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提出一种全息平面显示屏的设计和制作方法。显示屏由全息像素单元组成,每一个像素单元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,数值模拟了记录参考光不同入射角度和起限制垂直方向视场作用的狭缝的宽度对再现散斑像的影响。制作出幅面大小为600 mm×800 mm(约40″),厚度为1.5 mm的普通投影全息显示屏,给出相应的制作流程和制作参数。结果表明,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。
Proposed a holographic flat screen design and production methods. The display consists of holographic pixel units, each of which is based on a speckle-like image-side holographic structure, where the elementary grating functions to modulate incident light and direct diffraction imaging. The field of view of the display screen is analyzed. The effect of the width of the slit recording the reference incident light at different incident angles and the vertical field of view limiting the effect on the speckle images is numerically simulated. The general projection holographic display with the size of 600 mm × 800 mm (about 40 ") and the thickness of 1.5 mm was made, and the corresponding fabrication process and fabrication parameters were given.The results showed that the holographic display had high brightness and anti-chromatic dispersion The advantage of the embossed structure facilitates fast, micro-nano imprint replication of large format, rendering the proposed display a low-cost process advantage.