Title:
EFFICIENT LUMINAIRE WITH DIRECTIONAL SIDE-LIGHT EXTRACTION
Document Type and Number:
WIPO Patent Application WO2005102003
Kind Code:
B1
Abstract:
A luminaire with directional side-light extraction comprises a light pipe (20) with a light carrying core. The light pipe has light-extraction structure (30) 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 (42a) 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 direction angles.
Inventors:
CASSARLY WILLIAM J (US)
DAVENPORT THOMAS L R (US)
DAVENPORT JOHN M (US)
JENSON CHRIS H (US)
DAVENPORT THOMAS L R (US)
DAVENPORT JOHN M (US)
JENSON CHRIS H (US)
Application Number:
PCT/US2005/013156
Publication Date:
January 18, 2007
Filing Date:
April 18, 2005
Export Citation:
Assignee:
FIBERSTARS INC (US)
OPTICAL RES ASSOCIATES (US)
CASSARLY WILLIAM J (US)
DAVENPORT THOMAS L R (US)
DAVENPORT JOHN M (US)
JENSON CHRIS H (US)
OPTICAL RES ASSOCIATES (US)
CASSARLY WILLIAM J (US)
DAVENPORT THOMAS L R (US)
DAVENPORT JOHN M (US)
JENSON CHRIS H (US)
International Classes:
F21V13/04; F21V7/00; F21V8/00; F21Y101/00
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