| 全息实时检测中零级衍射斑的消除 |
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| 引用本文： | 蔡怀宇 李滢滢 黄战华 王东. 全息实时检测中零级衍射斑的消除[J]. 科学技术与工程, 2007, 7(20): 5221-5223 |
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| 作者姓名： | 蔡怀宇 李滢滢 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： | 在全息流水线检测中,为了保证再现像细节的清晰再现,同时降低全息记录对CCD性能的要求,采用图像相减法消除离轴全息零级衍射斑,并对实际结果进行处理。实验表明,该方法简单快捷,并且在零级像和其他级次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： | 1671-1819(2007)20-5221-03 |
| 修稿时间： | 2007-06-29 |
Elimination of the Zero-order Diffraction Spot in the Reconstruction of the Off-axis Digital Hologram |
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| CAI Huai-yu,LI Ying-ying,HUANG Zhan-hu,WANG Dong. Elimination of the Zero-order Diffraction Spot in the Reconstruction of the Off-axis Digital Hologram[J]. Science Technology and Engineering, 2007, 7(20): 5221-5223 |
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| Authors: | CAI Huai-yu LI Ying-ying HUANG Zhan-hu WANG Dong |
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| Affiliation: | Key Laboratory of Opto-electronic Information Technology Science, EMC College of Precision Instrument and Optoeleetronics Engineering, Tianjin University, Tianjin 300072, P. R. China |
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| Abstract: | To enhance the quality of reconstructed images and reduce the requirement of CCD at the same time,a digital processing method of image-subfraction is proposed for eliminating the influences of the zero-order diffraction spot on the off-axis hologram reconstructed and the reconstructions are implemented successfully by using image subtraction.Reconstructions of hologram without zero-order diffraction spot are implemented successfully.It is proved to be fast and simple,and it is also effective,even if zero-order image and other order images are overlapping.The method can be used in the real time inspection. |
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| Keywords: | digital holography zero-order image image processing |
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