Implementation of image encoding and decoding with computer-generated hologram of fractional Fourier transform

Yongkang Guo; Yangsu Zeng; Shiwei Xie; Fuhua Gao; Jianhua Zhu; Yixiao Zhang; Qinjun Peng; Jinglei Du; Jin Zhang

doi:10.1117/12.481526

30 August 2002 Implementation of image encoding and decoding with computer-generated hologram of fractional Fourier transform

Yongkang Guo, Yangsu Zeng, Shiwei Xie, Fuhua Gao, Jianhua Zhu, Yixiao Zhang, Qinjun Peng, Jinglei Du, Jin Zhang

Author Affiliations +

Proceedings Volume 4924, Holography, Diffractive Optics, and Applications; (2002) https://doi.org/10.1117/12.481526
Event: Photonics Asia, 2002, Shanghai, China

Abstract

A new method is presented to encode and decode images with computer-generated hologram of fractional Fourier transform. The fractional Fourier transform computer-generated holograms (FRT-CGH) of several objects with different orders are respectively recorded on one holographic plate. In order to reconstruct images of the objects, several fractional Fourier transform systems of certain orders are needed. This method is agile and convenient on design and fabrication. It can be encoded and decoded either by numerical method or by optical method. Because of its particularity of image reconstruction, FRT-CGH is regarded as a new optical security system and may be widely used in the future.

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Yongkang Guo, Yangsu Zeng, Shiwei Xie, Fuhua Gao, Jianhua Zhu, Yixiao Zhang, Qinjun Peng, Jinglei Du, and Jin Zhang "Implementation of image encoding and decoding with computer-generated hologram of fractional Fourier transform", Proc. SPIE 4924, Holography, Diffractive Optics, and Applications, (30 August 2002); https://doi.org/10.1117/12.481526

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