Method for obtaining Fresnel lens lines

Abstract

The embodiment of the invention provides a method for obtaining Fresnel lens lines. The method comprises a step of filling moulded materials at the lines of a Fresnel lens, and obtaining a moulded body with lines, a step of sectioning the moulded body along the line center of the moulded body, and obtaining the section lines of the Fresnel lens, a step of amplifying the section lines and obtaining the amplified line patterns of the section lines, and a step of rotating the line patterns of the section lines and obtaining the Fresnel lens lines. Through the above method, the Fresnel lens lines can be accurately obtained, the method is simple and efficient, and the cost is low. After the Fresnel lens lines are obtained, the optical simulation check can be carried out so as to evaluate the optical simulation design report of a supplier, the investigation of a problem is facilitated, the efficiency is improved, and the cost is reduced. After the Fresnel lens lines are obtained, an optical test effect can be previewed and validated so as to improve the efficiency and accuracy. At the same time, the supplier can be suggested to modify the design so as to be compatible with reasonable manufacturing tolerances, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of electronic equipment, in particular to a method for obtaining Fresnel lens lines. Background technique [0002] At present, mobile terminals (smart phones, tablet computers, etc.) on the market are generally equipped with cameras and flashlights, and the main function of the flashlights is to provide light for shooting. In the prior art, in order to improve the shooting quality, a Fresnel lens is generally arranged above the flashlight, and the light-gathering characteristics of the Fresnel lens are used to improve the lighting effect of the flashlight. Specifically, the Fresnel lens pattern is set toward the flashlight, and the light emitted by the flashlight can be transmitted through the Fresnel lens pattern, and the light emitted by the Fresnel lens is projected to the outside; during this process, the Fresnel lens pattern The function of is mainly to concentrate the light outside the lens angle range into the...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the size of the Fresnel lens is very small, it is transparent, and its texture design is complicated, and the minimum fillet of the texture is about 0.03mm, which is generally designed and developed by the supplier.

However, in the actual production process, suppliers generally do not provide accurate 3D drawings (that is, provide modified 3D drawings or do not provide 3D drawings), but only provide optical simulation design reports for Fresnel lenses (this report generally does very beautiful); therefore, as a mobile terminal manufacturer, it is difficult to effectively supervise the optical performance of the Fresnel lens

Specifically, it can be reflected as follows: in the process of assembly and testing of the mobile terminal, if there is a problem in the optical test, is there a problem with the design tolerance of the Fresnel lens? Or is there a flaw in the design of the Fresnel lens? Or is there a flaw in the structure of the mobile terminal? Or is there a problem with the manufacturing tolerances of the mobile terminal? If the above factors are checked one by one, it will not only take a lot of time, but also require a lot of manpower and material resources, resulting in low production efficiency and increased production costs.

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