| 双重分数傅里叶变换计算全息 |
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| 引用本文： | 曾阳素,郭永康,谢世伟,高福华,彭钦军.双重分数傅里叶变换计算全息[J].光学学报,2003,23(2):55-158. |
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| 作者姓名： | 曾阳素 郭永康 谢世伟 高福华 彭钦军 |
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| 作者单位： | 1. 四川大学物理系,成都,610064; 邵阳学院物理系,邵阳,422000
2. 四川大学物理系,成都,610064 |
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| 基金项目： | 国家自然科学基金 ( 6 990 70 0 3)，湖南省教育厅科研基金资助课题。 |
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| 摘 要： | 提出了双重分数傅里叶变换计算全息，在这种方法中，将两个图像的信息分别经不同阶的分数傅里叶变换后，记录在同一张分数傅里叶变换计算全息图上，它需要两个特定的分数傅里叶变换系统才能再现出所记录的图像信息，利用其再现方式的特殊性，可制成一种新的安全认证系统。
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| 关 键 词： | 双重分数傅里叶变换 全息术 计算全息图 安全认证系统 图像处理 |
| 收稿时间： | 2002/6/11 |
Computer-Generated Hologram of Double Franctional Fourier Transform |
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| Zeng Yangsu , Guo Yongkang Xie Shiwei Gao Fuhua Peng Qinjun.Computer-Generated Hologram of Double Franctional Fourier Transform[J].Acta Optica Sinica,2003,23(2):55-158. |
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| Authors: | Zeng Yangsu Guo Yongkang Xie Shiwei Gao Fuhua Peng Qinjun |
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| Institution: | Received 11 June 2002; revised 10 September 2002 |
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| Abstract: | A new optical encryption technique based on computer-generated hologram of double fractional Fourier transform is presented. In this method, the fractional Fourier transform hologram of several images with different orders are respectively recorded on one plate, which means each image has its own fractional order. In order to reconstruct the encoded images, several fractional Fourier transform systems with certain orders are needed. Because of its particularity of image reconstruction, it is regarded as a new optical security system and can be used in anti-counterfeiting. |
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| Keywords: | holography fractional Fourier transform (FRT) computer-generated hologram (CGH) optical security |
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