INTERFEROMETER GYRO USING HETERODYNE PHASE DETECTION

摘要

INTERFEROMETER GYRO USING HETERODYNE PHASE DETECTIONABSTRACT OF THE DISCLOSUREAn interferometer gyro includes a source of light which isdivided and introduced into a light path in counter-rotating directions.The light is removed from both counter-rotating directions after it hastraversed the path one time, and the removed beams combined with areference signal. The phase difference between the two combined signalsis determined to indicate the rotation of the optical path about whichthe light traversed. In one embodiment, the signal and reference signalsare modulated with frequencies, the difference between which is afrequency which is easily handleable with the electronic circuitry.-1-