Phase-coded control for ring laser gyro

Details Phase-coded control for ring laser gyro Phase-coded control for ring laser gyro

1977-03-14

1978-07-11

McGraw, Vincent P.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

310317, 331 945S, G01B 902, G01P 900

Patent

active

040998762

ABSTRACT:
In a laser gyro, laser optics adjustment means comprising a mirror within the laser optics of the gyro and mounted upon a three-terminal duo-mode bimorph device for duo-mode modulation of the laser optics. A two-stage differential amplifier is responsively coupled to a source of two mutually phase-coded reference signals for separately dithering each mode of the duo-mode bimorph device, each stage being further responsive to a mutually exclusive one of a first and second synchronously detected photodetector output of the laser gyro whereby closed loop control of the laser optics is effected.

REFERENCES:
patent: 3555453 (1971-01-01), Littauer

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