LENS DEVICE AND ILLUMINATION APPARATUS HAVING THE SAME
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United States of America Patent
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Issued Date -
Oct 29, 2009
app pub date -
Apr 24, 2008
filing date -
Apr 24, 2008
priority date (Note) -
Abandoned
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Abstract
A lens device used for an LED package includes a base portion, and a refracting portion formed on the top face of the base portion. A recess corresponding to the refracting portion is formed on the bottom face of the base portion. At least one notch connecting with the recess is also formed on the bottom face of the base portion. A surface of refracting portion is provided as a non-spherical convex surface. An indent is formed on the center of the non-spherical convex surface. The light emitted from the LED package is directed toward lateral side, and the angular intensity distribution has an asymmetrical batwing shape, so as to obtain an illuminating apparatus with uniformly illumination.
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