Photoelectric transducing unit and system for detecting the shar

Details Photoelectric transducing unit and system for detecting the shar Photoelectric transducing unit and system for detecting the shar

1975-01-30

1977-04-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250201, 354 25, H01J 3912

Patent

active

040190498

ABSTRACT:
One bifilarly deposited photosensitive strip provided with electrodes on the ends, and a second bifilarly deposited photosensitive strip, contacted along its long edges by two electrodes, are disposed on opposite side of a transparent spacer to form a focusing indicator. When one or more indicators are mounted at suitable locations in an optical system, suitable circuit means respond to the electrical output at the electrodes and respond to the optical system position. Indication may be accomplished by responding to the circuit means.

REFERENCES:
patent: 3830571 (1974-08-01), Imai et al.
patent: 3838275 (1974-09-01), Stauffer
patent: 3857031 (1974-12-01), Sinclair et al.
patent: 3875401 (1975-04-01), Stauffer

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