FIELD: quantum electronics. SUBSTANCE: device has laser 1, system of N of mirrors 2, N optic phase modulators 3, optic receiver 4, amplifier 5, N band-pass filters 6, N synchronous detectors 8, N low-pass filters 9, N modulating generators 7. The device is characterized in that it furthermore has two angle measuring channels each of which includes four band-pass filters 10 tuned to combination frequencies of signals of modulating generators 7, four amplitude detectors 11, two inverters 12 and adder 13. EFFECT: enhanced accuracy. 1 dwg
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