Method and apparatus for measuring angular rate with a passive o

Details Method and apparatus for measuring angular rate with a passive o Method and apparatus for measuring angular rate with a passive o

1985-07-19

1987-10-27

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964, G01B 902

Patent

active

047026006

ABSTRACT:
A method and apparatus for reading out angular rates by means of a passive optical resonator provides for the generation of three component light beams individually tuned to distinct resonator modes. One component light beam is radiated into the resonator in the opposite direction to the two other component light beams. By means of an evaluating logic, differences are formed between the counterrotating light beams and the differences weighted and subtracted from each other to provide angular rate. The optical length of the resonator, and, thus, temperature are available as a weighted sum of the differences. Temperature drift may be eliminated from angular rate measurements by compensation according to the invention.

REFERENCES:
patent: 4514088 (1985-04-01), Coccoli
patent: 4569593 (1986-02-01), Auch et al.
patent: 4573795 (1986-03-01), Auch et al.

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