Illumination arrangement, especially for projectors, has mirror optics with annular hollow mirror facing lamp, central mirror facing away from lamp that reflects edge rays into central region

摘要

The arrangement has a source (1) with a reflector (2) and a lamp (3) at a first focal point (F1). The source outputs a convergent beam from the lamp to a second focal point (F2) in whose angle spectrum along the propagation axis there is a missing angle range including parallel to the optical axis. A mirror arrangement with an annular hollow mirror (7) facing the lamp and a central mirror (8) facing away from the lamp reflects edge rays into the central region.