Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1990-12-19
1993-02-09
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1972
Patent
active
051856425
ABSTRACT:
A method and circuit arrangement for determining angular velocities by means of an optical fiber ring interferometer includes, in addition to, a phase modulator for modulating light waves passing through an optical fiber ring of the interferometer at a phase modulation frequency f, and a device for combining light waves leaving the optical fiber ring to produce an output signal, a unit for generating a sampling frequency f.sub.A according to the following equations: ##EQU1## wherein the factors m and l are integers and f.sub..DELTA. is a whole number component i.e., subharmonic, of the phase modulation frequency. The output signal of the interferometer is sampled at the frequency f.sub.A during conversion via an analog/digital converter into a digital signal. The digitilized signal is evaluated to determine the angular velocity.
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patent: 4456376 (1984-06-01), Carrington et al.
patent: 4549806 (1985-10-01), Marten et al.
"Fiber Optic Laser Gyro Signal Detection and Processing Technique", Martin et al, Mar. 1978, Spie, pp. 98-102.
ANT Nachrichtentechnik GmbH
Turner Samuel A.
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