US 7,029,150 B2 Apr. 18, 2006
CATADIOPTRIC LIGHT DISTRIBUTION
Inventor: Timothy S. Finch, Fishers, IN (US)
Assignee: Guide Corporation, Pendleton, IN
Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 24 days.
Appl. No.: 10/763,785
Filed: Jan. 23, 2004
Prior Publication Data
US 2005/0162854 Al Jul. 28, 2005
F21V 7/00 (2006.01)
U.S. CI 362/298; 362/299; 362/300;
Field of Classification Search 362/298 302,
362/305, 328-329, 335, 346-347, 349, 520 See application file for complete search history.
U.S. PATENT DOCUMENTS
A Catadioptric Light Distribution System that collects and collimates the hemispherical pattern of light emitted by a Lambertian light emitting diode (LED) into a collimated beam directed essentially parallel to the optical axis of the LED. The system comprises a circular condensing lens having a center axis that is aligned with the optical axis of the LED parabolic reflector having circular opening formed therethrough which is centered on the center axis of the parabolic reflector and a double bounce mirror. The light reflected and culminated by the parabolic reflector is directed onto the circular annular double bounce mirror so that this light is collimated in an annular beam which passes around the edge of the condensing lens.
12 Claims, 3 Drawing Sheets