Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1983-08-11
1985-10-08
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 964
Patent
active
045456828
ABSTRACT:
A light source signal is amplitude modulated by a phase modulated sinusoid and passes through two directional couplers so that two beams are formed. The beams are transmitted to the ends of an optic-fiber coil for propagation therethrough in opposite circular directions. An optical phase modulator is present at one end of the coil so that a phase modulation of fixed frequency and amplitude is introduced to a first beam as it enters the coil and to the counterpropagating beam as it leaves the coil. The counterpropagating beams produce a signal at a photodetector which is a function of rotation rate. An electronic control unit is connected to the photodetector to generate a digital signal output as a frequency which is a measure of rotation rate. A feedback loop is completed by connecting a signal, produced by the control unit, to the amplitude modulated light source for nulling the phase shift due to rotation rate.
REFERENCES:
patent: 4299490 (1981-11-01), Cahill et al.
patent: 4372685 (1983-02-01), Ulrich
Davis et al., "Techniques for Shot Noise Limited Inertial Rotation Measurement Using a Multiturn Fiber Sagnac Interferometer", SPIE, 1978, pp. 131-136.
Kennedy Thomas W.
McGraw Vincent P.
The Singer Company
Turner S. A.
LandOfFree
Optical gyroscope does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical gyroscope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical gyroscope will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2216944