Automobile headlamp optical system using lens for achieving passing light

Abstract

The invention aims at providing an automobile headlamp optical system using a lens for achieving passing light. Light beams emitted by a light source are reflected by an ellipsoid reflection bowl with the surface plated with aluminum into near parallel light beams, part of light of the parallel light beams is blocked by a metal baffle, the edge of the top end of the metal baffle is made to be in the shape of a light and shade cut-off line, and accordingly the passing light shape regulated by laws and regulations is formed. The light beams are finally refracted by the lens with the outer surface provided with a periodical microstructure array, the microstructure array can change the incidence angle of emitted light of the lens, and therefore the light beams originally emitted in the specific direction are scattered. The microstructure array is distributed in a concave-convex continuous structure, all sections of the concave-convex fluctuant slope surface are machined to be with inconsistent curvature radii, and therefore the emergence angle of each light beam is also changed, the light beams are better scattered, and especially in the light and shade cut-off line part, the original sharp cut-off line becomes smooth.

Description

technical field [0001] The invention relates to the field of designing automobile headlights, in particular to an automobile headlight optical system that uses lenses to realize low beams. Background technique [0002] No matter in which country's automobile headlight regulations, there are clear cut-off lines for low beams. The setting of the cut-off line can allow the driver to better observe the road conditions on the outside of the driving direction, and at the same time reduce the irradiation of the opposite driver and pedestrian on the inside of the driving direction (that is, the side of the opposite car), thereby protecting the driving of the oncoming car Safety and the safety of pedestrians on the road. The cut-off line is the dividing line between the bright area irradiated by the headlight and the dark area not irradiated (or seldom irradiated). The smooth cut-off line can provide the driver with better driving comfort. An overly sharp cut-off line will attract...

AI Technical Summary

Problems solved by technology

At the same time, this process often forms microstructures with irregular shapes, and it is difficult to precisely control the size of the microstructures, which makes it difficult to achieve the desired effect in the regulation of the cut-off line clarity. More importantly, it is impossible to evaluate the surface of the lens through simulation calculations in the early stage. Dealing with impact on cutoffs

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