Electro-optical feedback signal producing apparatus

Details Electro-optical feedback signal producing apparatus Electro-optical feedback signal producing apparatus

1975-10-08

1976-09-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250201, 250216, H01J 314

Patent

active

039821242

ABSTRACT:
Apparatus and circuitry for positioning a mirror at a desired position includes an electric to rotary motion transducer means connected with the mirror which is controlled by a signal obtained in response to an electrical positioning signal and a feedback signal derived from the actual mirror position. An electro-optical sensing means resonsive to the actual position of the mirror provides the feedback signal. The circuitry is automatically calibrated.

REFERENCES:
patent: 2766653 (1956-10-01), Martin et al.
patent: 3893129 (1975-07-01), Endo et al.
patent: 3919545 (1975-11-01), Schoon

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