共查询到19条相似文献,搜索用时 46 毫秒
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用二元光学技术制作计算全息波面变换元件 总被引:6,自引:3,他引:6
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。 相似文献
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用改进的两步模拟退火法进行二元光学元件的设计 总被引:2,自引:1,他引:2
为了减少二元光学元件设计的计算量并提高设计精度,在对现有算法机理进行深入分析的基础上,提出了适用于二元光学元件设计的两步模拟退火法.该算法在整个退火过程中采用先量化后优化的策略,并将优化过程分为两个阶段:搜索并锁定最优解区间;快速收敛到最优解.模拟实验显示,与传统设计方法相比,该算法不仅保持了全局寻优的特点,而且提高了稳健性和效率.算法剔除了对设计结果影响较大的量化误差,提高了设计精度.用此法实例设计了单焦面辐射聚焦元件,得到了与目标图像一致的光学实验结果. 相似文献
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二元光学元件的偏振特性研究孙炳全,毛文炜(抚顺石油学院113001)(清华大学精仪系100084)二元光学是基于衍射理论而发展起来的新学科,是光学与微电子技术互相渗透、交叉而形成的前沿课题[1-2].二元光学元件的性能分析及测试技术是二元光学发展中关... 相似文献
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二元光学元件衍射效率的逐层分析法研究 总被引:5,自引:0,他引:5
提出了一种有效的分析二元光学元件衍射效率的新方法-逐层分析法,并对四台阶二元器件,就蚀刻深度误差和横向对准误差对器件衍射效率的影响进行了详细的分析和讨论,证明了用该方法分析含有横向对准误差的二元光学元件的衍射效率非常简便有效。 相似文献
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The most promising 3D display technology lies in holographic display system. Kinform, whose theoretical diffraction efficiency is 100%, is the promising type of hologram. It is found that one of the greatest obstacles to the practical application of kinoform is the computational speed. A new model to increase the computational speed is proposed to solve the problem. In the proposed model named horizontal parallax only (HPO) kinoform, the vertical parallax is omitted because the human visual system cannot perceive the vertical parallax. Therefore, the computational speed for HPO kinform is many times faster than that for full parallax kinform. In this paper, both the theoretical basis and the experimental results of HPO kinoform are discussed. 相似文献
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Research for Horizontal Parallax Only Kinoform in 3D Display 总被引:5,自引:0,他引:5
1 Introduction Theholographicdisplay ,withwhichtheobjectwavefrontcanberecordedandreconstructed ,isthepromisingtechnologyfor3Ddisplay .Generally ,thediffractionefficiencyofhologramsislowowingtothezeroorderandotherhigherorderdiffractionoftheholograms.Onthe… 相似文献
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二元光学波面变形器件的研究 总被引:4,自引:0,他引:4
基于计算全息原理设计了二元光学波面变形器件,一块二元光学器件的衍射效率比计算全息可提高4倍,高斯波面整形需要二块整形光学器件,二元光学器件的激光利用率比计算全息提高16倍,而且制做工艺简单. 相似文献
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二元光学元件制作误差分析与模拟 总被引:12,自引:1,他引:12
从标量衍射理论出发,首先从理论上计算出多台阶二元化学元件发生深度误差时衍射效率的解析式,然后以4台阶和8台阶闪耀光栅为例,对二元光学元件套刻制作中的主要误差及其这些误差之间的相互影响进行了系统的分析和计算机模拟研究,模拟结果给实际制作提供了重要理论指导和实验参数。 相似文献
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Design of the Optimum Holographic Optical Element Lens Using the Hologram Computer-Aided Design Tool
A hologram CAD (computer-aided design) tool capable of designing holographic optical element (HOE) is described. We have been developing this tool which is specialized for holograms. An optimum HOE lens with high diffraction efficiency and diffraction limited imaging characteristics is designed with the tool by applying a computer generated hologram (CGH) which generates an aspherical wave. The imaging characteristics of the HOE lens are experimentally verified and desirable results are obtained.This paper was originally presented at the 2nd International Conference on Optical Design and Fabrication, ODF2000 which was held on November 15-17, 2000 at the International Conference Center, Tokyo, Waseda University, Japan. 相似文献
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本文基于新近提出的计算全息透镜制备原理,对柱面透镜和圆锥透铁相息图作了计算。该方法的优点是当这类全息光学元件的有关参数发生变化时能进行灵活调整,无须进行重新设计。 相似文献
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A method of simulated annealing in optimization of a computer generated holo-gram(CGH)is presented.The characteristics of energy in annealing curve are analyzed.Thecooling schedule such as giving an initial temperature,the temperature function,the numberof interactions and stopping criterion are discussed.As an example,an optimization of phaserelief kinoform,a CGH with multiple phase levels,is implemented. 相似文献