Color filter array for area image sensors

Details Color filter array for area image sensors Color filter array for area image sensors

1989-02-02

1990-12-25

Arnold, Bruce Y.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

350166, 358331, G02B 522, G02B 528, H04N 979

Patent

active

049798030

ABSTRACT:
A color filter array for an area image sensor comprises a plurality of color filters formed on the sensor which selectively filter different colors of light. Each color filter includes a bottom semi-transparent partially reflected silver layer, a transparent, absorption free, dielectric layer formed on the bottom layer and having a thickness selected to correspond to wavelengths of light which are to pass into the image sensor, and a top semi-transparent partially reflected silver layer formed on the dielectric layer. The arrangement is that different colors of light selectively pass through the filter array into the corresponding potential wells of the area image sensor.

REFERENCES:
patent: 2769111 (1956-10-01), Sadowsky
patent: 3911479 (1975-10-01), Sakurai
patent: 4130347 (1978-12-01), Knop
patent: 4155627 (1979-05-01), Gale et al.
patent: 4258126 (1981-03-01), Heisinger
patent: 4522862 (1985-06-01), Bayer et al.
Murphy, SPIE, vol. 116, Solid State Imaging Devices, (1977), p. 33.

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