摘要

在对合成孔径数字全息图通过分幅数值重建的过程中,数值重建平面中心的改变将会影响子全息图再现像的位置及相位分布,进而会对最终得到的合成数值再现像的质量产生不利影响。针对合成孔径数字无透镜傅里叶变换全息图,在理论分析的基础上,提出了相应的分幅再现算法。根据相应子全息图在合成孔径全息图平面上的位置,给各分幅数值再现像分别乘以相应的相位修正因子后再进行叠加,可得到准确的合成数值再现像。以采用线阵CCD推扫获得的大幅面数字无透镜傅里叶变换全息图为例,按照所述方法进行了分幅数值重建实验,获得了高质量的准确合成数值再现像。实验结果与理论分析一致。

Abstract

During the numerical reconstruction process of synthetic aperture hologram by use of screen-division method,the center change of the digital reconstruction plane will influence the positions and the phase distributions of the corresponding reconstructed images from the sub-holograms,which will affect the quality of the synthetic numerical reconstruction image. For synthetic aperture digital lensless Fourier transform hologram,a screen-division reconstruction method is proposed based on theoretical analysis. It is pointed out that,in order to get the accurate synthetic numerical reconstruction image,the sub-reconstructed images should multiply with the phase correction factor according to the position of the corresponding sub-holograms on the synthetic aperture hologram plane and then be superposed. Taking the digital lensless Fourier transform hologram with large area acquired by use of linear CCD push-broom technology as example,the screen-division numerical reconstruction experiment is conducted according to the proposed method,and accurate synthetic numerical reconstruction image with high quality is acquired. The experimental result is consistent with the theoretical analysis.

补充资料

中图分类号：TBB77

DOI：10.3788/aos20092912.3304

所属栏目：傅里叶光学与光信号处理

基金项目：航空科学基金(2006ZD53042)资助课题。

收稿日期：2009-01-07

修改稿日期：2009-02-13

网络出版日期：0001-01-01

作者单位    点击查看

联系人作者：姜宏振(jianghz2003@sina.com)

备注：姜宏振|主要从事数字全息技术方面的研究|(1984-),男,博士研究生。

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引用该论文

Jiang Hongzhen,Zhao Jianlin,Di Jianglei,Qin Chuan,Yan Xiaobo,Sun Weiwei. Reconstruction of Synthetic Aperture Digital Lensless Fourier Transform Hologram by Use of the Screen-Division Method[J]. Acta Optica Sinica, 2009, 29(12): 3304-3309

姜宏振,赵建林,邸江磊,秦川,闫晓博,孙伟伟. 合成孔径数字无透镜傅里叶变换全息图的分幅再现[J]. 光学学报, 2009, 29(12): 3304-3309

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