FIELD: physics, acoustics.
SUBSTANCE: invention is related to the field of instrument-making. In filter that comprises acoustic line from anisotropic crystal, piezoelectric transducer, input polariser and output analyser, acoustic line used is represented by anisotropic crystal in the form of prism extended along crystallographic axis x. Side of crystal with piezoelectric transducer is arranged with a bevel in plane xy to the side of positive axis y, which twice exceeds bevel of the opposite side, which reflects ultrasound, beveled to the same side, besides value of side bevel angles is determined provided that ultrasound reflection is realised with further distribution along axis x, which coincides with direction of distribution of light beam that is inserted through one or another beveled sides of crystal.
EFFECT: higher accuracy of spectral measurements.
1 dwg
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