一种透明全息投影显示屏的研制

Development of a Transparent Holographic Projection Display Screen

研制了一种透明平面全息显示屏。显示屏由全息像素组成,每一个像素都基于散斑的像面全息结构,其中基元光栅起到调制入射光并定向衍射成像的作用。分析了显示屏的视场特性,对不同的参物比对显示屏衍射效率的影响进行了测量和分析。全息显示屏具有高亮度和消色散的优点,浮雕型结构便于进行大幅面的快速微纳米压印复制,使得所提出的显示屏具有低成本的工艺优势。

A type of transparent holographic projection screen is developed and demonstrated in this paper. The holographic screen is composed of pixels, which are produced by the speckle holographic patterns. The input illumination is diffracted by the grating structure in each pixel and diffracted directionally to reconstruct image observed on the holographic plane. Theoretical analysis on the field of view is given and diffraction efficiencies with different ratio of intensity of reference and object beam is measured. The proposed holographic screen has the advantages of high brightness and achromatism. Furthermore, the micro-surface-relief can be manufactured by the nano-imprint technology efficiently and cost-effectively.