DEVICE FOR TWO-WAY OPTICAL COMMUNICATION Russian patent published in 2000 - IPC

FIELD: industrial physics, in particular, optical communication systems, applicable for creation of optical systems of two-way optical communication with automatic control of laser radiation power. SUBSTANCE: optical system of guidance of the received beam to the photodetector has at least three lenses located around the edges of the receiving stage, with the transmitting laser located in the center of it. The reflecting surface and rotary mirrors located at an angle to the optical axis of the collecting lens (5^°≤a≤10^°) provide for alignment of the optical system. It reduces the negative effect of solar exposure, provides for an enhanced signal-to-noise ratio and serviceability in any atmospheric conditions and conditions of mechanical effects. EFFECT: expanded dynamic range of photodetector and enhanced signal-to-noise ratio due to stabilization of mean power and modulation amplitude of the light legitimate signal at the photodetector input at atmospheric fluctuations, as well as due to elimination of the effect of solar exposure. 4 cl, 12 dwg