DEVICE FOR PROJECTION OF IMAGE ON HALF-SPHERICAL SURFACE Russian patent published in 1999 - IPC

FIELD: optical instruments. SUBSTANCE: device has laser, optical system and flat pattern. Goal of invention is achieved by introduced shutter, which abuts on flat pattern, light absorbing cone, which is located along optical axis and which base is attached to half-spherical surface, and round screen, which is mounted on cone vertex in perpendicular to optical axis. Both shutter and round screen are mounted with possibility for mounting and removal in process of projection of image onto half-spherical surface. Image is produced in two stages: using shutter and round screen. Sequential use of shutter and screen provides possibility to eliminate parasitic exposition of half-spherical surface of article to be processed when it receives image from flat pattern. EFFECT: prevention of non-uniform exposition of half-spherical surface. 3 dwg