Laser gyroscope detector and path length control system

Details Laser gyroscope detector and path length control system Laser gyroscope detector and path length control system

1977-01-04

1978-08-22

McGraw, Vincent P.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

G01B 902, G01P 900

Patent

active

041085531

ABSTRACT:
A four frequency laser gyroscope system having parallel processing of path length control and detection signals. Two output signal beams each containing components of two of the four waves circulating in the laser cavity are shone upon separate detector diodes. The output signals from the diodes contain both high and low frequency components which are separated in a crossover circuit. The low frequency component is processed to control the optical path length while the high frequency component is processed to produce a digital signal representing the amount of rotation of the laser gyroscope cavity.

REFERENCES:
patent: 3431514 (1969-03-01), Oshman et al.
patent: 3854819 (1974-12-01), Andringa
patent: 3965440 (1976-06-01), Graves

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