Ring laser gyro

Details Ring laser gyro Ring laser gyro

1989-09-13

1994-09-13

Moskowitz, Nelson

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01B 902, G01C 1964

Patent

active

053473604

ABSTRACT:
A ring laser gyro uses means for shaping the gas flow, which inevitably develops as a result of a DC discharge, to optimize the effect of the Fresnel-Fizeau drag on the output signal of the gyro. In one embodiment, a sufficient component of the gain medium flow is provided to produce a substantially constant Fresnel-Fizeau component of the output signal even in the presence of variations of the discharge current. In another embodiment, a sufficient component of gain medium flow is provided to substantially eliminate the Fresnel-Fizeau component of the output signal at a predetermined level of discharge current.

REFERENCES:
patent: 3503005 (1970-03-01), Olocker
patent: 3642373 (1972-02-01), Cathern
patent: 3744908 (1973-07-01), Podgorski
patent: 4325033 (1982-04-01), Shutt
patent: 4397027 (1983-08-01), Zampiello et al.
patent: 4470701 (1984-09-01), Smith
patent: 4481635 (1984-11-01), Broberg et al.
patent: 4653919 (1987-03-01), Stjern et al.
patent: 4667162 (1987-05-01), Broberg et al.
Smith et al.; "Ring Lasers: Principles and Applications"; '68-'69; pp. 38-42; Proc. Instr. Mech. Engrs., vol. 183 p. 130.
Podgorski et al., "Langmuir Flow Effects in the Laser Gyro", Jan. 1968, pp. 11-18, IEEE Jour. Quant. Elect., vol. QE-4, #1.
Optical Engineering/vol. 18 No. 4/Jul.-Aug. 1979"Dispersion and Gas Flow Effects in the Ring Laser Gyro" F. Aronowitz and W. L. Lim, pp. 376-380.

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