基于电场驱动喷射微3D打印的大面积微透镜阵列制造研究

大面积圆形、柱状及梯度折射率微透镜阵列在裸眼3D、光学传感、仿生学、医疗内窥镜等领域具有非常广泛的需求，然而，如何实现大面积多类型微透镜阵列的简单化、低成本、高效率制造是学术界与产业界共同面临的一项挑战性难题。基于电场驱动喷射微3D打印技术，提出了一种可实现大面积多类型微透镜阵列制备的新方法，通过实验揭示了主要工艺参数（电压、气压，打印速度）对制备的不同类型微透镜形貌与质量的影响与规律，利用提出的方法并结合优化的工艺参数，在玻璃基底上分别实现了面积为120 mm×120 mm、100 cm×45 cm的圆形与柱状微透镜阵列的制造，在柔性PET基底上实现了面积为160 mm×160 mm的圆形微透镜阵列的制造，利用电场驱动喷射微3D打印的多层打印模式实现了折射率梯度变化范围为0.1的梯度折射率微透镜阵列的制造。实验结果表明，制备的微透镜阵列具有良好的几何与光学性能，基于电场驱动喷射微3D打印大面积、多类型微透镜阵列制造方法具有效率高、成本低、批量化的显著优势，为大面积多类型微透镜阵列制造提供了一种全新的解决方案。

Fabrication of Larger-area Microlenses Arrays Based on Electric-field-driven Jet Micro-scale 3D Printing Technology

Large-area circular, cylindrical and gradient index microlens arrays (MLAs) have a wide range of applications in naked-eye 3D, optical sensing, bionics and medical endoscopes. However, simplification, low-cost, and high-efficiency manufacturing of large-area and multi-type MLAs still remains challenges in academia and industry. A novel large-area and multi-type MLAs fabrication method based on electric-field-driven jet micro-scale 3D printing technology is proposed. A series of experiments are conducted to reveal the influence law of process parameters (driving voltage, air pressure, printing speed) for the fabricated MLAs with different types. As results, the success fabrication of circular MLA with area of 120 mm×120 mm and cylindrical MLA with area of 100 cm×45 cm on glass substrates can be achieved easily via the proposed method and the optimized process parameters. Large area circular MLA can also be fabricated on flexible PET substrate with printing area of 160 mm×160 mm. Moreover, the fabrication of gradient index MLAs with the gradient of refractive index of 0.1 can be realized through multi-layer printing mode of electric-field-driven jet micro-scale 3D printing. All the fabricated large-area MLAs have good geometric and optical properties. The proposed technique is a promising novel tool for the inexpensive and widely-suited fabrication method of large area and multi-type MLAs, which provides a brand-new solution for MLA manufacturing.