OPTICAL RASTER CONDENSER AND OPTICAL DEVICE COMPRISING SAID RASTER CONDENSER

摘要

The present invention relates to an optical condenser as well as to optical devices comprising this condenser which can be used in projection systems, in display screens, in information panels or other devices. The condenser and optical devices include a concentrator-lens raster for concentrating light which is made in the shape of a matrix comprising a plurality of hollow concentrators as well as a lens raster. Each concentrator is made in the shape of a truncated cone or pyramid comprising a lateral envelope, an input-end reflector and a transparent output end for reflecting light inside said concentrator. The light-collecting lenses of the raster are either tightly attached to the concentrator output ends and made in the shape of a monolithic lens raster, or fixed to the lens raster and associated with the output ends. This lens raster can be realised from spherical lenses made of glass. In the case of optical devices comprising a concentrator-lens raster at the input ends, light sources are arranged inside said concentrators while additional light sources and/or reflectors and/or anti-flare coatings are applied outside said concentrators and/or on the rear side of the lens raster. Photo-conductors can also be placed at the concentrator input ends and/or between the concentrators and the lens raster, wherein said photo-conductors are used for introducing into the concentrator light rays which are provided by external illumination from outer light sources arranged behind the condenser ends. The input-end reflectors, the concentrator side surfaces and the lens raster can be made transparent for the light exciting the luminophores.