Ring laser gyro dither pulse eliminator

Details Ring laser gyro dither pulse eliminator Ring laser gyro dither pulse eliminator

1980-07-14

1982-08-17

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

043447066

ABSTRACT:
A ring laser gyro is electromechanically oscillated so that oppositely moving light beams in the gyro do not exhibit an undesirable lock-in effect. A piezoelectric transducer mounted in the gyro measures the dither. Analog/digital circuitry converts the measurement to digital dither signals. A non-compensated beam combiner and photodetector assembly are integrally mounted to the gyro for producing beam frequency outputs from the light beams, indicative of inertial rotation of the gyro. The beat frequency outputs and dither signal are input to logic circuitry which eliminates the effect of the dither signal on the beam frequency output signals.

REFERENCES:
patent: 4248534 (1981-02-01), Elbert

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