G - Physics – 01 – C
Patent
G - Physics
01
C
345/10
G01C 19/66 (2006.01)
Patent
CA 1295721
APPARATUS AND METHOD FOR SENSING ROTATION RATE AND DIRECTION OF ROTATION AND FOR CONTROLLING CAVITY LENGTH A multioscillator ring laser gyroscope including a frame that encloses a closed optical path in which four circularly polarized optical waves propagate. A combining optics system combining the waves to produce an interference pattern. A pair of photodetectors placed in the interference pattern in half quadrature relative to the interference pattern so that the detectors produce oscillatory output signals that are in phase-quadrature with each other. Processing signals indicative of the beat signal in the interference pattern to determine the rotation rate, the direction of rotation and to provide a cavity length control signal.
570781
Hendow Sami T.
Martin Graham J.
Hendow Sami T.
Litton Systems Inc.
Macrae & Co.
Martin Graham J.
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