光学学报, 2011, 31 (11): 1109002, 网络出版: 2011-10-24   

波前重建中的高通滤波消零级衍射干扰研究

Eliminaton of the Influence of Zero-Order Diffraction Using Highpass Filter in Wavefront Reconstruction
作者单位
1 昆明理工大学理学院物理系, 云南 昆明 650500
2 浙江大学数学系博士后流动站, 浙江 杭州 310027
3 昆明理工大学建筑工程学院, 云南 昆明 650500
摘要
根据可变放大率物光波前重建过程中球面波照射下数字全息图频谱的分析,提出在重建波照射前对全息图进行高通滤波消零级衍射干扰的方法。对物体表面为散射及非散射面情况的波前重建进行理论模拟及实验研究。结果表明,当物体表面是散射面时,可以获得有效消除干扰的重建图像,但是,当物体表面是光学平滑表面时,为得到完整的重建图像,要求将更为严格。
Abstract
Based on the spectrum analysis of digital hologram illuminated with spherical wave in the course of object wavefront reconstruction with selectable magnification, the method of eliminating the influence of zero-order diffraction is proposed, which uses highpass filter before illuminating hologram with reconstruction wave. The theoretical simulation and experimental result of wavefront reconstruction are given from two aspects: scattering and undiffused light from object surface. The result shows that the interference of the reconstructed image can be eliminated effectively when scattering occurs on the surface. However, when the surface is a smooth plane, much stricter condition should be needed in order to get a completely reconstructed image.
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张亚萍, 张建强, 许蔚, 桂进斌, 楼宇丽, 张永安. 波前重建中的高通滤波消零级衍射干扰研究[J]. 光学学报, 2011, 31(11): 1109002. Zhang Yaping, Zhang Jianqiang, Xu Wei, Gui Jinbin, Lou Yuli, Zhang Yong′an. Eliminaton of the Influence of Zero-Order Diffraction Using Highpass Filter in Wavefront Reconstruction[J]. Acta Optica Sinica, 2011, 31(11): 1109002.

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