Ring laser gyroscope with doppler mirrors

Details Ring laser gyroscope with doppler mirrors Ring laser gyroscope with doppler mirrors

1981-06-15

1983-10-18

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01C 1964

Patent

active

044102763

ABSTRACT:
A ring laser gyroscope has at least two of its mirrors vibrated perpendicular to their reflective surfaces by equal and opposite amounts to maintain the total beam path length constant. The amplitude of vibration causes the beams to be shifted across surfaces of all of the mirrors by a distance that is at least close to a Bessel zero distance so as to reduce the intensity of back scattered radiation at the main wavelength to a value close to zero. For an equilateral triangular ring laser gyroscope, two of the mirrors are vibrated between about 0.66.lambda. and 0.74.lambda., optimally about 0.71.lambda.. For an isosceles triangle having vibrating mirrors at two vertexes having angles of about 51.65.degree., the magnitude of vibration should be about 0.91.lambda..

REFERENCES:
patent: 3533014 (1970-10-01), Coccoli et al.
patent: 4152071 (1979-05-01), Padgorski
patent: 4281930 (1981-08-01), Hutchings
patent: 4348113 (1982-09-01), Bonfils

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