Patent ID: 6088540
Filing Date: 2000-07-11
Classification: G03B

Abstract:
A camera flash unit for illumination of an associated target surface comprising:(i) a linearly symmetric flash light source, said light source providing light defined as light rays;(ii) a reflector directing some of the light rays from said flash light source towards the associated target surface, said reflector being adjacent to one side of said flash light source;(iii) a refractive/TIR condenser lens element located adjacent to another side of a said flash light source, said condenser lens element having unequal optical power in two orthogonal directions, said condenser lens element having two surfaces--a back surface facing said flash light source and a front surface, one of said two surfaces being a hybrid refractive/TIR surface, the other of said two surfaces being a refractive surface with optical power.