Method for segmented manufacturing of super-large aperture Fresnel lens

Abstract

The invention discloses a method for segmentally manufacturing an ultra-large-diameter Fresnel lens, and relates to the field of Fresnel lens manufacturing and processing. Specifically, it includes the following steps: Determine the diameter of the ultra-large-diameter Fresnel lens; Divide the ultra-large-diameter Fresnel lens to be produced into several annular zones; Determine the number of spliced ​​bodies on each annular zone; According to the maximum cone that can be processed The size of the big end of the roller and the position of the annular belt; determine the taper and size of the tapered roller; use the tapered roller to make partial Fresnel lenses, that is, individual spliced ​​bodies; splice the partial Fresnel lenses, that is, spliced ​​bodies, into a complete Fresnel lens. The invention can manufacture large-sized and ultra-large-sized Fresnel lenses, and ensures the accuracy of microstructure molding.

Description

technical field [0001] The invention relates to the field of Fresnel lens manufacturing and processing, in particular to a method for segmentally manufacturing super-large-diameter Fresnel lenses. Background technique [0002] Fresnel lens is an annular optical lens invented by a French physicist. With the advancement of technology, the demand for product size is increasing, and the application field is becoming more and more extensive. Especially in laser TV screens, solar photovoltaic photothermal applications, laser engineering applications and other major aspects. Lenses are made bigger and bigger. The manufacture of large aperture lenses has always been a worldwide problem. This patent is an expansion of technological innovation based on the invention patent of the independent patent ZL201410170440.1 "Tapered Roller for Making Fresnel Lenses", which can manufacture larger-sized Fresnel lenses. [0003] The 500-meter-diameter radio telescope made in China undoubtedly ...

AI Technical Summary

Problems solved by technology

[0003] The 500-meter-diameter radio telescope made in China undoubtedly marks that my country is already in the forefront of the world in the manufacturing technology of large telescopes. However, the multi-prism splicing technology it uses is very important for the manufacture of each single prism and the splicing of multiple prisms. worldwide problem

In the manufacturing process, the requirements for prism manufacturing accuracy and splicing accuracy are very high, and the manufacturing cost is also huge, which restricts the development of the application field

This patent proposes a method for producing Fresnel lenses based on tapered rollers. On the one hand, it can replace the prism in the super large telescope and can also be used in the manufacture of laser TV screens - pumping lasers, solar photovoltaics, photothermal and other fields. At the same time, it breaks the traditional process of Fresnel lens using disc mold hot pressing molding. The size of Fresnel lens manufactured by this method is very limited, which greatly limits the application of Fresnel optical lens

The traditional disc lens mold cannot manufacture large size, let alone super large size.

Another challenge is the absence of large or very large molding equipment

The larger the size, the more difficult it is to guarantee the precision of microstructure forming

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