Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1985-07-26
1988-07-12
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902
Patent
active
047566205
ABSTRACT:
A fiber-optic rotation sensor (fiber gyro) includes an optical transmission system into which a light signal is fed by means of a laser diode. The modulation is effected by means of a piezomodulator. The coupled-out signal is fed to a receiver diode and the amplified output signal of the latter is fed to a phase sensitive rectifier and to a peak-to-peak value measuring device. The measured peak-to-peak value represents the proportionality factor K through which the output signal of rectifier is divided. Therefore it is possible with this method to constantly measure the proportionality factor K, which changes under various influences and to thus eliminate errors in the determination of the Sagnac phase.
REFERENCES:
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patent: 4372685 (1983-02-01), Ulrich
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patent: 4549806 (1985-10-01), Martem et al.
patent: 4569593 (1986-03-01), Auch et al.
patent: 4573795 (1986-02-01), Auch et al.
Optics Letters, May 1980, vol. 5, No. 5, R. Ulrich, "Fiber-Optic Rotation Sensing with Low Drift", pp. 173-175.
McGraw Vincent P.
Teldix GmbH
Turner S. A.
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