LASER PROJECTION SYSTEM FOR DISPLAYING TV INFORMATION Russian patent published in 1998 - IPC

FIELD: public use projection screens for displaying TV picture. SUBSTANCE: device has optical laser resonator which is designed as three-mirror non-stable telescopic resonator with two concave spherical or cylindrical mirrors and flat output mirror which has communication hole. Radius of first mirror is greater than that of second mirror. Flat output mirror is mounted at angle of 45 degrees with respect to optical axis of resonator. Output laser beam goes through serial circuit of splitter of spectral components of laser beam, converter laser beam polarization from linear to elliptic form, converter of apertures of laser beam, acoustic- optical modulator, anamorphic corrector, selecting diaphragm, mirror galvanometer. In addition device may have compensator of time shift of TV line for two spectral components of laser beam. Latter unit is located behind acoustic-optical modulator along movement of diffracted laser beams. EFFECT: 4 cl, 4 . dwg