Control system for oscillatory-mirror light beam deflector

Details Control system for oscillatory-mirror light beam deflector Control system for oscillatory-mirror light beam deflector

1993-06-16

1994-09-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358494, H01J 314

Patent

active

053471245

ABSTRACT:
A control system for controlling an oscillatory-mirror light beam deflector such as a resonant light beam deflector with a reflecting mirror, has a drive circuit for applying a drive signal to energize the oscillatory-mirror light beam deflector, and a detector for detecting a drive condition of the oscillatory-mirror light beam deflector and producing a drive condition signal indicative of the detected drive condition. A PID processor circuit, which is composed of a proportional circuit, an integrator, and a differentiator, generates an adjusting signal from the drive condition signal produced by the detector. The differentiator has a variable resistor for varying a feedback resistance thereof. A processor processes the drive condition signal with the adjusting signal thereby to produce the drive signal.

REFERENCES:
patent: 5081356 (1992-01-01), Horikawa
patent: 5138478 (1992-08-01), Ogawa

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