Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1982-12-13
1985-06-04
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
045211108
ABSTRACT:
A laser gyro having two cavities which are physically separated so that neither mode volumes have any common parts. Each cavity supports a wave traveling in only one direction either clockwise or counter-clockwise. Other waves, which are normally set up in a ring laser gyro, are prevented by a reversed feedback mirror. The gyro produces two waves whose frequencies are shifted in opposite directions by rotation. Lock-in is not possible. The two frequencies are mixed and the beat frequency is detected by optical heterodyne techniques. The response of this rotation sensor is linear down to zero rotation rate and its accuracy is limited by quantum effects.
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Honeycutt Thomas L.
Roberts Thomas G.
Bush Freddie M.
Gibson Robert P.
Lane Anthony T.
McGraw Vincent P.
The United States of America as represented by the Secretary of
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