Research on spectrum image encryption and anti-cou

  • Detail

Research on spectrum image encryption and anti-counterfeiting in holographic printing (VIII)

Chapter 5 Conclusion

according to the Fourier transform of the lens, a transparent image (secret mark) located on the front focal plane of the lens can obtain the spectrum of the image on the rear focal plane after Fourier transform and focus on a small area near the focus, so the encrypted pattern can be Fourier transformed, The spectrum is cleverly recorded in a certain position of the rainbow hologram and displayed in some optical form of the image. However, due to the difference between the holographic recording of passwords and the making of ordinary holograms: the method of replacing steel with light materials in shipbuilding is different, and it is difficult for peers to infer the mathematical model of the original object and its manufacturing method from the displayed optical image. Therefore, the spectrum characteristics can be summarized as follows:

① the spatial distribution form of the object wave spectrum is completely different

now follow the author's steps to analyze 1. ② it is difficult to infer the form of the object wave from the image of the spectrum, so we cannot know the shape of the object that produces the spectrum. Therefore, using optical means to make Fourier spectrum as an encrypted password on the hologram will effectively strengthen the anti-counterfeiting performance of holographic printing images

conclusion of Chapter 6

in the whole process of writing this article, we have received the careful guidance of Professor Yang Gao. Here we only express our heartfelt thanks. In addition, due to the limitations of time, personal level and other factors, the deficiencies and even fallacies in the article are inevitable. Please criticize and correct them more


[1] Wang Qixiang: principles of Engineering Optics, Jiangsu Science Press, 1981

[2] Yang Gao, Zhong Zehui: Research on laser holographic anti-counterfeiting encryption, packaging engineering, 1997 (6)

[3] Wang Shixuan, Xu Chuanfeng: two encryption devices for rainbow hologram anti-counterfeiting identification, laser magazine, 1993 (4)

[4] Xu Xin, Yang Gao: printing applied optics, printing industry press, 1999 first edition

[5] Yang Fuxin, Wu Longqi: anti-counterfeiting packaging technology, machinery industry press, 1999 first edition

[6] Xu Shenglin: application and Prospect of foreign anti-counterfeiting technology, Beijing Anxin anti-counterfeiting technology development Co., Ltd., 2002

[7] Chen Xingwu, Zhao Huiying, etc.: computer generation and reproduction of color holography, optical technology, 2003 (2)

[8] Guo Yongkang, Huang Qizhong, et al.: fractional Fourier transform hologram and its application in anti-counterfeiting, Acta optica Sinica, 1999 (6)

[9] Xiong Bingheng: holographic printing technology, exchange of technical experience, 1994 (2)

[10] Huang Wanyun: Fourier optics course, Beijing Normal University Press, 1990

[11] Matsushita AKI (Japan): principle and experiment of holography, Science Press, 1983

[12] Liu Shou and others: a new technology to improve the performance of laser holographic anti-counterfeiting identification -- encryption, China packaging, 1996 (1)

[13] Xu Daxiong: practical holography, Beijing Institute of Posts and Telecommunications Press, 1985

[14] Xu Daxiong: the update of anti-counterfeiting holographic technology, successfully completed the work of temperature measurement, sampling and so on with high risk coefficient, printing technology, 2000 (1)

[15] Liu Bing: the application of laser holographic anti-counterfeiting technology in packaging and printing, printing technology, 2001 (27)

[16] Tan Junqiao: the formation and development of China's anti-counterfeiting technology industry, printing today 2002 (3)

[17] Zhang Yanchen: the development trend and key technologies of anti-counterfeiting technology, printing technology, 2001 approved by the National Bureau of quality and technical supervision (30) (27)

[18] Liu Zhengqing: overview of anti-counterfeiting printing technology, printing today, 2002 (3)

Copyright © 2011 JIN SHI