CONDENSER RADIATOR Russian patent published in 1998 - IPC

FIELD: projection optical systems; motion picture engineering. SUBSTANCE: condenser radiator has reflector, counterreflector, radiation source, and lens. Front counterreflector with hole the center of which is combined with optical axis of condenser radiator is positioned between radiation source and lens. Front counterreflector radius does not exceed double radius of radiation source bulb, and size of hole is in direct proportion to aperture of lens entrance pupil. EFFECT: more effective construction. 1 dwg