Asymmetric TIR lenses producing off-axis beams
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United States of America Patent
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Aug 2, 2005
Grant Date -
Jun 3, 2004
app pub date -
Jul 18, 2003
filing date -
Dec 2, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to an improvement of a total internal reflection lens whereby a tilted symmetry axis leads to a net deflection of the output beam away from the surface normal of the exit surface. Linear TIR lenses have a net deflection transverse to their focal strip. Circular TIR lens profiles going beyond 90° are tilted to bring the rim level with the source, the deflected rays exiting the lens to form an off-axis beam.
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