Design method of thick-wall part optical system comprising diffusion hole for eliminating dark area at chamfer

Abstract

The invention provides a design method of a thick-wall part optical system comprising a diffusion hole for eliminating a dark area at a chamfer. According to the design method, a collimation hole of an existing thick-wall part is changed into a diffusion hole, or a collimation surface is changed into a diffusion surface; by means of the scattering effect of the diffusion hole and the diffusion surface on light, the area, caused by chamfering, of a dark area of the original collimation hole is covered with the light scattered by the diffusion hole, the coverage of the dark area is obtained through accurate calculation of earlier-stage design, and therefore the problems of the dark area and non-uniformity of a conventional optical structure can be well improved and solved. Through the designof combining the primary theory and simulation fine adjustment in the earlier stage, the design result is more accurate, additional design or process adjustment in the later stage is not needed, andthe mold feasibility is further greatly improved; and the final optical effect is more controllable and more uniform.

Description

technical field [0001] The invention relates to the technical field of automobile lamp lighting, in particular to a design method of an optical system of a thick-walled part including diffusion holes for eliminating dark areas at chamfers. Background technique [0002] At present, it is very common to use thick-walled parts as the optical system of car lights, but based on the precision limitation of the current manufacturing process, all thick-walled parts need to have a certain chamfer at the edge position of the opening position to meet the processing requirements. The openings are usually collimation holes with collimation effect to collimate the light incident on the collimation hole from all directions into parallel light to achieve uniform output. However, on the one hand, the edge position of the opening position above The chamfer of the chamfer will cause defects in the collimation system. The light hitting the chamfer will be refracted or hit other areas, but it wi...

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a design method for the optical system of the thick-walled part that includes the diffusion hole that eliminates the dark area at the chamfer, by changing the collimation hole of the existing thick-walled part to Diffusion hole, or changing the collimation surface to a diffusion surface, through the diffusion hole and the diffusion surface to disperse the light, so that the area of ​​the dark area caused by the chamfering of the original collimation hole is covered by the light scattered by the diffusion hole , and the coverage of the dark area is obtained through the precise calculation of the previous design, so it can well improve and solve the problem of dark area and unevenness of the conventional optical structure

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