Multi-oscillator ring laser gyroscope with improved stabilizatio

Details Multi-oscillator ring laser gyroscope with improved stabilizatio Multi-oscillator ring laser gyroscope with improved stabilizatio

1991-02-28

1992-03-17

Turner, Samuel

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01C 1966

Patent

active

050962973

ABSTRACT:
The gyroscope had a closed optical path (10) defined by four reflecting surfaces (11, 12, 13, 14). Counter-rotating beams of radiation circulating around the closed path are produced by a gaseous active lasing medium executed over a gain region (15) to produce a discharge in the gas. A reciprocal dispersion element (18) is located in the optical path and a solenoid (23) is wound around part of the gain region to produce a magnetic field over that region. One of the reflecting surfaces (14) is a partially transmitting mirror which passes a small proportion of the radiation incident upon it, and detectors (19, 20) detect radiation in each counter-rotating beams passing through the mirror (14). The alternating current components of the outputs of the detectors are used to control a control circuit (22) so as to control the magnetic field produced by the solenoid (23).

REFERENCES:
patent: 3862803 (1975-01-01), Yntema et al.
patent: 4213705 (1980-07-01), Sanders
patent: 4470701 (1984-09-01), Smith
patent: 4652132 (1987-03-01), Nelson et al.

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