Color photodetector array

Details Color photodetector array Color photodetector array

2007-10-23

2007-10-23

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C348S277000, C348S280000, C356S416000, C356S419000

Reexamination Certificate

active

10804272

ABSTRACT:
A color sensor for measuring light from a light source and the method for fabricating the color sensor. The color sensor includes a plurality of photodetectors, a plurality of primary color filters and a trim filter. Each primary color filter includes a layer of material between the light source and a corresponding one of the photodetectors. Each primary color filter preferentially transmits light in a corresponding band of wavelengths about a characteristic wavelength. The trim filter is located between the light source and the photodetectors and includes a layer of material that preferentially attenuates light at a first trim wavelength between two of the characteristic wavelengths. In one embodiment, the trim filter further preferentially attenuates light at a second trim wavelength, the first wavelength being less than one of the characteristic wavelengths and the second wavelength being greater than that characteristic wavelength.

REFERENCES:
patent: 3996461 (1976-12-01), Sulzbach et al.
patent: 4547074 (1985-10-01), Hinoda et al.
patent: 5073008 (1991-12-01), Terashita et al.
patent: 5648653 (1997-07-01), Sakamoto et al.

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