FIELD: laser radar engineering.
SUBSTANCE: device has laser, transmitting telescope, transmitting channel photo-mixer, four receiving channels, each of which channels has receiving telescope connected in series with filter and receiving channels' photo-mixers. Outputs of filters are optically conjugated with first and second photo-mixers correspondingly through collecting lenses. Outputs of photo-mixers are connected with frequency meters. Outputs of mixer of receiving channels are connected with one input of mixer through adder. The other input of mixer is connected with output of photo-mixer of transmitting channel and output of mixer is connected with frequency meter.
EFFECT: improved precision of measurement.
2 dwg
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