Laser gyro output optics structure

Details Laser gyro output optics structure Laser gyro output optics structure

1983-04-29

1984-05-22

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356351, G01C 1964

Patent

active

044498241

ABSTRACT:
A four frequency laser gyroscope system having a rugged and compact output structure for producing output signals representing the frequency differences between counter-circulating wave pairs circulating as two beams within the gyroscope cavity. A partially transmitting dielectric mirror forms both one of the cavity reflectors and the means for extracting a small portion of each beam. The two extracted beams are combined on a beam splitter. Both the transmitted and reflected beams from the output of the beam splitter, each containing waves of all four frequencies, are utilized. Each resultant beam is then polarization discriminated to extract the desired signal content. The entire structure is adapted for rigid mechanical coupling and may be constructed to have a small size.

REFERENCES:
patent: 3332314 (1967-07-01), Rosenthal
patent: 3382760 (1968-05-01), Macek
patent: 3390606 (1968-07-01), Podgorski
patent: 3647303 (1972-03-01), Kramer, Jr.
patent: 3741657 (1973-06-01), Andringa
patent: 3807866 (1974-04-01), Zingery
patent: 3892486 (1975-07-01), Ferrar
patent: 4141651 (1979-02-01), Smith et al.

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