Laser headlight, illumination system and laser safety protection method thereof

Abstract

The invention relates to a laser headlight, an illumination system and a laser safety protection method thereof. The laser headlight is provided with a polarization beam splitting prism, wherein a laser light source is arranged on an incident surface of the polarization beam splitting prism, and a reflector is arranged on a light transmission path of the polarization beam splitting prism. The laser generated by the laser light source is converted into white light by a fluorescent layer and then irradiated to the polarization beam splitting prism, wherein P polarized light in the white light isirradiated to the reflector through the polarization beam splitting prism and is reflected by the reflector and then irradiated to a road surface to form illumination. If a phosphor layer of a fluorescent screen falls off or is broken down by the laser, the non-converted laser is radiated to the polarization beam splitting prism directly. The laser, as S polarized light, is reflected totally by the polarization beam splitting prism, which avoids the laser radiating to the road surface through the reflector and causing damage to pedestrians, and achieves the passive safety protection. The laser safety protection method solves the problem that the laser headlight causes damage to human eyes due to laser leakage caused by the damage of the fluorescent layer.

Description

technical field [0001] The invention relates to the safety protection of laser headlights, in particular to a laser headlight, its lighting system, and a laser safety protection method. Background technique [0002] With the development of light source technology, laser, as a brand new light source, has gradually entered the automobile market. Due to the high brightness of laser and the good collimation performance of laser light source itself, it is popular in the market. At present, lasers are used as light sources to make high beams and auxiliary high beam lamps appear on the market. However, the use of laser as a special light source requires extra attention. According to the description of national regulations, Class 3B and Class 4 lasers may cause permanent damage to human eyes. Improper use will cause harm to pedestrians and oncoming drivers . [0003] Such as figure 1 , when the high-energy beam generated by the external force or the laser breaks and breaks down t...

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Problems solved by technology

[0005] The object of the present invention is to provide a laser headlight and its lighting system, and laser safety protection method. The present invention sets a polarization beam splitter prism in the laser headlight to realize passive safety protection when the laser leaks, and sets a light leakage monitoring device to realize laser leakage. Timely active safety protection to solve the problem of laser headlights causing damage to human eyes due to laser leakage caused by damage to the fluorescent layer

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