Color measurement systems and methods addressing effects of...

Details Color measurement systems and methods addressing effects of... Color measurement systems and methods addressing effects of...

2007-10-16

2010-11-09

Evans, F. L (Department: 2877)

Optics: measuring and testing

By shade or color

C356S421000

Reexamination Certificate

active

07830514

ABSTRACT:
Systems and methods are provided to address the potential impact of lighting conditions/light sources on color measurement and/or color matching, particularly as such light variation relates to UV levels. The systems and methods generally include a UV visualizer that is adapted to establish and/or compare UV profiles for individual substrates/samples, e.g., print materials, under various illuminating conditions. According to the disclosure, it is possible to determine both (i) how a sample (e.g., a printing material) responds to UV light, and (ii) the amount of UV light under which the sample is viewed without the need to measure the excitation pattern of the sample/paper or the spectra of the illuminating light. In this way, a true color reading and/or color match may be achieved. Color corrections may be implemented that necessarily address the level of color brightener, if any, in the substrate or paper to be printed upon.

REFERENCES:
patent: 6844931 (2005-01-01), Ehbets
patent: 2005/0219305 (2005-10-01), Kikuchi et al.
patent: 2006/0132777 (2006-06-01), Hubble, III et al.
patent: 2007/0086009 (2007-04-01), Ehbets
patent: 0769869 (1997-04-01), None
patent: 09 172551 (1997-06-01), None
Extended European Search Report dated Feb. 24, 2009.

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