Photosensor and output control therefor

Details Photosensor and output control therefor Photosensor and output control therefor

1983-10-17

1986-08-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

G01J 132

Patent

active

046058486

ABSTRACT:
A method of controlling an output of a photosensor which comprises a light emitting element and a light receiving element. The quantity of light emanating from the light emitting element is varied from a predetermined value. A quantity of light output from the light emitting element when the output level of the light receiving element has reached a predetermined value is detected. This specific light quantity is multiplied by a predetermined value larger than or smaller than 1 (one), thereby preparing a reference light quantity for the light receiving element.

REFERENCES:
patent: 4074128 (1978-02-01), Harris et al.
patent: 4097731 (1978-06-01), Krause et al.
patent: 4352013 (1982-09-01), Fasig et al.
patent: 4406996 (1983-09-01), Oka
patent: 4443695 (1984-04-01), Kitamura

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