Laser searchlight

Abstract

The invention provides a laser searchlight. The laser searchlight comprises a laser diode, a transflective mirror, a first focusing lens group, a second focusing lens group, a phosphor layer, a scattering layer, a first light emitting lens, a second light emitting lens, a distance detection device and a laser adjustment device. Lasers output by the laser diode serve as incident laser beams, the incident laser beams are split into two beams by the transflective mirror, one beam of the lasers is focused onto the phosphor layer by the first focusing lens group, and the other beam of the lasers is focused onto the scattering layer by the second focusing lens group; and fluorescent light output from the phosphor layer and the lasers reflected by the scattering layer are mixed to form the final output light. The distance detection device detects the distance of the front irradiated object in real time, and when the distance is smaller than the safety distance, the output light intensity is adjusted or laser output is turned off through the laser adjustment device. According to the structure of the laser searchlight, the light intensity can be lowered automatically during short-distance irradiation, and the situation that the human eyes are erroneously illuminated, and the personal safety is endangered is prevented.

Description

technical field [0001] The invention relates to the field of lighting, in particular to the field of special lighting using laser lighting. Background technique [0002] At present, LED light sources are replacing traditional incandescent lamps and energy-saving lamps as a new type of lighting source, but the brightness of LEDs is limited. In some special applications that require high-brightness light sources, such as stage lighting, car headlights, projection displays, etc. , LED can not meet the requirements. Semiconductor laser diodes with the same source as LEDs also have the advantages of high efficiency, energy saving, environmental protection, and long life. Using laser excitation phosphor technology (remote phosphor technology) can obtain ultra-high brightness point light sources, which can be used in some special lighting field. [0003] Laser-excited phosphor technology is to focus the laser on the phosphor layer to form a point light source with a small luminou...

AI Technical Summary

Problems solved by technology

The divergence angle of the beam of the laser searchlight is usually within 1°, so it can form an irradiation distance of several kilometers. When illuminating at a short distance, due to the small divergence angle, the beam energy is concentrated. Blindness or even permanent blindness, resulting in personal injury

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