FIELD: optics.
SUBSTANCE: invention relates to optical systems, in particular to devices used for mixing or separation of light signals in laser engineering, and can be used in optical gyroscopes, in particular in laser gyroscopes. Laser gyroscope photomixing device includes an output mirror and a pentaprism installed on its reverse side with two beam-splitting coatings on the input facet and a reflecting one on the opposite facet, parallel to the input facet, bevel of the pentaprism, through which the parasitic beam exits, is made at a Brewster angle with respect to the incident beam.
EFFECT: reduction of radiation returning back to the laser gyroscope resonator.
1 cl, 1 dwg
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