像面数字全息的重建相位误差分析和改善  

Analysis and improvement of reconstruction phase error in the image plane digital holography

作　　者：石炳川 朱竹青[2] 王晓雷[1] 席思星[1] 贡丽萍 

机构地区：[1]南开大学现代光学研究所,光电信息技术科学教育部重点实验室,天津300071 [2]南京师范大学物理与科学技术学院,江苏省光电技术重点实验室,南京210046

出　　处：《物理学报》2014年第24期207-214,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61275133)资助的课题~~

摘　　要：像面数字全息是数字全息技术中常用的测量和成像方式,它通常采用离散傅里叶变换和频率滤波的方法进行物光波的重建.本文讨论了这些算法对重建相位的影响.首先分析了频谱泄露对于相位误差的影响,结果表明当采样周期为整数时,重建相位误差很小,因此具有极高的相位重建精度;而当不满足整周期采样时,相位重建误差有了明显的增加.为了改善频谱泄露所引起的相位误差,采用Hanning函数对数字全息图进行了预处理,结果表明Hanning窗的加入能够有效地提高重建相位的准确程度.The image plane digital holography is commonly used in digital holographic measurement and imaging. The methods of the discrete Fourier transform and the frequency filtering are usually used for reconstructing the object wave in image plane digital holography, and the influence of these algorithms on phase reconstruction is discussed in this paper. Firstly, the influence of the frequency spectrum leakage on phase reconstruction error is analyzed. The results show that the error of the phase reconstruction is very small when the sampling periodicity is an integer, so high accuracy of phase reconstruction can be achieved in this case. But when the sampling periodicity is not an integer, the phase reconstruction error is increased obviously. In order to reduce the phase error caused by the frequency spectrum leakage, the Hanning window is used in the pretreatment of the digital hologram. The result shows that the Hanning window can improve the accuracy of the reconstruction phase effectively.

关 键 词：像面数字全息 相位重建误差 频谱泄露 HANNING窗 

分 类 号：O438.1[机械工程—光学工程]