改善数字全息显微术分辨率的几种方法

被引:19
作者
范琦
赵建林
向强
徐莹
陆红强
李继锋
机构
[1] 西北工业大学理学院光信息科学与技术研究所
关键词
数字全息显微术; 分辨率; 数值再现; 无透镜傅里叶变换全息术;
D O I
10.16136/j.joel.2005.02.023
中图分类号
TN26 [];
学科分类号
摘要
从理论和实验上研究了数字全息显微术的分辨率问题。通过分析几种不同数字全息记录光路对记录介质空间分辨率的要求表明,无透镜傅里叶变换全息光路对CCD的空间分辨率要求最低,最能充分利用CCD的带宽;再现像面的空间分辨率在不同方向上的不一致,会导致再现像在空间分辨率高的方向上相对展宽,而在空间分辨率低的方向上相对压缩;再现像的横向分辨率主要由CCD所能记录的物体的最高空间频率决定,它随CCD的尺寸和空间分辨率的提高及记录距离D的减小而提高。给出了消除再现像畸变的方法及实验结果,并提出了3种改善横向分辨率的方法。
引用
收藏
页码:226 / 230
页数:5
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