Illumination – Light fiber – rod – or pipe – Illuminating or display apparatus
Reexamination Certificate
2006-04-05
2009-06-23
Payne, Sharon E (Department: 2875)
Illumination
Light fiber, rod, or pipe
Illuminating or display apparatus
C362S555000, C362S092000, C362S560000
Reexamination Certificate
active
07549783
ABSTRACT:
Luminaire with directional side-light extraction comprises a light pipe with a light-carrying core, and with a light-extraction structure along a first longitudinal side of the luminaire, confined to a radial swath of the luminaire, along the longitudinal axis of the luminaire, of substantially less than 180°. The second end of the light pipe has light-saving means for directing saved light from the second end towards the first end. The light-extraction means is adjustable to accommodate angular distributions of light from various light sources.
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US 6,419,383, 07/2002, Lundin et al. (withdrawn)
Photograph of light pipe shown at the following two exhibitions: (1) Defense Advanced Research Projects Agency (DARPA), attended by military—and military contractors, Mar. 9-11, 2004 (DARPA) (2) Light Fair, Las Vegas, Nevada, attended by the public, Mar. 31,-Apr. 2, 2004.
4 pages entitled “Uniglo Backlighting” from http://www.poly-optical.com/uniglo.html webpage—(viewed on May 2, 2004) showing uniform extraction of light from a light guide—admitted as prior art.
2 pages entitled “Design of Luxaura Light Guide” from http://www.luxaura.com/tech.shtml website—(viewed on May 2, 2004) showing emitting light in a radial swath—admitted as prior art.
Davenport, Cassarly, Hough, Optimizing Angle-to-Area-Converting, Light-Piping Systems Using—Surface Features, Proc. SPIE, Aug. 2005, pp. 29-38, vol. 5942, USA.
Cassarly William J.
Davenport John M.
Davenport Thomas L. R.
Jenson Chris H.
Bruzga Charles E.
Energy Focus, Inc.
Optical Research Associates
Payne Sharon E
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