Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1984-02-22
1987-06-02
Willis, Davis L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
046698825
ABSTRACT:
A sensor is described for detecting the difference in phase of a pair of returned light pulse components, such as the two components of a light pulse of an optical gyro. In an optic gyro, the two light components have passed in opposite directions through a coil of optical fiber, with the difference in phase of the returned light components determining the intensity of light shining on the sensor. The sensor includes a CCD (charge coupled device) that receives the pair of returned light components to generate a charge proportional to the number of photons in the received light. The amount of the charge represents the phase difference between the two light components. At a time after the transmission of the light pulse and before the expected time of arrival of the interfering light components, charge accumulating in the CCD as a result of reflections from optical components in the system, are repeatedly removed from the CCD, by transferring out charges in the CCD and dumping these charges.
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"Limitation of Rotation Sensing by Scattering", Cutler et al., Optical Society of America, 11-1980, pp. 488-490.
"Mosaic Image Sensor Cell", Will, IBM Technical Disclosure Bulletin, S-1969, p. 1618.
W. C. Goss et al., "Fiber-Optic Rotation Sensor Technology", Applied Optics, vol. 19, No. 6 (1980).
Goss Willis C.
Janesick James R.
Jones Thomas H.
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
Turner S. A.
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