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基于空间光调制器的计算全息成像特性
引用本文:任秀云,程欣,刘轩,韩玉晶,国承山.基于空间光调制器的计算全息成像特性[J].光子学报,2005,34(1):110-113.
作者姓名:任秀云  程欣  刘轩  韩玉晶  国承山
作者单位:山东师范大学物理系,山东,济南,250014
摘    要:把基于高分辨空间光调制器(SLM)的动态计算全息波面变换系统看作一个相干光学成像系统,分析并推导了该系统的点扩展函数(PSF),进而研究了SLM像素结构所引起的固有切趾和展宽效应. 通过计算机模拟考察了SLM填充因子和衍射距离对系统分辨率的影响,给出了满足抽样定理所要求的系统的最小衍射距离. 最后提出了一种消除SLM像素结构影响的物波频谱预处理方法. 这一研究为优化系统设计,完善波面变换系统提供了新的途径.

关 键 词:衍射光学  相干成像  点扩展函数  切趾  填充因子  空间光调制器
收稿时间:2004-07-12
修稿时间:2004年7月12日

Imaging Properties of the Computer-generated Holograms Based on a Spatial Light Modulator
Institution:(Department of Physics,Shandong Normal University, Ji’nan 250014)
Abstract:The dynamic computer-generated holographic imaging system with spatial light modulators (SLM) is considered as a special coherent imaging system, and the point spread function (PSF) of this system is derived. Based on the PSF, the apodization and the enlargement caused by the pixelated SLM are analyzed, and the influences of the fill factor of SLM and the diffraction distance on the resolution of this imaging system are investigated by computer simulation. Moreover, the minimum diffraction distance required for sampling theorem is also considered, and a pretreatment method for eliminating this influence is reported. This works is meaningful to the perfection of this system.
Keywords:Diffractive optics  Point Spread Function  Coherent imaging system  Apodization  Fill factor  Spatial Light Modulator
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