The present invention provides an illuminating apparatus for illuminating a surface to be illuminated by the use of an arcuate light source image. A point source of light is intermediately imaged in the form of an arcuate by a concave mirror. The arcuate intermediate light source image is further imaged...http://www.google.com/patents/US4572659?utm_source=gb-gplus-sharePatent US4572659 - Illuminating apparatus
