摘要
基于菲涅耳衍射公式,分析了用球面参考光波记录的全息图条纹的空间频率分布,根据抽样定理以及频谱分离条件,推导得出了球面参考光波数字全息的一般记录条件,并根据实际应用情况得到了几种特殊记录光路的最小记录距离表达式以及参考光源的偏移要求。与现有文献相比,本文所用推导方法既简捷又严格。计算机模拟结果表明:文中结果是正确的;菲涅耳近似法是数值重建全息图的一种非常好的方法;同轴全息再现像的极限分辨率远高于同条件下离轴全息的极限分辨率。
Based on Fresnel diffraction formula, the spatial spectrum distribution d hologram recorded with spherical reference wave is analyzed. By use d the sampling theorem and the condition of spectrum separation, the genetic recording condition of the digital hologram of the spherical reference wave is deduced, and the minimum recording distances and the offsets of the reference wave about some practical and special recording configuration are obtained The deducing method in this paper is more simple and rigorous than others.The computer simulation shows that the results are correct. In addition, the Fresnel approximation is a very good reconstructing method; the very high ultimate reeolution of the reconstructed image can be obtained with in - line lensless Fourier transform digital holography.
出处
《激光杂志》
CAS
CSCD
北大核心
2007年第1期44-46,共3页
Laser Journal
基金
北京市留学人员科技活动择优资助项目
关键词
数字全息
球面参考光波
记录条件
菲涅耳重建法
抽样定理
空间频率
digital holography
spherical reference wave
recording condition
Fresnel reconstruction
sampling theorem
spatial spectrum
