光学学报, 2003, 23 (2): 155, 网络出版: 2006-06-27
双重分数傅里叶变换计算全息
Computer-Generated Hologram of Double Franctional Fourier Transform
全息术 分数傅里叶变换 计算全息图 光学安全 holography fractional Fourier transform (FRT) computer-generated hologram (CGH) optical security
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。
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.
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): 155. 曾阳素, 郭永康, 谢世伟, 高福华, 彭钦军. Computer-Generated Hologram of Double Franctional Fourier Transform[J]. Acta Optica Sinica, 2003, 23(2): 155.