用二元光学技术制作计算全息波面变换元件

基于计算全息原理与二元光学技术设计制作了应用于机载平视显示器（HUD）中的计算全息波面变换元件，该元件具有较高的衍射效率，一块二元相位型计算全息元件的衍射效率比一般计算全息图的衍射效率提高了四倍，并能产生传统光学元件不能实现的光学波面，如非球面，环状面和锥面等，制作工艺简单，复制简便。

Computer Generated Holography Wavefront-Transforming Element Fabrication by Binary Optical Technique

A computer generated holography (CGH) wavefront transforming element is designed and fabricated based on computer generated hologram and binary optical technique,and is applied in head up display. Its diffraction efficiency is very high. The diffraction efficiency of a two phase CGH is four times higher than that of a general CGH. It can generate special optical wavefront, such as aspheric surface, ring shaped surface, cone shaped surface and so on,which the traditional optical elements can not generate. Moreover, the fabrication and duplication techniques of CGH are simple and convenient.