公开(公告)号：EP0805965A1

公开(公告)日：1997-11-12

申请号：EP96903621.0

申请日：1996-01-23

Applicant: UGTS, INC.

Inventor： VALENTE, Kevin, A. ,  REUTER, Ernest, R. ,  WAGNER, Randall, M.

IPC: G01J3 ,  G01N21

CPC classification number: G01J3/50 ,  G01J3/0251 ,  G01J3/504 ,  G01J3/51 ,  G01N21/87

Abstract: The invention relates to evaluation of gemstones and other transparent specimens and in particular to color grading of gemstones. The device utilizes a band pass filter (23) which transmits light through lenses (32) onto the detector array (31) to obtain the spectral response of a complete image. The gemstone is illuminated with annular light ring (22), which receives light from a light source (18) located in the right half compartment (14), in a way that provides for analysis of both reflected and transmitted light. The device utilizes multiple lighting angles to construct a composite image that is used to perform the grading of the gemstones.

公开(公告)号：EP0805965B1

公开(公告)日：2004-05-06

申请号：EP96903621.9

申请日：1996-01-23

Applicant: UGTS, INC.

Inventor： VALENTE, Kevin, A. ,  REUTER, Ernest, R. ,  WAGNER, Randall, M.

IPC: G01N19/02 ,  G01N21/00 ,  G01N21/25 ,  G01J3/40 ,  G01J3/28 ,  G01J3/46 ,  A44C17/00 ,  G01N21/87

CPC classification number: G01J3/50 ,  G01J3/0251 ,  G01J3/504 ,  G01J3/51 ,  G01N21/87