汤树海,陈琳轶,陈广学.基于微纳米压印的微透镜阵列光学膜制造研究[J].包装工程,2024,45(1):101-110.
TANG Shuhai,CHEN Linyi,CHEN Guangxue.Manufacturing of Microlens Array Optical Film Based on Micro-nano Imprinting[J].Packaging Engineering,2024,45(1):101-110. |
| 基于微纳米压印的微透镜阵列光学膜制造研究 |
| Manufacturing of Microlens Array Optical Film Based on Micro-nano Imprinting |
| 投稿时间：2023-08-20 |
| DOI：10.19554/j.cnki.1001-3563.2024.01.012 |
| 中文关键词: 微透镜阵列 微纳米压印 光学膜 3D显示 |
| 英文关键词: microlens array micro-nano imprinting optical film 3D display |
| 基金项目:2021年广东省科技专项资金大专项+任务清单(210719155863891);深圳职业技术学院2022年度青年创新项目(6022310025K) |
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| 中文摘要: |
| 目的 实现裸眼3D显示效果的承印基材是微透镜阵列光学膜，本文旨在研究制造微透镜阵列光学膜的方法及在制造过程中的影响因素。方法 采用卷对卷的UV-LED光固化微纳米压印工艺，通过定制化的微纳米压印模具，规模化制造正六角形孔径、蜂窝排布的微透镜阵列光学膜。结果 文中所用的PET膜表面粗糙度均方差约为0.083 μm，可见光波段的透光率为90%~93%，具有良好的表面平整度和较高的透光率，有利于微透镜阵列的成型制造和光学膜优良光学性能的呈现;UV-LED紫外压印光刻胶具有较低的黏度(250 Pa.s，25 ℃)、良好的界面性能(接触角为93°)和较小的固化体积收缩率(3.5%)，有利于光刻胶对模具凹槽的填充及微透镜阵列的成型和脱模。对于微纳米压印制造过程，要选择合适的压印力，既要确保光刻胶能够充分地填充模具凹槽，又要避免微透镜阵列的结构受挤压变形而导致损坏模具。当压印速度控制在5~7 m/min时，微透镜阵列的复型精度较高且成型质量较为稳定，不会出现气泡缺陷和拉断缺陷。结论 卷对卷的UV-LED光固化微纳米压印工艺是一种制造微透镜阵列光学膜行之有效的方法。 |
| 英文摘要: |
| Microlens array optical film is a printing substrate for achieving naked-eye 3D display effect. The work aims to study the methods of fabricating optical films for microlens arrays and the factors affecting them during fabrication. Roll-to-roll UV-LED light-cured micro-nano imprinting process was used to scale up the manufacturing of optical films with positive hexagonal apertures and honeycomb rows of microlens arrays through customized micro-nano imprinting molds. The PET film used had good surface smoothness and high transmittance, whose mean square error of surface roughness was about 0.083 μm, and the transmittance in the visible light band was about 90%-93%. So the PET film used was conducive to the formation and manufacturing of microlens arrays and the presentation of excellent optical properties of the optical film. The UV-LED imprinting photoresist used had low viscosity (250 Pa.s, 25 oC), good interface performance (contact angle 93o), and small curing volume shrinkage (3.5%), which was conducive to the filling of mold groove by the photoresist and the formation and demolding of microlens array. For the micro-nano imprinting manufacturing process, appropriate imprinting force should be selected to ensure that the photoresist could fully fill the mold grooves, but also to avoid damage to the mold due to extrusion and deformation of the structure of the microlens array. When the imprinting speed was controlled at 5-7 m/min, the replica precision of the microlens array was higher and the molding quality was more stable, and bubble defects and pull-off defects would not occur. The roll-to-roll UV-LED light-cured micro-nano imprinting process is a well-established method for fabricating optical films for microlens arrays. |
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