Lens, light-emitting device having the lens, and visual notification appliance
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United States of America Patent
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Jan 2, 2018
Issued Date -
N/A
app pub date -
Sep 29, 2016
filing date -
Sep 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A lens, a light-emitting device having a lens, and a visual notification appliance are disclosed. The lens may be substantially in the shape of a cap, and may include a substantially flat bottom surface, and a substantially cross-shaped recess sunken into the bottom surface, the recess providing orthogonal cross-arms, the optical source being adapted to be disposed in a cavity formed by the recess and capable of aligning with a crossing center of the cross-arms, and the recess being arranged so that more light incident upon an internal surface of the recess is refracted to the directions of the cross-arms than to the directions between the cross-arms.
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