INFRARED LASER SCANNING UNIT Russian patent published in 1995 - IPC

FIELD: TV installations. SUBSTANCE: device has laser 1, collimator 2, the first and the second mirrors 3 and 4, the first tetrahedral prism 5 with reflecting faces, engine 6, the second tetrahedral prism 7 with reflecting faces, the first and the second off-axial parabolic mirrors 8 and 9, photodetector made on the base of avalanche photodiode 10, additional photodetector made on the base of avalanche photodiode 10, additional photoreceiving unit 11 made on the base of avalanche photodiode mounted in focuses of the first and the second mirrors 8 and 9 correspondingly. All the units are connected in sequence. Outputs of the photoreceiving units are connected with signal processing unit through analog-to-digital converter. EFFECT: improved efficiency. 2 dwg