| 离轴全息数字再现中零级衍射斑的消除 |
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| 引用本文： | 李滢滢,蔡怀宇,黄战华,王东.离轴全息数字再现中零级衍射斑的消除[J].南华大学学报(自然科学版),2007,21(2):98-101. |
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| 作者姓名： | 李滢滢 蔡怀宇 黄战华 王东 |
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| 作者单位： | 天津大学,精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津,300072 |
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| 摘 要： | 为了保证再现像清晰的细节再现,同时降低全息记录对CCD的要求,本文提出一种基于图像相减的消除离轴全息零级衍射斑的方法,同时用计算机模拟实验.结果表明,该方法简单快捷,即使在零级像和共轭像严重重叠的情况下,也能较好地消除零级像的影响.因此可用于全息的实时检测,且不会造成信息丢失.
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| 关 键 词： | 数字全息 零级像 图像处理 |
| 文章编号： | 1673-0062（2007）02-0098-04 |
| 收稿时间： | 2007-04-23 |
| 修稿时间： | 2007-04-23 |
The Elimination of the Zero-order Diffraction Spot in the Reconstruction of the Off-axis Digital Hologram |
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| LI Ying-ying,CAI Huai-yu,HUANG Zhan-hu,WANG Dong.The Elimination of the Zero-order Diffraction Spot in the Reconstruction of the Off-axis Digital Hologram[J].Journal of Nanhua University:Science and Technology,2007,21(2):98-101. |
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| Authors: | LI Ying-ying CAI Huai-yu HUANG Zhan-hu WANG Dong |
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| Institution: | Key Laboratory of Opto - electronic Information Technology Science, EMC. College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | To enhance the quality of reconstructed images and reduce the requirement of CCD at the same time,we propose a digital processing method for eliminating the influences of the zero-order diffraction spot on the reconstructed image of off-axis digital hologram using image subtraction.Reconstructions of hologram without zero-order diffraction spot are implemented successfully.It is proved to be fast and simple,and can eliminate the zero-order diffraction effectively,even if zero-order image and conjugate image is overlapping.It can be used in the real time inspection. |
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| Keywords: | digital holography zero-order image image processing |
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