Single mirror ring laser gyro readout without combining optics

Details Single mirror ring laser gyro readout without combining optics Single mirror ring laser gyro readout without combining optics

1982-09-23

1985-04-30

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

045148325

ABSTRACT:
A detector structure for use in a ring laser gyroscope includes a partially reflective surface on an inside face of a carrying substrate for passing a portion of each of the counter rotating gyroscope beams for detection and for reflecting a portion of each of the beams into a light path of the laser gyroscope without passing any optical elements of the detector structure. A detector substrate is spaced with respect to said partially reflective surface to receive the portions of the beams passing the partially reflective surface with patterns formed by the respective beams only partially overlapping. A pair of detectors are provided on the detector substrate, located to receive at least a nonoverlapping portion of each of the beam patterns to provide an intensity indication of the respective beams, and another detector is also located on the substrate, located to receive an overlapping portion of the beams for detecting the rate and sense of motion of interference fringes produced by the respective beams to provide an indication of the frequency difference between said beams. The detector structure also includes yet another detector on the substrate, located to receive an overlapping portion of the beams to provide an indication of the sum of the intensities of the respective beams.

REFERENCES:
patent: 4152072 (1979-05-01), Hutchings

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