Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1989-12-21
1993-08-24
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
385 39, 385122, G01C 1972
Patent
active
052393623
ABSTRACT:
The fiber-optic rotation sensor comprises a sensing loop using an optical fiber which essentially performs a single polarization when bent, both end portions of the sensing loop being disposed with the principal axes of polarization thereof orthogonal to each other and the end portions being joined by an evanescent wave coupling to form a ring interferometer, a device for introducing to an input end of the interferometer a linearly polarized light at a bearing of 45.degree. relative to the principal axis of polarization of the interferometer, and a retardation measuring system provided at an output end of the interferometer for picking up an electrical output proportional to a rotational angular velocity applied to the interferometer. When the linearly-polarized light is introduced to the input end of the coupling portion of the ring interferometer at a bearing of 45.degree. with respect to the principal axis of polarization of the interferometer, the light is branched into two polarized light beams running through the sensing loop, one clockwise and the other counterclockwise. The polarized light beams are recombined with each other to be input to the retardation measuring system from which an electrical output proportional to the rotational angular velocity applied to the interferometer is picked up.
REFERENCES:
patent: 4688882 (1987-08-01), Failes
patent: 4856900 (1989-08-01), Ivancevic
patent: 4881817 (1989-11-01), Kim et al.
patent: 4962987 (1990-10-01), Doran
Hitachi Cable Limited
Keesee LaCharles P.
Turner Samuel A.
LandOfFree
Fiber-optic rotation sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fiber-optic rotation sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fiber-optic rotation sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-832869