Patent ID: 6637924
Filing Date: 2003-10-28
Classification: F21S,F21Y,G02B

Abstract:
An illumination apparatus, comprising:an elongated waveguide having proximal and distal ends and a central longitudinal axis, said waveguide comprising an elongated forward side for outputting light and an elongated rearward side for reflecting light towards the forward side, said rearward side comprising an elongated reflective surface; a source of light comprising a solid state light emitter on the proximal end of the waveguide; and an optical collimating element disposed between the waveguide and the source of light, which introduces light into the waveguide in the form of a substantially collimated beam having a divergence angle a, said waveguide having a width at the distal end approximately equal to 2 L tan (&agr;), where L is the length of the waveguide between said ends.