Plurality of photodetectors, each having individually selected l

Details Plurality of photodetectors, each having individually selected l Plurality of photodetectors, each having individually selected l

1997-02-28

1999-01-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250216, 250239, 257432, G01J 100, H01L 310232

Patent

active

058594230

ABSTRACT:
A plurality of photo-detectors are provided wherein each photodetector includes a photosensitive semiconductor having a light-receiving face, a pair of leads electrically connected to the photosensitive semiconductor, and an individually selected light-transmitting member disposed in front of the light-receiving face of the photosensitive semiconductor. The light-transmitting member has a selected light transmittance which is individually selected from a plurality of different light-transmitting members to compensate for variations in the photosensitive semiconductor such that the photosensitive semiconductor provides an output current within a selected range upon a predetermined quantity of light incident upon the photo-detector. The light transmissive compensating member may be formed by selecting at least one of a mixture of materials, color, thickness, and surface finishing.

REFERENCES:
patent: Re35069 (1995-10-01), Hallenbeck et al.
patent: 3702402 (1972-11-01), Jacobs
patent: 4182977 (1980-01-01), Stricklin, Jr.
patent: 4309605 (1982-01-01), Okabe
patent: 5124549 (1992-06-01), Michaels et al.
patent: 5233178 (1993-08-01), Tokunaga
patent: 5289002 (1994-02-01), Tarn
patent: 5329131 (1994-07-01), Wijdenes et al.

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