Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1989-01-26
1991-05-28
Turner, Samuel
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902
Patent
active
050188593
ABSTRACT:
A phase difference controller for a rotation sensor based on a coiled optical fiber operating a dual output generator in a feedback loop to provide a pair of signals to operate a pair of frequency translating devices in the optical path with the coil. A pair of sawtooth-like signals of appropriate frequency and polarity operate the frequency translating device to provide a phase difference shift in the optical path.
REFERENCES:
patent: 4728192 (1988-03-01), Shaw et al.
patent: 4834538 (1989-05-01), Heeks et al.
Progress in Optical Fiber Gyroscopes Using Integrated Optics, LeFevre et al., 1986.
"Fiber Gyroscope with Phase-Modulated Single-Sideband Detection", D. Eberhard et al., Optics Letters, vol. 9, No. 1, 1/1984, pp. 22-24.
"Gated Phase-Modulation Approach to Fiber-Optic Gyroscope with Linearized Scale Factor", B. Kim et al., Optics Letters, vol. 9, No. 8, 8/1984, pp. 375-377.
"Closed-Loop Fiber-Optic Gyroscope with a Sawtooth Phase-Modulated Feedback", A. Ebberg et al., Optics Letters, vol. 10, No. 6, 6/1985, pp. 300-302.
"Fiber-Optic Gyroscopes", B. Kim et al., IEEE Spectrum, 3/1986, pp. 54-60.
Chang Chin L.
Dankwort Rudolf C.
Honeywell Inc.
Turner Samuel
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