Patent ID: 6932496
Filing Date: 2005-08-23
Classification: B64D,B64F,F21S,F21V,F21W,F21Y,Y10S

Abstract:
1. A light transformer for directing part of the light emitted by a light source in a limited angle uninterrupted uniform omnidirectional pattern with precalculated intensity distribution across the limited angle while the remaining emitted light is dispersed across a hemisphere comprising: a truncated hollow conical reflector having a truncated end facing the light source and a cone base opposite the truncated end, wherein a conical reflector axis is coincident with a light source axis, and light passes through an opening on the truncated end; a curved reflective surface between the truncated end and the cone base, wherein the surface reflects light from the light source with given particular spatial intensity distribution in the limited angle uninterrupted uniform omnidirectional pattern with precalculated intensity distribution across said limited angle, the profile of the curved reflective surface calculated as a function of both the light source and the required pattern intensity distribution; and an optical element adjacent the cone base in a plane perpendicular to the conical reflector axis, wherein the optical element disperses the light passing through the truncated hollow cone reflector in the remaining portion of hemisphere not covered with light reflected from the reflective surface.