Asymmetric alternating prism arrays
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United States of America Patent
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Feb 15, 2005
Grant Date -
Nov 15, 2001
app pub date -
Nov 29, 2000
filing date -
Dec 2, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A luminaire is provided which includes a light source, a light guide that receives light radiating from the light source, and a plurality of prisms adjacent the light guide that redirect the light from the light guide substantially perpendicular to a longitudinal axis of the light guide. The prism angles, in one embodiment, are 25.degree.-90.degree.-65.degree.. The fine pitch prism arrays preferably alternate or flip-flop every few millimeters, for example, one to two millimeters to create the visual appearance of bright and dark bands which cause the structure to appear like macro prisms.
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