Compact three-axis ring laser gyroscope

Details Compact three-axis ring laser gyroscope Compact three-axis ring laser gyroscope

1996-07-31

1998-05-26

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1968

Patent

active

057574901

ABSTRACT:
Compact triaxial multioscillator configurations are based upon frames of rhombic dodecahedron and truncated octahedral shapes as taught by U.S. Pat. No. 4,795,258. Three non-planar cavities, each comprising four intersecting bores, intersect within the frames. External Faraday rotator assemblies comprising reverse mirrors and associated permanent magnets in differing configurations eliminate the need for intracavity elements to obtain nonreciprocal splitting. In the rhombic dodecahedron-shaped frame, external Faraday rotator assemblies are fixed to three planar faces at each of which pairs of segments of each of the internal nonplanar cavities converge. In the truncated tetrahedral frame, a single external Faraday rotator assembly is fixed to the single planar face at which pairs of segments of the three nonplanar cavities converge in a pattern forming the apexes of a centered equilateral triangle. A cavity length control mirror is fixed to each of the other three block surfaces upon which pairs of segments of the three non-planar cavities converge.

REFERENCES:
patent: 3741657 (1973-06-01), Andringa
patent: 4246549 (1981-01-01), Carter et al.
patent: 4540284 (1985-09-01), Gauert et al.
patent: 4795258 (1989-01-01), Martin
patent: 5323228 (1994-06-01), Moody

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