Infrared laser lamp device for uniformly illuminating road surface

Abstract

An infrared laser lamp device for uniformly illuminating a road surface belongs to the field of semiconductor illumination and comprises a driving circuit board, a fan, a mechanically packaged shell, a semiconductor laser tube and a lens. Optical fibers are adhered on the surface of the semiconductor laser tube, after the angle of light emitted from the semiconductor laser tube is shaped by the optical fibers, fast axis light is compressed to form a rectangular light spot, wherein a fast axis diffusion angle of the rectangular light spot is 10 degrees while a slow axis diffusion angle of the rectangular light spot is 8 degrees, and after receiving the rectangular light spot, the lens uniformly projects the light to the ground in the distance. The lens with a free curved surface distributes energy of laser light beams, is designed according to an energy corresponding mode, and can guarantee that the energy is uniform in a road surface illumination range under the condition that an illuminator is placed horizontally. The laser illuminator with a free curved surface is simple in adjustment process, and only needs to be placed horizontally, a downward pitching angle does not need to be adjusted, the light beams can naturally deflect downwards to illuminate the road surface, adjustment time is shortened, and installation cost is lowered.

Description

technical field [0001] The invention belongs to the field of semiconductor lighting, and relates to an infrared laser lamp device for uniform road surface illumination. Background technique [0002] With the improvement of the performance of semiconductor lasers, laser lighting technology based on semiconductor lasers is more and more widely used in the field of safety protection monitoring. Especially in some scenarios where the road surface is monitored within a certain distance, it is required to be able to uniformly and effectively illuminate the road surface that needs to be monitored, so as to detect abnormalities on the road surface in time, such as stones on the airport runway surface that affect the aircraft’s take-off and landing. Objects, etc. that interfere with the driving of the vehicle appear. [0003] At present, the commonly used method is to tilt the laser illuminator to the road surface at a certain angle, so that the light irradiates the road surface. H...

AI Technical Summary

Problems solved by technology

However, this method requires repeated adjustments on site. At the same time, the energy in the irradiation range is uneven, bright in the near area, and dark in the distance. In order to take into account the distance, the near area is often too bright, which affects the image quality.

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