| 一种消除数字离轴全息零级像的实验方法 |
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| 引用本文： | 吕且妮,葛宝臻,张以谟.一种消除数字离轴全息零级像的实验方法[J].光子学报,2004,33(8):1014-1017. |
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| 作者姓名： | 吕且妮 葛宝臻 张以谟 |
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| 作者单位： | 天津大学精仪学院、光电信息技术科学教育部重点实验室,天津,300072 |
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| 基金项目： | 高温高密度等离子体物理国防科技重点实验室基金资助项目 (5 14 80 0 30 2 0 3ZW0 80 3)，国家自然科学基金资助项目(No .6 0 0 770 2 8) |
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| 摘 要： | 提出一种消除数字离轴全息零级像的实验方法.这种方法是将全息衍射光栅作为分光元件,形成数字离轴全息记录系统,通过调节记录光路系统中平面镜,改变物光波到达CCD的入射方向而引入相移,从而得到不同记录参数的全息图.再通过对不同记录参数全息图的数字处理,即可达到零级像消除的目的,并对这种方法进行了理论分析和实验验证.给出了利用这种方法获得的实验结果.实验结果证明了该方案的可行性,并且具有光路系统简单、操作和处理容易等特点.
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| 关 键 词： | 数字离轴全息术 数字再现 零级像消除 |
| 收稿时间： | 2004-01-16 |
| 修稿时间： | 2004年1月16日 |
An Experimental Method of Eliminating Zero-order Diffraction in Digital Off-axis Holography |
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| Institution: | (College of Optoelectronics & Precision Instrument Engineering,Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education,Tianjin University,Tianjin 300072) |
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| Abstract: | An experimental method of eliminating zero-order diffraction in the reconstructed image of off-axis digital holography is presented. Holographic diffraction grating acts as a beam splitter,and an off-axis holography system is formed. The holograms of object with different recording parameters are obtained by adjusting reflecting mirror in recording optical system to vary incidence orientation of the object beam in CCD to introduce phase shift. The zero-order image can be eliminated by numerically processed the hologram of object with different recording parameters. The theoretical analysis has been done in detail,and the experimental results are also given. The experimental results show that the method presented in this paper is feasible,simple in optical structure and easy in operation and data processing. |
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| Keywords: | Digital off-axis holography Numerical reconstruction Eliminating zero-order diffraction |
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