Laser gyrometer having the two beams emerging from the two ends

Details Laser gyrometer having the two beams emerging from the two ends Laser gyrometer having the two beams emerging from the two ends

1979-07-17

1981-02-03

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

042485355

ABSTRACT:
A laser gyrometer for the measure of the angular speed of a rotating system, comprising an optical fiber wound around the rotation axis, in which two coherent light beams are guided in the direction of the rotation and in the opposite direction, respectively, so as to be subjected to the Sagnac effect. The two beams emerging from the two ends of the fiber are directed along two separate adjacent parts of one beam. Measurement of the phase shift between the two parts is based on the displacement of the center of the diffraction spot obtained in the focal plane of a lens, positioned in the path of the beam.

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