Laser light effects integration method for film projection e.g in cinema or theatre

摘要

The laser beam(8) is radiated through at least one sound passage opening(4) in at least one region of the rear side(3) of the projection screen(1). The laser beam is widened, so that its dia. is greater than the distance between two adjacent sound passage openings(4).The laser beam is radiated on a line on the projection screen be means of a deflection system(7). The laser beam radiation is synchronised with the film operation. So that the laser beam radiation takes place at certain times on established regions.