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Volume 29 Issue 3
Sep.  2013
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Article Navigation >  LASER TECHNOLOGY  > 2005 >  29(3): 295-296,303

Citation:
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Computer generated hologram of asymmetry franctional Fourier transform

  • 1.

    Physical Teaching and Researching Laboratory, Second Artillery Engineering Institute, Xi'an 710025, China

  • Corresponding author: WANG Hong-xia, redlightw@163.com ; 
  • Received Date: 2004-04-12
    Accepted Date: 2004-06-10
  • A new optical encryption technique based on computer-generated hologram of asymmetry fractional Fourier transform is presented.In this method,the fractional Fourier transform hologram of original object with diff erent orders on axis x and y was coded and ploted into computer-generated hologram.In order to reconstruct the encoded image,special fractional Fourier transform systems with certain orders were needed.Because of its particularity of image reconstruction,it was regarded as a new optical security system and could be used in anti-counterfeiting.Computer simulated results show that this met hod can greatly improve the quality of security and anti-counterfeiting,at the same time practical application is more convenient compared to conventional encr yption technique,hence it has wide application and prospect.
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  • [1]

    FENG Y J,DING J P,ZHOU J et al.Self-focusing matched filter pro-duced by computer-generated hologram [J].Opt Commun,2000,184:89～93.
    [2] 郭永康,黄奇中,杜惊雷et al.分数傅里叶变换全息图及其防伪中的应用 [J].光学学报,1999,19(6):821～825.
    [3]

    MENDLOVIC D,OZAKTAS H M.Fourier transforms and their optical imple mentation:Ⅰ [J].J O S A,1993,A10(9):1875～1881.
    [4]

    DORSCH R G,LOHMANN A W,BITRAN Y et al.Chirp filtering in the fractional Fourier domain [J].Appl Opt,1994,33(32):7599～7602.
    [5]

    MENDLOVIC D,OZAKATAS H M,LOHMANN A W.Fractional correlation [J].Appl Opt,1995,34(2):303～309.
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通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Computer generated hologram of asymmetry franctional Fourier transform

    Corresponding author: WANG Hong-xia, redlightw@163.com; 
  • 1. Physical Teaching and Researching Laboratory, Second Artillery Engineering Institute, Xi'an 710025, China
  • Received Date: 2004-04-12
  • Accepted Date: 2004-06-10
  • Available Online: 2005-05-25

Abstract: A new optical encryption technique based on computer-generated hologram of asymmetry fractional Fourier transform is presented.In this method,the fractional Fourier transform hologram of original object with diff erent orders on axis x and y was coded and ploted into computer-generated hologram.In order to reconstruct the encoded image,special fractional Fourier transform systems with certain orders were needed.Because of its particularity of image reconstruction,it was regarded as a new optical security system and could be used in anti-counterfeiting.Computer simulated results show that this met hod can greatly improve the quality of security and anti-counterfeiting,at the same time practical application is more convenient compared to conventional encr yption technique,hence it has wide application and prospect.

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