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| 数字全息图变频采样研究 | |
| 引用本文： | 蔡晓鸥,王辉,李勇.数字全息图变频采样研究[J].光子学报,2004,33(4):481-484. |
| 作者姓名： | 蔡晓鸥 王辉 李勇 |
| 作者单位： | 1. 温州师范学院物理与电子信息学院,浙江温州,325003 2. 浙江师范大学信息光学研究所,金华,321004 |
| 摘 要： | 根据Whittaker-Shannon抽样定理,对菲涅耳全息图进行变频率采样,保证整个全息图各部分采样频率为该处相应空间频率的两倍,从而完全消除数字全息图由于采样冗余而带来全息图的信息冗余.并且,对变频采样后的全息图进行线性插值恢复即可获得良好的再现像质.实验和理论均证明了该方法的有效性和可行性,为全息图的信息存贮与传输提出一条新的思路. |
| 关 键 词： | 数字全息图 变频采样 空间频率 Whittaker-Shannon抽样定理 |
| 收稿时间： | 2003-09-02 |
| 修稿时间： | 2003年9月2日 |
Study on Digital Hologram of Frequency-change Sampling |
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.Study on Digital Hologram of Frequency-change Sampling[J].Acta Photonica Sinica,2004,33(4):481-484. |
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| Authors: | |
| Institution: | (1 Physics and Electronic Information College, Wenzhou Normal College, Wenzhou, Zhejiang, China, 325003) (2 Institute of Information Optics, Zhejiang Normal University, Jinhua 321004) |
| Abstract: | Based on the sampling theorem of Whittaker Shannon, Fresnel hologram has been Frequency change sampled ensuring that the sampling frequency is twice as much as the corresponding spatial frequency of the hologram. In the way, the sampling redundancy that will cause the information redundancy of digital hologram has been eliminated. Further more, a good reconstructed image can be acquired from restoration hologram by linear interpolation. The feasibility and efficiency of the method are confirmed by theoretical analysis and experimental results. So a new thought has been offered for the information storage and transmission of computer generated hologram. |
| Keywords: | Digital hologram Frequency change sampling Spatial frequency Sampling theorem of whittaker shannon |
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