Providing optical feedback on light color

Details Providing optical feedback on light color Providing optical feedback on light color

2007-05-01

2007-05-01

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

By shade or color

Tristimulus examination

C356S402000, C315S150000, C315S010000

Reexamination Certificate

active

10912394

ABSTRACT:
Optical feedback for controlling color of light from a light source is provided. Incident optical energy of the light is detected as a function of discrete steps of wavelength. For each discrete step of wavelength, an X, Y and Z tristimulus subvalue is produced. All the X, Y and Z tristimulus subvalues for all the discrete steps are summed together to produce an X, Y and Z tristimulus value for the light. The X, Y and Z tristimulus values are used as feedback in controlling color of the light generated by the light source.

REFERENCES:
patent: 4412744 (1983-11-01), Lee et al.
patent: 6344641 (2002-02-01), Blalock et al.
patent: 6448550 (2002-09-01), Nishimura
patent: 6507159 (2003-01-01), Muthu
patent: 6552495 (2003-04-01), Chang
patent: 6600562 (2003-07-01), Chang
patent: 7009343 (2006-03-01), Lim et al.

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