波导型准直投影系统中的超级衍射光栅技术研究

项目名称： 波导型准直投影系统中的超级衍射光栅技术研究

项目编号： No.61475113

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 黄战华

作者单位： 天津大学

项目金额： 82万元

中文摘要： 波导型准直投影平视器是军用战机中最新一代头盔/抬头显示器(HMD/HUD),应用于国际最先进的战机中。该系统利用波导折叠空间光路，内嵌超级衍射光栅改变全反射条件，使光束进入观察范围，因此可获得小体积、轻质量、大出瞳等优异的光学性能。系统中超级衍射光栅是核心器件，但是尚未有资料披露其理论、性能、结构、参数等细节，以及实际制作工艺与理论优化的对应关系。本项目分析波导型准直投影系统中超级衍射光栅的性能需求，明确其性能参数；设计超级衍射光栅，研究其光学性能，明确结构参数和光学性能之间的关系，并建立光栅优化模型；设计模拟计算软件，基于严格耦合波理论，采用矢量边界理论讨论光栅的衍射特性，完成波导型准直投影系统中，任意光学条件下，计算超级衍射光栅特性的工程软件；综合考虑优化结果和实际加工工艺，制作超级衍射光栅样品，并应用于波导型准直投影系统中，实验测量并论证分析系统的光学特性。

中文关键词： 波导型准直投影平视器；头盔/抬头显示器；严格耦合波理论；亚波长衍射光栅

英文摘要： The waveguide collimated projection system is the latest generation of HMD/HUD. In order to save space and increase the exit pupil diameter, the waveguide collimated projection system folds space with optical waveguides. The embedded diffraction grating would diffract beam into viewing area by TIR condition damage. The Super diffraction grating plays critical role in the system but no details were disclosed such as performance, structure, parameters, etc., especially the relationship between actual production and theoretical optimization. The project analyzes the performance requirements of the waveguide type collimator projection technology super diffraction grating, specifies parameters of super diffraction grating in the waveguide collimator projection system, design super diffraction grating, studies the optical properties in the waveguide projection system, specifies the relationship between the structural parameters and the optical properties, builds the optimization model; designs simulation software based on rigorous coupled-wave theory, discusses diffraction characteristics with vector boundary theory, to analyze super diffraction gratings under any conditions; considering the optimization results and the actual process, makes samples and applies in the waveguide collimator projection system to get experimental measurement and optical analysis in the system.

英文关键词： Waveguide holographic display device;helmet/head-up display;rigorous coupled-wave analysis;sub-wavelength diffraction grating