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US 4,795,258 AGranted
Nonplanar three-axis ring laser gyro with shared mirror faces
AssigneeLitton Systems, Inc.
InventorGraham J. Martin
Life of this patent
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Abstract
A ring loser gyroscope for sensing rotations about three orthogonal axes. A frame includes and internal arrangement of three intersecting cavities, each of which is arranged for measuring rotation about one of the orthogonal axes. Each cavity comprises a non-planar arrangement of four cavity legs. A pair of anodes and a cathode cooperate with the intersecting cavities and, in one embodiment, with bypass tubes, whereby undesired Fresnel-Frizeau phase shifts are eliminated by gas flow effect cancellations.
Claims7
A ring laser gyroscope for measuring rotation about three mutually orthogonal axes comprising, in combination:
- (a) a three dimensional frame including a plurality of planar surfaces;
- (b) said frame comprising a block having three intersecting, closed non-planar cavities;
- (c) each of said cavities comprising four straight segments of equal lengths
- (d) a plurality of mirrors mounted upon predetermined surfaces of said frame for directing light about said cavities;
- and
- (e) said cavities and the surfaces of said frame are arranged so that said frame includes at least one mirror mounting surface for affixing one or more mirrors to direct light about at least two of said cavities.
3 more elements
Dependencies are inferred from the claim text.