Light pipe having optimized cross-section
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United States of America Patent
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-
May 3, 1994
Grant Date -
N/A
app pub date -
Mar 31, 1992
filing date -
Mar 31, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A luminaire includes a light pipe having an optical axis. The light pipe includes a tube with a structured outer surface and a smooth inner surface. A reflective light extractor is positioned in the tube such that light reflected by the extractor will strike the tube on a first side. The first side has a contour such that the direction of travel of light reflected by the extractor will have a projection in the plane perpendicular to the optical axis that makes a predetermined angle with the smooth surface.
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Cited Art Landscape
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