Lasers angular rate sensor

Details Lasers angular rate sensor Lasers angular rate sensor

1979-09-25

1981-09-08

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

042881633

ABSTRACT:
A ring laser comprises a closed optical path defined by two mirrors and a partially-reflecting surface, and one arm of the path includes a laser active medium which produces two counter-rotating beams. The partially-reflecting surface diverts part of each beam by way of an optical energy reflecting device so that the two diverted beams intersect in a plane to produce an interference pattern. An optical grating of similar period to the pattern is located adjacent to and parallel to the plane of the interference pattern, and a detector is located so as to detect movement of the resulting Moire fringe pattern.

REFERENCES:
patent: 3373650 (1968-03-01), Killpatrick
patent: 3390606 (1968-07-01), Podgorski
patent: 3484169 (1969-12-01), Skalski et al.
patent: 4152072 (1979-05-01), Hutchings

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