Patent ID: 6945670
Filing Date: 2005-09-20
Classification: F21S,F21V,F21Y

Abstract:
1. A luminaire comprising: at least one lamp; a reflector surrounding the lamp, a side of said reflector facing towards said lamp being reflecting, said reflector being formed with an emission opening for emission of light; and an optical element arranged in or before the emission opening for deflecting light beams which enter into a light entry surface and exit from a light exit surface opposite to said light entry surface of the optical element such that light beams exit from said optical element at an exit angle which is smaller than a predetermined limit exit angle of about 70°, said optical element having a plate-like core of transparent material which is occupied on said light entry surface with tapered microprisms formed by furrows, each of said microprisms having on at least two sides roots from which said microprism tapers, said reflector being shaped and arranged with reference to said lamp such that only light beams reflected at said reflector and impinging on said light entry surface can exit said light exit surface.