Ring laser gyroscope with doppler mirrors

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

H - Electricity

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345/10

H01S 3/083 (2006.01) G01C 19/64 (2006.01) G01C 19/70 (2006.01)

Patent

CA 1170344

Abstract of the Disclosure 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 tri- angle having vibrating mirrors at two vertexes having angles of about 51.65°, the magnitude of vibration should be about 0.91.lambda..

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