光电技术应用, 2016, 31 (2): 57, 网络出版: 2016-06-12  

基于空间带宽积分析的高分辨率快速数字全息重构

High Resolution and Fast Digital Holography Reconstruction Based on Space Bandwidth Product Analysis
作者单位
华南师范大学 信息光电子科技学院, 广州 510006
摘要
为了提高显微数字全息系统的分辨率和重构速度, 从空间带宽积的角度出发, 分析了菲涅尔再现算法的使用范围。结果显示, 记录系统只要满足空间带宽积的条件, 使用菲涅尔再现算法可以同时接近极限分辨率和快速再现;同时, 短记录距离无透镜傅里叶变换光路是一种能满足此空间带宽积条件的系统配置。重要的是, 在短记录距离, 也能用菲涅尔再现算法重构待测物体复振幅。此外, 通过对比细分菲涅尔再现算法和细分卷积算法, 两者的重构分辨率都可以得到提升, 而细分菲涅尔再现算法在大数值孔径的重构中, 所使用的内存和计算时间远远小于细分卷积再现算法。
Abstract
To improve the resolution and the speed of digital holography reconstruction, the space bandwidth product is used to analyze the application range of Fresnel reconstruction algorithm. Analysis results show that once the recording system satisfies the requirements of space bandwidth product, limiting resolution and rapid reconstruction can be obtained by Fresnel reconstruction algorithm. Meanwhile, short recording distance lens-less Fourier transform optical path is one of the configurations satisfying the requirements of space bandwidth product. Importantly, Fresnel reconstruction algorithm still can be used to reconstruct the complex amplitude of the object to be tested at short recording distance. Moreover, through comparing with Fresnel reconstruction algorithm and convolution algorithm, both reconstruction resolutions are improved, and during large value aperture reconstruction, the memory and calculation time required by Fresnel reconstruction algorithm is far lower than that of convolution algorithm.

刘胜德, 吕晓旭, 钟丽云. 基于空间带宽积分析的高分辨率快速数字全息重构[J]. 光电技术应用, 2016, 31(2): 57. LIU Sheng-de, LV Xiao-xu, ZHONG Li-yun. High Resolution and Fast Digital Holography Reconstruction Based on Space Bandwidth Product Analysis[J]. Electro-Optic Technology Application, 2016, 31(2): 57.

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