| 提高数字全息再现像像质的两步相移迭代算法 |
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| 引用本文： | 吴友朋,刘祥萱,王红霞. 提高数字全息再现像像质的两步相移迭代算法[J]. 光学学报, 2008, 28(12): 2292-2295 |
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| 作者姓名： | 吴友朋 刘祥萱 王红霞 |
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| 作者单位： | 1. 西安高科技研究所503教研室,陕西,西安,710025
2. 西安高科技研究所物理教研室,陕西,西安,710025 |
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| 摘 要： | 在两步相移数字全息术中,相移误差直接影响着零级像和共轭像的消除.为了消除相移误差,获得实际相移值,提出了一种基于相位统计特性的两步相移迭代算法.首先利用全息图的相位统计特性计算出初始相移值,然后用数字全息图再现像抽样点强度偏差之和作为评价标准,通过迭代计算寻找参考光的真正相移值.该算法能对任意未知相移量进行提取,从而有效地消除零级像和共轭像,提高了再现像质量.理论分析和光学实验结果证明了该方法的可行性和有效性.
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| 关 键 词： | 数字全息 两步相移 相移误差 迭代算法 数字再现 |
| 收稿时间： | 2008-03-17 |
Two-Step Phase-Shifting Iterative Algorithm of Improving Quality of Reconstructed Image in Digital Holography |
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| Wu Youpeng,Liu Xiangxuan,Wang Hongxia. Two-Step Phase-Shifting Iterative Algorithm of Improving Quality of Reconstructed Image in Digital Holography[J]. Acta Optica Sinica, 2008, 28(12): 2292-2295 |
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| Authors: | Wu Youpeng Liu Xiangxuan Wang Hongxia |
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| Affiliation: | Wu Youpeng1 Liu Xiangxuan1 Wang Hongxia21503 Staff Room,Xi'an High Technology Studio,Xi'an,Shaanxi 710025,China2Physic Staff Room,China |
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| Abstract: | In two-step phase-shifting digital holography,the elimination of the zero-order image and conjugate image is directly affected by the phase-shifting error. To eliminate the phase-shifting error and obtain the actual phase-shifting value,the two-step phase-shifting iterative algorithm is presented,based on the statistic property of the phase distribution of the diffraction field in recorded plane. In this method,the initial phase-shifting value is calculated directly from the holograms,and then the sum of th... |
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| Keywords: | digital holography two-step phase-shifting phase-shifting error iterative algorithm numerical reconstruction |
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