FIELD: measuring equipment.
SUBSTANCE: device contains a noncollinear acousto-optic (AO) filter in which the orientated facet of the acousto-optic filter cell crystal is used as an element for useful diffracted light beam separation. To compensate for the filter crystal dispersion, an adjusting prism made from the AO filter material is used, located behind the output face of the AO filter crystal along the diffracted light beam direction.
EFFECT: increased transmittance, simplification and cheaper construction.
2 cl, 2 dwg, 1 tbl
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