Deformation mechanism of glass microlenses and microlens arrays in contactless hot embossing

IF 2.1 3区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Glass Science Pub Date : 2024-06-03 DOI:10.1111/ijag.16675

Kang Yang, Jianzhi Li, Feng Gong, Gao Yang

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Abstract

Contactless hot embossing has been demonstrated to possess the potential for cost-effective production and precise mounting concepts in fabricating glass microlenses and microlens arrays due to the reduced difficulty of mold fabrication and the possibility of obtaining self-aligned assemblies. This study aims to provide experimental evidence for understanding the forming mechanism of glass microlenses and microlens arrays in the contactless hot embossing process. The effects of process parameters, diameter and position of the micro-holes, hole diameter, and pitch of the micro-hole array mold on the filling deformation of glass in contactless hot embossing were comprehensively investigated. It is found that placing the micro-hole farther away from the mold center renders decrease in both filling height and tip curvature but increase in the eccentricity of the embossed glass microlens. As a result, the formed glass microlens array shows a nonuniform distribution of filling height and tip curvature. Furthermore, reducing the pitch of micro-hole array mold can significantly improve the uniformity of formed microlens array. Based on these experimental results, the forming mechanism of microlenses and microlens arrays in contactless hot embossing process is summarized. Finally, a glass microlens array with decent uniformity in the center area was hot embossed by using a SiC micro-hole array mold.

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玻璃微透镜和微透镜阵列在非接触式热压印中的变形机理

由于降低了模具制造难度，并有可能获得自对准组件，非接触式热压纹工艺已被证明在制造玻璃微透镜和微透镜阵列方面具有成本效益生产和精确安装概念的潜力。本研究旨在为了解玻璃微透镜和微透镜阵列在非接触式热压凸工艺中的成型机制提供实验证据。研究全面考察了工艺参数、微孔直径和位置、孔径和微孔阵列模具间距对非接触式热压凸工艺中玻璃填充变形的影响。研究发现，将微孔置于离模具中心较远的位置会降低填充高度和顶端曲率，但会增加压印玻璃微透镜的偏心率。因此，形成的玻璃微透镜阵列显示出填充高度和尖端曲率的不均匀分布。此外，减小微孔阵列模具的间距可以明显改善成型微透镜阵列的均匀性。基于这些实验结果，总结了非接触式热压印工艺中微透镜和微透镜阵列的成型机理。最后，使用碳化硅微孔阵列模具热压印出了中心区域均匀性良好的玻璃微透镜阵列。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-

CiteScore

4.50

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.