VARIABLE-BEAM LIGHT SOURCE AND RELATED METHODS
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United States of America Patent
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Sep 24, 2013
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Sep 24, 2012
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Abstract
Light sources with arrangements of multiple LEDs (or other light-emitting devices) disposed at or near the focus of a reflecting optic and controllable individually or in groups facilitate varying the angular distribution of the light beam (e.g., the beam divergence) via the drive currents supplied to the LEDs.
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