Optical lens with laser-induced periodic surface microstructure

Abstract

An optical lens with a laser-induced periodic surface microstructure includes an optical lens which is an integrated material and is provided with a surface and a curved surface opposite to the surface. The curved surface of the optical lens is induced by laser so that the curved surface of the optical lens forms a laser-induced periodic surface microstructure. The structural arrangement and the structural size of the laser-induced periodic surface microstructure are as follows: the structural arrangement is that a plurality of structural bodies are periodically arranged, and the structural size is that the structural bodies are separated at intervals of 50nm-1000nm and the height of each structural body is 50nm-500nm.

Description

technical field [0001] The invention relates to an optical lens with a laser-induced periodic surface microstructure, especially a microstructure with approximately periodicity on the curved surface of the optical lens, which makes the optical lens hydrophobic or hydrophilic, or reduces light The reflectance of the curved surface incident on the optical lens, etc., this microstructure is produced by using ultrafast laser light to irradiate the curved surface of the optical lens, or the thin film of the curved surface of the optical lens. Background technique [0002] Form an attachment material on the surface of the optical lens, and then fabricate the micro-nano structure on the attachment material. Usually, the attachment material is a material that is easy to process such as photosensitivity, polymer, or low hardness. It is different from the material of the optical lens to be attached. The practical problem is that there is a difference in the refractive index between th...

AI Technical Summary

Problems solved by technology

The problems of this method include: 1. It is not easy to uniformly coat the photoresist on the curved surface; 2. It is necessary to make a photomask, and it is difficult to perform precise lithography on the curved surface; 3. It is difficult to control the uniformity when etching on the curved surface

Although this method has the opportunity to be implemented on curved surfaces, the greater the curvature of the lens, the greater the difference in etching characteristics from the apex to the edge. At the same time, the arrangement of micro-nano structures is random and the sizes are inconsistent, resulting in uneven distribution of micro-nano structures on the lens. dysfunctional

In summary, although the lithographic etching method can fabricate micro-nano structures on flat substrates, the process is cumbersome and it is extremely difficult to implement on curved surfaces.

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