COLLIMATOR AND PORTABLE LIGHTING DEVICE
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United States of America Patent
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Issued Date -
Apr 18, 2024
app pub date -
Mar 15, 2022
filing date -
Apr 8, 2021
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Abstract
A collimator (1) for collimating light uses a plurality of optical surfaces each forming optical boundary surfaces with a change in the optical density. The collimator (1) has a substantially flat light entry surface (2), a convex light exit surface (4) and a totally reflective side wall (3) connecting the light entry surface (2) to the light exit surface (4). A portable lighting device is provided having such a collimator. In order to provide a collimator and a portable lighting device having a collimator which achieves a better light distribution, the light exit surface of the collimator has light-refracting structures (5).
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