Automatic shutter for low light sensing and amplifying device

Details Automatic shutter for low light sensing and amplifying device Automatic shutter for low light sensing and amplifying device

1990-04-23

1991-09-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250207, 2502011, H01J 3150, H01J 4014

Patent

active

050497308

ABSTRACT:
A low light sensing and amplifying device uses an automatically adjustable electro-optic shutter that quantitatively attenuates the amount of monitored electromagnetic energy impinging on a light processor in proportional relation to the electromagnetic energy's intensity. An output signal from the light processor controls the output of a power supply which provides an output supply signal to the electro-optic shutter.

REFERENCES:
patent: 3557373 (1971-01-01), Hess
patent: 4176919 (1979-12-01), Rast, Jr.
patent: 4314743 (1982-02-01), Rast
patent: 4695718 (1987-09-01), Dill
Motorola Technical Brochure, Motorola Inc. Components Division, "PLZT Eleo-Optic Devices SCS Solid Ceramic Shutters," 1987.
Motorola Technical Brochure, Motorola Inc. Components Division, "SCS 1108A Solid Ceramic Shutter," 1988.
Motorola Technical Brochure, Motorola Inc. Components Division, "PLZT Shutter, Model SCS 1108A Drive Application Note," 1988.

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