Coded holograms for anticounterfeiting using Fourier transform technique on dot-matrix holograms

Shou Liu; Xiangsu Zhang; Chuan Liu; Pengpeng Zhu

doi:10.1117/12.481502

30 August 2002 Coded holograms for anticounterfeiting using Fourier transform technique on dot-matrix holograms

Shou Liu, Xiangsu Zhang, Chuan Liu, Pengpeng Zhu

Proceedings Volume 4924, Holography, Diffractive Optics, and Applications; (2002) https://doi.org/10.1117/12.481502
Event: Photonics Asia, 2002, Shanghai, China

Abstract

A novel technique is proposed to fabricate coded holograms based on dot-matrix holograms for security applicaitons. Fourier transform and inverse Fourier transform are adopted in the coding process. The principle of the coding is to introduce a phase function into the reconstructed wave function of a dot-matrix hologram and record a new hologram. As the result of the coding, the new hologram not only preserves the pattern of the original dot-matrix hologram but also has 3D effect, which is resulted from the phase distribution on the hologram plane. Theoretical analysis and experimental results are presented.

Citation Download Citation

Shou Liu, Xiangsu Zhang, Chuan Liu, and Pengpeng Zhu "Coded holograms for anticounterfeiting using Fourier transform technique on dot-matrix holograms", Proc. SPIE 4924, Holography, Diffractive Optics, and Applications, (30 August 2002); https://doi.org/10.1117/12.481502

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