Preparation of high precision aspherical lenses based on micro stereolithography technology

TL;DR

This paper presents a novel DLP 3D printing method for high-precision aspherical lenses, utilizing an inert liquid fluoride isolation layer and a vertical lifting immersion technique to improve surface quality and prevent adhesion issues.

Contribution

It introduces a new DLP 3D printing process with an inert fluoride solution and vertical lifting immersion to enhance optical lens fabrication.

Findings

Effective prevention of adhesion to the printing window.

Reduction of step effects on lens surfaces.

Successful fabrication of high-precision aspherical lenses.

Abstract

The 3D printing technology based on digital light processing (DLP) has highlighted its powerful manufacturing capabilities for optical components. However, the printing structure obtained by DLP based down projection printing is easily adhered to the printing window below, and the printed lens surface will have a step effect. This article uses DLP 3D printing technology to print non spherical lenses. During the printing process, a new type of inert liquid fluoride solution was used as the isolation layer, which can more effectively and conveniently prevent the printing structure from sticking to the printing window. At the same time, a vertical lifting immersion method was proposed to smooth the step effect on the surface of the lens.