Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1983-12-16
1986-04-29
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902, G01C 1964
Patent
active
045853479
ABSTRACT:
The rotation rate measuring instrument, in which the phase difference caused by the Sagnac effect is evaluated, contains two optical waveguides (7, 17). From a light beam, two component beams (CW, CCW) are derived which traverse the first optical waveguide (7) in opposite directions. A passive beam splitter (16) connects the first optical waveguide with the second optical waveguide (17) and splits each of the component beams into two further component beams. Of these further component beams, one remains in the first optical waveguide, and the other enters the second optical waveguide, where it propagates in the opposite direction. Evaluation, for which the two component beams are combined after having traversed one or both optical waveguides, takes place on a time-division multiplex basis, such that either the traversal of only one optical waveguide (7) or the traversal of both optical waveguides (7, 17) is taken into account. By comparing the two measurements, additional nonreciprocal phase differences (.phi..sub.NR) are determined, which can be taken into account during evaluation.
Auch Wilfried
Schlemper Eberhard
International Standard Electric Corporation
McGraw Vincent P.
O'Halloran John T.
O'Hare Thomas P.
Turner S. A.
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