Laser gyroscope system

Details Laser gyroscope system Laser gyroscope system

1979-06-25

1981-08-18

Punter, William H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356350, G02F 109, G01B 902

Patent

active

042843294

ABSTRACT:
A four-frequency laser gyroscope system having improved accuracy is constructed using a single solid block of low thermal coefficient of expansion material. A four-segment nonplanar propagation path provides a first frequency splitting. A second splitting is provided by a Faraday rotator having a thin slab of rare earth-doped glass positioned within an aperture in a permanent magnet. A narrow angle of incidence is provided for the beams of incident upon the output mirror to prevent cross coupling between beams within the output optics structure. Blocking the gaseous flow path reduces output frequency drift caused by contamininating particles.

REFERENCES:
patent: 3245314 (1966-04-01), Dillon, Jr.
patent: 3436745 (1969-04-01), Knox
Houston, E. J., "Electricity & Magnetism," 2nd edition, McGraw Pub. Co., New York, 1899, pp. 139-140.
Polgreen, G. R., "New Applications of Modern Magnets", MacDonald, London, 1966, pp. 61-65.

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