Ring laser gyroscope beam combiner for separating and combining

Details Ring laser gyroscope beam combiner for separating and combining Ring laser gyroscope beam combiner for separating and combining

1987-04-06

1989-12-12

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, 350171, G01C 1964

Patent

active

048863645

ABSTRACT:
In a monolithic gyro assembly having three ring laser gyroscopes each measuring the inertial rotation of an axis, a polyhedron having three facets is used as the beam combiner for the gyroscope. On one of the facets is mounted a fringe detector for providing inertial rotation information for the gyroscope. On the remaining two facets, on either side of the fringe detector facet, are mounted beam power monitoring diodes for measuring the power of the light intensity of the respective beams. The directly measured power from the beams is then used to move a piezoelectric transducer to maintain constant pathlengths for the gyroscope.

REFERENCES:
patent: 4320974 (1982-03-01), Ljung
patent: 4582429 (1986-04-01), Callaghan
patent: 4585346 (1986-04-01), Ljung
patent: 4677641 (1987-06-01), Podgorski

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