【作者】 万远红；

【导师】 陈林森；

【作者基本信息】 苏州大学 ， 光学工程， 2010， 硕士

【摘要】 全息照相是利用干涉条纹来记录物体信息的技术,是当前最为重要的三维显示技术之一。本文采用一种新型的全息图制作方法,先对三维物体夫琅禾费传播的波前进行数字化计算,通过相位迭代运算获得三维物体传播后的波前的光场分布(相位分布),计算得来的相位分布输入到空间光位相调制器后,通过光学系统获得三维实像的再现,在再现平面上引入参考光,用光刻胶干板干涉记录得到三维彩虹全息图像。由于空间光调制器单次可输入信息量的限制,本课题采用分区块计算再拼接记录的方法实现完整三维图像的记录。采用计算机运算获得位相分布,无需实物模型,有可能成为三维虚拟的重要方法。本文的主要工作是采用反射型硅基液晶空间光调制器(LCoS)作为图像输入设备,开展光、机、电结合的三维全息图制作研究。文中分析了实现三维全息图的原理,对图像输入设备纯相位反射型硅基液晶空间光调制器(LCoS)的特性进行研究,采用三维软件3Dmax建立三维模型,获取多视角二维数字图片,采用软件对图像进行分色分区块获得狭缝相位编码,设计搭建试验光路制作单色及彩色样品。更多还原

【Abstract】 Holography is a technology to record object information by obtaining its interference patterns. It is one of the most important three-dimensional display technologies currently. In this paper, a new type method of making holograms is used. First compute Fraunhofer distribution of three-dimensional objects with digital method. Optical field distribution (phase distribution) of three-dimensional objects after propagation is got with Iterative Fourier Transform Algorithm (ITFA), then the optical field distribution is inputted to the spatial light modulator, get three-dimensional real image of the object in optical system. Reference light is introduced into the image plane, then record three-dimensional rainbow holograms on photoresist plate. As the limit information of the single input to LCoS, this issue computes segmentation blocks from the pictures, then splice to achieve a complete record of three-dimensional image. Phase distribution obtained by computer calculation, so there is no need in physical model. There may be an important means in three-dimensional virtual.The main work of this article is using Liquid Crystal on Silicon (LCoS) spatial light modulator as an image input device, do some research on making three-dimensional holograms based on optical, mechanical means. Analyze the principle of making three-dimensional holograms. One important job is study the characteristics of the reflective phase-only liquid crystal on silicon spatial light modulator(LCoS), then use a three-dimensional software 3Dmax to build three-dimensional model for multi-angle view 2D digital picture. Software is designed to get slit hologram(phase coding) from color separation and partition the wide 2D pictures into small blocks. Make samples with planed light route, and get colourful three-dimensional hologram samples.更多还原