Efficient light injector
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United States of America Patent
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Nov 3, 2009
Grant Date -
Sep 25, 2008
app pub date -
Mar 19, 2007
filing date -
Mar 19, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A light injector includes a tapered solid light guide having a light input end, an opposing light output end, and a total internal reflection surface defining a longitudinal outer surface there between. The light input end includes an aperture extending into the tapered solid light guide defined by an aperture surface. A specularly reflective layer or film is disposed adjacent to the total internal reflection surface. A distance between the specularly reflective layer or film and the total internal reflection surface defines a first air gap. The aperture is configured to accept a lambertian light source.
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