Optical characteristic measuring apparatus with correction for d

Details Optical characteristic measuring apparatus with correction for d Optical characteristic measuring apparatus with correction for d

1997-04-10

1998-11-03

Evans, F. L.

Optics: measuring and testing

By shade or color

250226, G01J 350

Patent

active

058317406

ABSTRACT:
A spectral colorimeter includes an integrating sphere light source for projecting a beam of illuminating light to a sample, a light intensity sensor for receiving light reflected from the sample, a spectral characteristic calculator for calculating a spectral characteristic of the sample based on light reception data. The calorimeter is provided with a positional displacement detector for detecting a positional displacement of an illuminated spot of the sample and a corrector for correcting a calculated spectral characteristic based on a detected positional displacement of the illuminated spot. The spectral characteristic of the sample can accurately be obtained irrespective of a distance variation.

REFERENCES:
patent: 4389118 (1983-06-01), Yuasa et al.
patent: 4707138 (1987-11-01), Coatney
patent: 5483339 (1996-01-01), Van Aken et al.
patent: 5576831 (1996-11-01), Nikoonahad et al.
patent: 5592294 (1997-01-01), Ota et al.
Yoshimitsu Nao (Sakata Inx Corp.), "Macbeth Remote On-Line Color Control System," Compertech, published Jul. 1992, pp. 28-30. (English Abstract).

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