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 。
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 pixilated 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.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第1期110-113,共4页
Acta Photonica Sinica
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
Diffractive optics
Point Spread Function
Coherent imaging system
Apodization
Fill factor
Spatial Light Modulator
