Curved fly's-eye lens and preparation method thereof

Abstract

The invention provides a curved fly's-eye lens and a preparation method thereof. The curved fly's-eye lens comprises an upper concave surface and a lower concave surface, light vertically enters from the upper part of the concave surface of the curved fly's-eye lens and is transmitted to the lower concave surface from the upper concave surface; the lower concave surface is provided with sub-eye lenses, transmission light rays at different angles pass through the optical center of each stage of sub-eye lens, and then the focus of each stage of fly's-eye lens falls on the plane of the detector. The micro-lens pattern on the silicon wafer substrate is transferred to the polymer layer by adopting the hot-pressing process, the pressure is uniformly applied to the surface of the polymer, the sub-eye vector height is uniform, and the size of the sub-eye vector height can be controlled by controlling the preset hot-pressing thickness; the curvature radius of the deformation of the film is accurately controlled according to the linear relationship between the deformation of the PDMS film and the atmospheric pressure; the lens is prepared by adopting an ultraviolet curing process, the time is short, the efficiency is high, the repeatability is good, and the surface appearance is uniform; the variable-curvature quartz glass is adopted, and the meniscus fly's-eye lens is prepared during ultraviolet curing, so that the influence of spherical aberration and aberration is reduced, and the resolution is improved.

Description

technical field [0001] The invention relates to the field of micromachining, in particular to a curved fly-eye lens and a preparation method thereof. Background technique [0002] In recent years, artificial bionic compound eyes have attracted more and more researchers' attention because of their large field of view imaging, high sensitivity to moving objects, and compact structure. Artificial bionic compound eyes have become a brand-new discipline in the field of high-tech, and have been widely used in many fields such as military, communication, industry, information industry, medicine, construction industry and scientific research. Traditional optical imaging systems usually use lens groups for imaging. There are many lenses, large volumes, and complex structures, making it difficult to integrate and integrate with various miniaturized systems. Therefore, artificial compound eyes have great potential application value in military, aviation and other fields. [0003] In ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned mainstream process methods have the following problems: long processing cycle, high cost, uncontrollable curvature of curved fly-eye lens, low repeatability, poor consistency of sub-eye shape

Since each unit must be controlled separately, this method is not suitable for preparing small units and large-area array structures. The compound eye has large limitations and high requirements on the structure, which increases the design and manufacturing costs.

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