Research on Encryption and Anti-Counterfeiting by Spectrum Image Method in Holographic Printing(I)

Abstract: There are many anti-counterfeiting methods in holographic printing. However, according to the two-step rainbow holographic principle, through the Fourier transform property of the lens, the enciphering that requires encryption is Fourier transformed, and its spectrum is ingeniously recorded in a certain position of the rainbow hologram to achieve the purpose of encryption. Can make other people unable to control, so that the holographic printing in the encryption and anti-counterfeiting more originality and superiority, so it has a wider application prospects.
Keywords: Rainbow Holography, Fourier Transform, Encryption, Anti-counterfeiting. Introduction Holographic printing is a new printing technology that integrates laser, holography, electrochemistry, and precision mechanics. It can copy large-volume prints of holographic images with three-dimensional and brilliant colors. Holographic technology can not only record the strength information of an object, but also record the phase information of the object; therefore, someone calls it "3D Printing for the 21st Century".
Spectral image method encryption in holographic printing expresses and reproduces the information of objects in a Fourier transformed spectral language. Different object information has different spectra after Fourier transform, and the spectrum and the shape of the object are completely different. It is also difficult to infer the shape of the object from the reproduced spectrum image; at the same time, the encrypted dark marks are recorded on the basis of the two-step rainbow hologram. On the second hologram.

ABSTRACT

There are many anti-counterfeiting methods in holographic printing. Through Fourier transform the frequency of the secret mark which need a cryptographic security can be recorded in someplace of color hologram according as the two step color hologram principle what achieve a purpose of encrypting. So holographic Printing has more comprehensive attached future for its original creation and superiority.

Key words: color hologram, Fourier tansform, cryptographic security, anti-counterfeiting

table of Contents

Chapter 1 Holographic Principles 1.1 Recording Principles 1.2 Reproducing Principles Chapter 2 Two-Step Rainbow Holography Principle 2.1 The First Step: Making Master Holograms with Off-axis Holography 2.2 Step 2: Adding slits Rainbow hologram Chapter 3 Spectrum Encryption Principle Chapter 4 Experimental Design and Discussion 4.1 Experimental Instruments and Equipment 4.2 Spectral Darkening Pre-Production with Two-Step Rainbow Holography 4.2.1 Making Master Hologram 4.2.2 Making two-step rainbow hologram 4.3 Design and experiment of holographic spectral secret light path 4.4 Analysis of experimental results 4.4.1 Experiment notes 4.4.2 Experiment analysis 4.4.3 Experiment summary Chapter 5 Conclusion Chapter 6 Conclusion