Apparatus for detecting light receiving position

Details Apparatus for detecting light receiving position Apparatus for detecting light receiving position

1990-07-06

1991-09-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502082, H01J 4014

Patent

active

050497359

ABSTRACT:
The present invention provides an apparatus for detecting a light receiving position, comprising: a light receiving portion including M.times.N light receiving elements arranged along a straight line at a predetermined pitch; a plurality of M digital circuits each for outputting a detection signal when an added level of an input signal exceeds a predetermined level, the M.times.N light receiving elements being connected to the M digital circuits for N by N, respectively; a plurality of N analogue circuits each for outputting the added level of the input signal, the light receiving elements connected to the M digital circuits for N by N respectively being connected to the N analogue circuits by N, respectively; and a calculating means connected to the M digital circuits and the N analogue circuits, for calculating a light receiving position of beam light incident to the light receiving portion, on the basis of outputs from the digital circuits and the analogue circuits.

REFERENCES:
patent: 4926042 (1990-05-01), Naito et al.
patent: 4948967 (1990-08-01), Naito et al.

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