Laser lighting device and application thereof
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United States of America Patent
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May 23, 2017
Issued Date -
N/A
app pub date -
Dec 9, 2014
filing date -
Dec 9, 2014
priority date (Note) -
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Abstract
A laser lighting device provides a broad range illumination for an area, such as a smoke filled space, a hallway or an underwater environment with certain turbidity. This lighting device contains a laser diode as a light source and a diffraction grating that is able to diffract an input laser light beam generated from the laser diode into a plurality of output laser light beams with the cross section of the plurality of output laser light beams forming a pattern comprising a plurality of light spots. In addition, this pattern may be in a donut shape. That is to say, the power of a light spot formed by a zero order light beam is lower than other light spots' power. Further, this laser lighting device is used to provide lighting with depth perception and forward visibility.
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