Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1986-06-04
1989-01-31
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
048012068
ABSTRACT:
A dither flexure is mounted between a ring laser gyroscope body and a support such that the ring laser gyroscope may be dithered to have angular oscillations about a sensing axis. A sensor provides signals indicative of the amplitude of the oscillations of the ring laser gyroscope body relative to the support to a control circuit. The control circuit dithers the flexure to maintain the amplitude of the oscillations between a predetermined range at the resonant frequency of the flexure. The frequency of the dither oscillations is modulated about a tracking frequency, and the effect of frequency changes in the dither drive signal on the amplitude of the oscillations is demodulated to determine the resonant frequency of the dither flexure.
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Litton Systems Inc.
Lynn John H.
McGraw Vincent P.
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