Background light compensation for sensor array

Details Background light compensation for sensor array Background light compensation for sensor array

1991-12-24

1993-04-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502033, 25023118, 250237G, G01J 4014

Patent

active

052045188

ABSTRACT:
A position detector for a scanning beam comprising a plurality of rows of spaced apart sensors. Each row of sensors includes a plurality of logic zero sensors and a plurality of logic one sensors which are arranged in alternating logic order. Each row is arranged such that it is symmetrical about its center. Equal areas of logic zero sensors on each side of the center are equal distances away from the center and equal areas of logic one sensors on each side of the center are equal distances away from the center to substantially cancel out any background light effects on the sensors.

REFERENCES:
patent: 3599004 (1971-08-01), Grendelmeier
patent: 4769546 (1988-09-01), Kniffler et al.
patent: 4857721 (1989-08-01), Dunavan et al.
patent: 4982081 (1991-01-01), Schmidt

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