FIELD: radio engineering, communication.
SUBSTANCE: in the receiver an optical filter is used, based on a single crystal of hexaqua nickel sulphate cutting off a spectral region, in which interference from the sunlight is generated, and passing a portion of the ultraviolet spectrum of 240-270 nm corresponding to the spectral range of the source of the desired signal.
EFFECT: ensuring the line of sight of the intersection zone of the optical axes of the source and receiver and increasing the sensitivity of the connection.
2 dwg
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