Side-light extraction by light pipe-surface alteration and...

Optical waveguides – With optical coupler – Particular coupling structure

Reexamination Certificate

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Reexamination Certificate

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10797383

ABSTRACT:
A light pipe with side-light extraction by light pipe-surface alteration includes an optical light pipe with a plastic light-carrying portion covered with a fluoropolymer cladding. A plurality of light-extraction devices is spaced along an active section of the light pipe for emission of side light over only a range from about 2 to 270 degrees of the cross-sectional circumference of the light pipe in the active section. The light-extraction devices have inlets passing through the cladding and optically contacting the plastic light-carrying portion. Another form of light pipe with side-light extraction by light pipe-surface alteration includes an optical light pipe with a plastic light-carrying portion. An active section of the light pipe for side light emission comprises an axisymmetrical change of area of cross section of the light pipe that generally diminishes from an inlet end of the active section, through the active section.

REFERENCES:
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patent: 5307245 (1994-04-01), Myers et al.
patent: 5406641 (1995-04-01), Bigley, Jr. et al.
patent: 5673344 (1997-09-01), Li et al.
patent: 5982969 (1999-11-01), Sugiyama et al.
patent: 6104371 (2000-08-01), Wang et al.
patent: 6137928 (2000-10-01), Albrecht
patent: 6304693 (2001-10-01), Buelow, II et al.
patent: 6307987 (2001-10-01), Wang et al.
patent: 6347172 (2002-02-01), Keller et al.
patent: 6563993 (2003-05-01), Imamura et al.
patent: 6597834 (2003-07-01), Hata
patent: 7-198950 (1995-08-01), None
RD-390016-A, Sep. 1996, RD, Anon.
RD-388052-A, Jul. 1996, RD, Anon.
2 Pages entitled “Uniglo Backlighting” from http://www.poly-optical.com/uniglo.html webpage (when last 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” http://www.luxaura.com/tech.shtml webpage (when last viewed on May 2, 2004) showing light emitting in a radial swath—admitted as prior art.
Specification and drawings for U.S. Appl. No. 10/796,830, filed Mar. 9, 2004, for Light Pipe with Directional Side-Light Extraction by Roger F. Buelow II, John M. Davenport, and Chris Jenson. This application is copending with the present application and is assigned, or subject to assignment, to the same assignee as the present application.
Specification and drawings for U.S. Appl. No. 10/797,761, filed Mar. 10, 2004, for Light Pipe with Side Light Extraction by Roger F. Buelow II, Chris H. Jenson, and John M. Davenport. This application is copending with the present application and is assigned, or subject to assignment, to the same assignee as the present application.
Specification and drawings for U.S. Appl. No. 10/108,279, filed Apr. 18, 2005, for Efficient Luminaire with Directional Side-Light Extraction by William J. Cassarly, Thomas L.R. Davenport, John M. Davenport, and Chris H. Jenson. This application is copending with the present application and is assigned, or subject to assignment, to the same assignee as the present application.

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