Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1993-04-29
1995-04-25
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
372 38, G01C 1964
Patent
active
054105153
ABSTRACT:
A light source with wavelength compensation for a fiber optic rotation sensor includes a light source to provide light for input to the fiber optic rotation sensor. A source control circuit generates a source control signal representative of the temperature of the light source. A driver generates a drive signal as a function of the source control signal to drive the light source. One of a plurality of scale factors for the fiber optic rotation sensor is generated also as a function of the source control signal over a predetermined temperature range. The source control circuit includes a temperature sensor which provides a current signal representative of the temperature of the light source and a buffer network for sinking the current signal and for generating a source control voltage as the source control signal. A method for wavelength compensation of a light source for a fiber optic rotation sensor includes sensing a temperature of the light source and generating a source control signal representative of the temperature. A drive signal is applied to the light source as a function of the source control signal and a scale factor for the fiber optic rotation sensor is generated as a function of the compensation signal.
REFERENCES:
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patent: 5043992 (1991-08-01), Royer et al.
patent: 5272516 (1993-12-01), Ashizuka
E. Udd, et al., "Scale Factor Correction in the Phase-Nulling Optical Gyro", Fiber Optic and Laser Sensors II, Proc.SPIE vol. 478, pp. 136-141 (1982).
G. Schiffner, et al., "Fiberoptic Rotation Sensor: Analysis of Effects Limiting Sensitivity & Accuracy", Fiber Optic Rotation Sensors and Related Technologies, pp. 226-274 (1982).
M. S. Bielas, et al., "Test Results of a High Performance Fiber-Optic Rotation Sensor", Fiber Optic Gyros: 10th Anniversary Conference, Proc. SPIE vol. 719, pp. 81-86 (1986).
R. Y. Liu, et al., "Progress Toward an Inertial Grade Fiber Optic Gyroscope", Proceedings of the National Technical Meeting, The Institute of Navigation, pp. 251-255 (1989).
Bielas Michael S.
Dankwort Rudolf C.
Honeywell Inc.
McGraw Vincent P.
Shudy Jr. John G.
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