Abrégé

The presently disclosed subject matter concerns a method and system for detecting stresses in a diamond and, more particularly, determining the location, and optionally the magnitude, of at least one stress area therein, if any. The stress areas are detected by illuminating the diamond with a polarized light, wherein the diamond is immersed in an immersion medium having a refractive index substantially matching that of the diamond. The light that passes through the diamond, passes thereafter through a polarization analyzer, detected and analyzed to determine location of stress area, and optionally its orientation and/or magnitude.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses
• G01N 21/21 - Propriétés affectant la polarisation
• G01N 21/88 - Recherche de la présence de criques, de défauts ou de souillures

Abrégé

(c) determining the position of inclusions based on images of the inclusions in the images.

Classes IPC  ?

• G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c.-à-d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette

Abrégé

a system, operative to reduce the presence within said material, at least when the gemstone is disposed therein, of any substance other than inclusions, having a third refractive index.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses
• G01N 21/88 - Recherche de la présence de criques, de défauts ou de souillures

Abrégé

An apparatus for determining location of at least one inclusion in a gemstone having a first refractive index, comprising: a container adapted for containing a material having a second refractive index, a holder operative to support a gemstone in the material when the container contains the material; an illuminator positioned and adapted to illuminate said gemstone when disposed within said material in said container, with illumination at which said gemstone and said material have their respective first and second indices; a detector that detects illumination from the illuminated gemstone and said material and produces signals responsive thereto; a controller that receives the signals and is operative to determine a location of an inclusion in the gemstone based on the signals; and a system, operative to reduce the presence within said material, at least when the gemstone is disposed therein, of any substance other than inclusions, having a third refractive index.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses

Abrégé

An apparatus for determining location of at least one inclusion in a gemstone having a first refractive index, comprising: a container adapted for containing a material having a second refractive index, a holder operative to support a gemstone in the material when the container contains the material; an illuminator positioned and adapted to illuminate said gemstone when disposed within said material in said container, with illumination at which said gemstone and said material have their respective first and second indices; a detector that detects illumination from the illuminated gemstone and said material and produces signals responsive thereto; a controller that receives the signals and is operative to determine a location of an inclusion in the gemstone based on the signals; and a system, operative to reduce the presence within said material, at least when the gemstone is disposed therein, of any substance other than inclusions, having a third refractive index.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses

Abrégé

A method of determining the position of inclusions in a gemstone, comprising: (a) placing the gemstone within a material having a refractive index within 0.5, optionally 0.2 or 0.1, of that of the gemstone; (b) illuminating the gemstone and imaging the illuminated gemstone; and (c) determining the position of inclusions based on images of the inclusions in the images.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses

Abrégé

A method of determining the position of inclusions in a gemstone, comprising: (a) placing the gemstone within a material having a refractive index within 0.5, optionally 0.2 or 0.1, of that of the gemstone; (b) illuminating the gemstone and imaging the illuminated gemstone; and (c) determining the position of inclusions based on images of the inclusions in the images.

Classes IPC  ?

• G01N 21/87 - Analyse des pierres précieuses