Patent ID: 6522807
Filing Date: 2003-02-18
Classification: G02B

Abstract:
A reflector for reflecting light emitted by a light source into an input end of a light guide, said reflector comprising:(a) a collimating reflector having: (i) a narrow apertured end for insertable positioning of said light source within said collimating reflector; (ii) a wide apertured end for emitting light into said light guide; (b) an input end annular reflector having: (i) a narrow apertured end for insertable positioning of said light source through said input end annular reflector; and, (ii) a wide apertured end circumferentially surrounding said collimating reflector near said narrow apertured end of said collimating reflector; wherein said reflectors are cylindrically symmetrical about a common longitudinal axis,(c) said input end annular reflector further comprising a curved surface, wherein, in any cross-sectional plane containing said axis, said curved surface defines: (i) a first arc on one side of said axis, said first arc having a first centre of curvature located on said one side of said axis, and located within a cylinder which is symmetrical about said axis and which has a diameter not greater than the diameter of said narrow apertured end of said collimating reflector; and, (ii) a second arc on an opposed side of said axis, said second arc having a second centre of curvature located on said opposed side of said axis, and located within said cylinder.