RECEIVING OPTICAL SYSTEM FOR OPTICAL-ELECTRONIC INSTRUMENT Russian patent published in 1997 - IPC

FIELD: detection of optical information beams in presence of continuous and pulse-frequency laser beams. SUBSTANCE: device has serial optical circuit of aperture diaphragm, lens, field diaphragm, condenser and photodetector. In addition device has chamber which walls are transparent to laser beams, U-shaped tube, plunger and reflecting member. Chamber is located before aperture diaphragm, is filled with volatile liquid which has graphite or carbon particles. Said chamber also has hole which is located on optical axis of system. U-shaped tube is sealed to tray and is filled with mercury. Reflecting member is connected to plunger and is located before field diaphragm. EFFECT: increased functional capabilities. 1 dwg