Patent ID: 6334700
Filing Date: 2002-01-01
Classification: G01S,Y10S

Abstract:
A system for projecting electromagnetic radiation, comprising:a) a base having a first defined area substantially facing a region to be illuminated with the electromagnetic radiation, the first defined area having a reflective characteristic with respect to the electromagnetic radiation; b) a mask between the base and the region to be illuminated at a predetermined distance from the first defined area, said mask having a second defined area substantially facing the first defined area and having a reflective characteristic with respect to the electromagnetic radiation; c) a cavity formed in one of the first and second defined areas, said cavity comprising an inner surface with a substantially diffuse reflective characteristic with respect to the electromagnetic radiation and an opening, a perimeter of the opening of the cavity forming an aperture, wherein the mask is positioned relative to the base and configured so as to occlude electromagnetic radiation emerging from the aperture of the cavity with respect to illumination of the region; and d) a source configured to emit a substantial first portion of the electromagnetic radiation directly into a predetermined section of the region to be illuminated and to emit a substantial second portion of the electromagnetic radiation into the cavity, such that: the direct radiation provides a relatively high intensity illumination in the predetermined section; and the base, mask and cavity provide a tailored intensity distribution of the second portion of the electromagnetic radiation over another predetermined section of the region to be illuminated, the tailored intensity distribution including a relatively low intensity illumination.