公开(公告)号：EP0788596A1

公开(公告)日：1997-08-13

申请号：EP95937628.0

申请日：1995-10-26

申请人： Byk-Gardner USA

发明人： KEANE, Thomas, J. ,  COOK, Richard, A. ,  GAMBEL, David, R. ,  GANONG, Frederick, R. ,  KEANE, Thomas, M. ,  LADSON, Jack, A.

IPC分类号： G01J3 ,  G01N21

CPC分类号： G01J3/02 ,  G01J3/0218 ,  G01J3/0251 ,  G01J3/0272 ,  G01J3/0291 ,  G01J3/50 ,  G01J3/51 ,  G01J3/513 ,  G01J3/524 ,  G01N21/474

摘要： There is provided a portable, high precision color measuring device (22) for measurement of color of non-self-luminous objects. A spectral analyser (58) separates light reflected from an object (32) into spectral components and produces signals corresponding to the levels of spectral components of the reflected light. The device utilizes a dual beam (40, 44) reference system and an illumination homogenizing chamber (92) to negate the effect of instrument component variations and ensure high precision measurements at any instrument orientation. Also, the device optimizes its measurements by adjusting the gain level of each signal produced by the spectral analyzer with a programmable gain amplifier (84, 86). In addition, the device includes various features that compensate for variations in light source intensity and illumination, color temperature, displacement of the device during measurements, alteration of control button position, and adaptability to various optical geometries.