Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1979-07-30
1981-06-16
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
350 9611, 350 9617, G01C 1964
Patent
active
042734452
ABSTRACT:
A Sagnac interferometer gyroscope includes a semiconductor chip on which is formed an optical waveguide. Means are provided on the optical waveguide to inject a laser light beam into the waveguide and onto a divider to produce first and second divided beams. Second and third dividers are provided in the waveguide to generate a reference signal onto a pair of photodectors disposed to receive the divided light waves. The light waves are modulated with first and second frequencies prior to their second division by a pair of Bragg frequency shifter interdigital transducers. The divided and modulated light beams are then directed through an optical path encompassing an axis of sensitivity of the gyro. In one embodiment the path is formed by an optical fiber with connections to the chip. In another embodiment the optical path is defined within the chip itself by reflectors or deflectors at selected locations about the peripheral of the chip. The respective light beams after having traversed the light path are then combined and detected by a second pair of photodectors. The signals of the photodectors are compared to determine the rotation of the gyroscope about the axis of sensitivity.
REFERENCES:
patent: 3994559 (1976-11-01), Crow
patent: 4013365 (1977-03-01), Vail et al.
patent: 4120588 (1978-10-01), Chaum
patent: 4133612 (1979-01-01), Redman
patent: 4138196 (1979-02-01), Redman
patent: 4208128 (1980-06-01), Thompson et al.
Anderson Dean B.
August Rudolf R.
Thompson David E.
Yao Shi-Kay
Bachand Richard A.
Hamann H. Fredrick
McGraw Vincent P.
Rockwell International Corporation
LandOfFree
Interferometer gyroscope formed on a single plane optical wavegu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interferometer gyroscope formed on a single plane optical wavegu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interferometer gyroscope formed on a single plane optical wavegu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-152736