Vd4, wherein: 1.1≤C1/C≤ 1.35 II C1/C2 II ≥ 2 0.5≤ C1/C3≤ 1.1 Cl/Vd1≤< 5.2 II C2/Vd2 II ≤ 7 II∑ (Ci/Vdi )II < 4 with i = 1 to 4.
G02B 9/34 - Objectifs optiques caractérisés à la fois par le nombre de leurs composants et la façon dont ceux-ci sont disposés selon leur signe, c.-à-d. + ou — ayant uniquement quatre composants
An optical module (10) comprises a positive meniscus lens (16) having a focal length F1 and comprising a first convex optical surface (12) and a second concave optical surface (20), and a plano-convex lens (22) having a focal length F1 and comprising a third flat optical surface (24) and a fourth convex optical surface (26) from an object side (12) to an image side (14). The curvatures of the four optical surfaces (12, 20, 24, 26) are defined by the equation: Zi=CURViYi2/(l+(l+Ki)CURVi2Yi2)1/2)+(Ai)Yi2+(Bi)Yi4+(Ci)Yi6+(Di)Yi8, and the two lenses are defined by 0.35
G02B 13/00 - Objectifs optiques spécialement conçus pour les emplois spécifiés ci-dessous
G02B 9/04 - Objectifs optiques caractérisés à la fois par le nombre de leurs composants et la façon dont ceux-ci sont disposés selon leur signe, c.-à-d. + ou — ayant uniquement deux composants
G02B 11/02 - Objectifs optiques caractérisés par le nombre total de lentilles simples et composées constituant l'objectif et par leur disposition ayant uniquement deux lentilles
3.
OPTICAL MODULE COMPRISING MONOCHROMATIC IMAGE SENSORS, SYSTEM COMPRISING OPTICAL MODULE AND METHOD OF MANUFACTURING OPTICAL MODULE
An optical module comprises: at least three monochromatic image sensors (46) each sensitive to a different wavelength; and lenses (30,50) as many as image sensors (46), each lens (30,50) being coupled to a distinct image sensor (46); wherein each lens (30,50) is provided to form an identical image of an object located in front of the optical module onto the image sensor (46) to which it is coupled. A system comprising the optical module and a method of manufacturing the optical module are also provided.
G03B 33/04 - Photographie en couleurs, autre que la simple exposition ou projection d'un film en couleurs au moyen de clichés de sélection quadrichrome ou à plus de couleurs
G02B 7/02 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour lentilles
G02B 27/10 - Systèmes divisant ou combinant des faisceaux
G02B 27/62 - Appareils optiques spécialement adaptés pour régler des éléments optiques pendant l'assemblage de systèmes optiques
G03B 29/00 - Combinaisons d'appareils photographiques, de projecteurs ou d'appareils de tirage photographique avec des appareils non photographiques et non optiques, p. ex. montres ou armesAppareils ayant la forme d'un autre objet
H04M 1/02 - Caractéristiques de structure des appareils téléphoniques
A lens module (10) for image capture comprises a first positive meniscus lens (16) having a focal length F1 and comprising a first convex optical surface (18) facing the object side (12), and a second concave optical surface (20) facing the image side (14), and a second positive meniscus lens (22) having a focal length F2 and comprising a third concave optical surface (24) facing the object side (12), and a fourth convex optical surface (26) facing the image side (14). The four surfaces follow the equations: Zi=CURVi Yi2/(1+(1-(1+Ki) CURVi2 Yi2)1/2)+(Ai) Yi2+(Bi) Yi4+(Ci) Yi6+(Di) Yi8 and Mi=1-(1+Ki)(CURVi)2(Ri)2 wherein: i is the surface number, Ki is the conic constant of the i-th surface, CURVi is the curvature of the i-th surface at the optical axis, Ai, Bi, Ci, and Di are aspheric coefficients of the i-th surface, and Ri is the effective radius of the aperture of the i-th surface. The following relations can be satisfied: 0.70
G02B 9/06 - Objectifs optiques caractérisés à la fois par le nombre de leurs composants et la façon dont ceux-ci sont disposés selon leur signe, c.-à-d. + ou — ayant uniquement deux composants deux composants +
G02B 13/18 - Objectifs optiques spécialement conçus pour les emplois spécifiés ci-dessous avec des lentilles ayant une ou plusieurs surfaces non sphériques, p. ex. pour réduire l'aberration géométrique
An optical module comprises: a first positive meniscus lens having a focal length F1 and comprising a first convex optical surface facing an object side, and a second concave optical surface facing an image side; a second positive meniscus lens having a focal length F2 and comprising a third concave optical surface facing the object side, and a fourth convex optical surface facing the image side. The four surfaces follow the curvature equation: Zi=CURViYi2/(1+(1-(1+Ki)CURVi2Yi2) 1/2)+(Ai)Yi2+(Bi)Yi4+(Ci)Yi6+(Di)Yi8 with Mi=1-(1+Ki)(CURVi) 2(Ri) 2 where: i is the surface number, Ki is the conic constant of the i-th surface; CURVi is the curvature of the i-th surface at the optical axis; Ai, Bi, Ci, Di, are aspheric coefficients of the i-th surface; Ri is the effective radius of aperture of the i-th surface. The following relations are satisfied: 0.60
G02B 9/06 - Objectifs optiques caractérisés à la fois par le nombre de leurs composants et la façon dont ceux-ci sont disposés selon leur signe, c.-à-d. + ou — ayant uniquement deux composants deux composants +
G02B 13/18 - Objectifs optiques spécialement conçus pour les emplois spécifiés ci-dessous avec des lentilles ayant une ou plusieurs surfaces non sphériques, p. ex. pour réduire l'aberration géométrique
6.
METHOD AND DEVICE FOR ALIGNING A LENS WITH AN OPTICAL SYSTEM
The invention comprises a process for pre-aligning a lens with an optical system, the process comprising: providing a lens and an optical system having an optical axis, wherein the lens is apt to be aligned with the optical system to form on an image plane an image of a source object, the image having top, bottom, left and right edges; coarsely positioning the lens with respect to the optical system; and in a plane normal to the optical axis of the optical system, correcting the position of the lens until the values of four Combination Modulation Transfer Functions (C- MTF) are in predetermined ranges, the C-MTF being calculated at four coarse measurement locations situated close to the edges of the image along two coarse positioning axes crossing the center of the image, each for a combination pattern comprising a combination of a Sagittal pattern and a Tangential pattern.
A two-part glass lens has a first portion (32) made out of a glass material of a first type and a second portion (38) made out of a glass material of a second type. The first portion of the lens has a first side (34) with a first optical surface of the lens. A first side (42) of the second portion of the lens is directly assembled on a second side (36) of the first portion of the lens. An array of lenses comprises at least two lenses as above. A method is used to form the lens or the array of lenses.
The present technology relates generally to the manufacturing of optical lenses used in the fabrication of optical modules, such as for miniature camera, as the camera used in mobile phones. More particularly, the present technology relates to devices and methods for manufacturing arrays of lenses.
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