The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 2007
Filed:
Apr. 18, 2005
William J. Cassarly, Mason, OH (US);
Thomas L. R. Davenport, Tucson, AZ (US);
John M. Davenport, Middleburg Heights, OH (US);
Chris H. Jenson, Twinsburg, OH (US);
William J. Cassarly, Mason, OH (US);
Thomas L. R. Davenport, Tucson, AZ (US);
John M. Davenport, Middleburg Heights, OH (US);
Chris H. Jenson, Twinsburg, OH (US);
Fiberstars, Inc., Solon, OH (US);
Abstract
A luminaire with directional side-light extraction comprises a light pipe with a light-carrying core. The light pipe has light-extraction structure along a first longitudinal side of the luminaire, which is confined to a radial swath of the luminaire, along the longitudinal axis of the luminaire, of substantially less than 180°. For efficiency, the second end has light-saving structure for directing saved light from the second end towards the first end, at redirection angles other than an excluded range of redirection angles, so long as the photon content of light at so-called alpha redirection angles is at least 10 percent of the photon content of light at so-called beta redirection angles, where the excluded range of redirection angles is defined by:|βand |α|<|βwhere βis the beta redirection angle and αis the alpha redirection angle.