微透镜阵列出瞳扩展全色激光扫描显示方法研究

项目名称： 微透镜阵列出瞳扩展全色激光扫描显示方法研究

项目编号： No.61505241

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李敏

作者单位： 中国科学院苏州纳米技术与纳米仿生研究所

项目金额： 20万元

中文摘要： 激光为光源的视网膜扫描显示具有小体积、低功耗、高分辨率、大色域、高亮度等优点，成为头盔显示中一项最新且具有革命性的技术，但是，由于受到MEMS振镜转角和尺寸乘积的限制，出瞳仅有几个毫米，难以应用到头盔显示中。本项目拟采用微透镜阵列衍射光学元件扩展激光扫描显示的出瞳，实现全色、大出瞳显示，克服普通出瞳扩展光学元件对波长的强烈依赖性。为此，利用菲涅耳衍射积分和傅里叶变换方法，建立双微透镜阵列和视网膜扫描显示的光束传输物理模型、出瞳光场分布计算模型，探讨影响双微透镜阵列输出光强分布及视网膜扫描显示出瞳大小的因素，解决高填充比、高均匀性微透镜阵列制备技术问题，建立高精度双微透镜阵列对准检测系统。实现基于微透镜阵列的全色激光扫描显示，满足头盔显示大出瞳、全色、高亮度均匀性等要求，为激光扫描显示（头盔显示的图像源）的发展和应用提供理论基础。

中文关键词： 微透镜阵列；出瞳扩展；激光扫描显示

英文摘要： Retinal Scanning Display (RSD) as a revolutionary technology has been used in hand-held or head-worn devices, as it has many advantages, such as small volume, low power consumption, high resolution, large color gamut, and high brightness. However, the exit pupil of laser scanning display is only a few mm, which is limited by the factor αD of MEMS mirror. These make RSD difficult to be applied in helmet-mounted display. In this proposal, we try to present a new method to expand the exit pupil by using the Dual Micro-Lens Arrays (DMLA) as diffraction optical element. The method can overcome the dependence on wavelength. In order to analyze the optical field distribution from DMLA and RSD, the physical model is established, which is based on Fresnel diffraction integral and Fourier transform principles. Many problems in fabrication process of micro-lens arrays with high filling ratio, high uniformity will be solved. The measurement setup will be designed to align and bond two identical micro-lens arrays. Finally, full-color RSD with DMLA will be optimized to satisfy the requirement of helmet-mount display, such as large exit pupil, full-color and high brightness uniform. All the done in this project will provide theoretical basis for the development and application of full-color RSD with DMLA.

英文关键词： micro-lens arrays;exit pupil expander;laser scanning display