DETECTOR OF OBJECTS AGAINST BACKGROUND OF STARS Russian patent published in 1995 - IPC

FIELD: optical detection and ranging. SUBSTANCE: detector of objects against background of state has receiving telescope, spatial-time light modulator with control unit, source of coherent light, optically coupled polarization beam splitter, objective and transmitting television camera, comparator, threshold device and video control unit connected in series as well as amplification and computation unit. It is supplemented with electrooptical shutter with unit controlling operational modes placed between source of coherent light and polarization beam splitter. Spatial-time light modulator is manufacture in the form of electron-optical converter with first transparent electrode, dielectric mirror, photorefractive crystal and second transparent electrode applied in succession. EFFECT: increased probability of detection. 4 dwg