Camera flash unit including a condenser lens element with a TIR

Details Camera flash unit including a condenser lens element with a TIR Camera flash unit including a condenser lens element with a TIR

1997-09-17

2000-07-11

Metjahic, Safet

Photography

With object illumination for exposure

396176, 396 6, G03B 1503, G03B 1702

Patent

active

060885408

ABSTRACT:
A camera flash unit for illumination of an associated target surface comprises a linearly symmetric flash light source providing light defined as light rays, a reflector directing the light rays from the flash light source towards the associated target surface and a refractive/TIR (Totally Internally Reflective) condenser lens element. The reflector is located adjacent to one side of the flash light source. The refractive/TIR condenser lens element has optical power in two orthogonal directions and is located adjacent to another side of the flash light source. The refractive/TIR condenser lens element has two surfaces--a back surface facing the light source and a front surface. One of the two surfaces is a hybrid refractive/TIR surface, the other of the two surfaces is a refractive surface.

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Abstract JP 08334811-A, Light illumination device for photographic camera.
Abstract JP TIR For Lenses Fluorescent Lamps, Spie Conference 2538, Jul. 11, 1995.
Optics, by Eugene Hecht/Alfred Zajac, Adelphi University, Feb. 1979, pp. 81-85.

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