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Nonimaging optical illumination system

United States Patent

6,019,485
February 1, 2000
View the Complete Patent at the US Patent & Trademark Office
A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source 102, a light reflecting surface 108, and a family of light edge rays defined along a reference line 104 with the reflecting surface 108 defined in terms of the reference line 104 as a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line 104, and D is a distance from a point on the reference line 104 to the reflection surface 108 along the desired edge ray through the point.
Winston; Roland (Chicago, IL), Ries; Harald (Villigen PSI, CH)
Minnesota Mining & Mfg. Co. (St. Paul, MN), ARCH Development Corp. (Chicago, IL)
09/ 167,373
October 6, 1998
Certain rights in this invention are retained by the U.S. Government pursuant to contract DE FG02-87ER 13726 of the U.S. Department of Energy.