公开(公告)号：US20230228690A1

公开(公告)日：2023-07-20

申请号：US18096553

申请日：2023-01-12

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han TSAI ,  Hiroshi TAKAHASHI ,  Joey McENERY

IPC: G01N21/88

CPC classification number: G01N21/8851 ,  G01N2021/8864 ,  G01N2021/8887

Abstract: Systems and methods here may be used for capturing and analyzing reflectance images of facets on a gemstone under particular lighting and camera setups to automatically generate a clarity grade and/or surface polish grade for the gemstone.

公开(公告)号：US20220178827A1

公开(公告)日：2022-06-09

申请号：US17683874

申请日：2022-03-01

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Hiroshi TAKAHASHI

IPC: G01N21/64 ,  G01N33/38 ,  G01N21/87

Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.

公开(公告)号：US20200096453A1

公开(公告)日：2020-03-26

申请号：US16697164

申请日：2019-11-26

Applicant: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)

Inventor： Hiroshi TAKAHASHI

IPC: G01N21/87 ,  G01N33/38 ,  G01N21/25

Abstract: Provided herein is an apparatus for assessing a color characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a sample gemstone to be assessed, a daylight-approximating light source to provide uniform illumination to the gemstone, an image capturing component, and a telecentric lens positioned to provide an image of the illuminated gemstone to the image capturing component. Also provided are methods of color analysis based on images collected using such an apparatus.

公开(公告)号：US20200064267A1

公开(公告)日：2020-02-27

申请号：US16666375

申请日：2019-10-28

Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)

Inventor： Hiroshi TAKAHASHI

IPC: G01N21/64 ,  G01N21/87 ,  G01N33/38

Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.

公开(公告)号：US20190137399A1

公开(公告)日：2019-05-09

申请号：US16133454

申请日：2018-09-17

Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)

Inventor： Hiroshi TAKAHASHI

IPC: G01N21/64 ,  G01N21/87 ,  G01N33/38

Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.