High efficiency illuminator

摘要

An illuminator for use with a light source (14) having a light distribution pattern within a solid angle of 2 pi steradians. The light source (14) comprises or includes a series of LED's or light pipes positioned at or near a focal point (16) of a reflective surface (12) and inclined at an angle to a focal axis (18) of the reflective surface (12) such that all of the light from the light source (14) is collected and distributed by the reflective surface (12), whereby the reflective surface (12) is optimized to confine the light output only to the required photometric zones thus maximizing the efficiency of the illuminator.