Lightguide with horizontal cutoff and horizontal spread
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United States of America Patent
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Jan 10, 2017
Grant Date -
Mar 24, 2016
app pub date -
Dec 1, 2015
filing date -
Mar 14, 2013
priority date (Note) -
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Abstract
An automotive lightguide includes a main guide portion with a light entrance surface and a reflective rear edge surface; and an exit lens joined to the main guide portion, the exit lens having an exit surface with an arcuate exit profile. In use, light rays from a light source enter the main guide portion through an entrance surface, travel through the main guide portion and reflect off the rear edge surface to the exit lens which images the reflected light rays as a light beam pattern having a predetermined sharp horizontal cutoff and a predetermined horizontal spread, the arcuate profile of the rear edge surface determining the horizontal cutoff and vertical spread of the light beam pattern with respect to the horizontal optical axis H-H, and the exit profile of the exit lens determining the horizontal spread of the light beam pattern.
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