Lin Ding-Zheng, Lee Ching-Ming, Zhang Zi-Jain, Yu Ping-Hung, Jeng Jeng-Ywan
Opt Express. 2022 Apr 25;30(9):14759-14769. doi: 10.1364/OE.454018.
3D printing techniques have great potential in the direct fabrication of microfluidic and many kinds of molds, such as dental and jewelry models. However, the resolution, surface roughness, and critical dimension uniformity of 3D printing objects are still a challenge for improvement. In this article, we proposed a 405nm light emitting diode (LED) backlight module based on stacks of structured films, and the full width half maximum (FWHM) of the angular distribution of this module is reduced to less than ± 15°. Compared with the commercial lens array optical module, the ten points intensity uniformity of an 8.9" build area is improved from 56% to 80%. Moreover, we found that the surface roughness and the sharpness of the edge of the printing objects are also obviously improved by our novel quasi-collimated LED backlight module. These features give us a promising way for the application of microfluidics and micro-optics components in the future.
3D打印技术在直接制造微流体以及多种模具（如牙科和珠宝模型）方面具有巨大潜力。然而，3D打印物体的分辨率、表面粗糙度和关键尺寸均匀性仍是有待改进的挑战。在本文中，我们提出了一种基于结构化薄膜堆叠的405nm发光二极管（LED）背光模块，该模块角分布的半高宽（FWHM）减小至小于±15°。与商用透镜阵列光学模块相比，8.9英寸构建区域的十点强度均匀性从56%提高到了80%。此外，我们发现，我们新颖的准直LED背光模块还显著改善了打印物体的表面粗糙度和边缘清晰度。这些特性为微流体和微光学组件在未来的应用提供了一条很有前景的途径。
