Optical image encryption based on Fourier ptychography

doi:10.7523/j.issn.2095-6134.2016.05.006

›› 2016, Vol. 33 ›› Issue (5): 612-617.DOI: 10.7523/j.issn.2095-6134.2016.05.006

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Optical image encryption based on Fourier ptychography

XU Wenhui¹, LI Tuo¹, SHI Yishi^1,2

1 University of Chinese Academy of Sciences, Beijing 100049, China;
2 Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China

Received:2015-09-06 Revised:2016-03-26 Online:2016-09-15

Abstract

Abstract:

We propose a method for optical image encryption based on Fourier ptychography (FP).On the basis of 4f double random phase encoding system, the filter aperture (probe) is placed at the Fourier plane, so that the object support constrains for phase retrieval of FP are imposed by the confined optical-transfer-functions in the Fourier domain. Furthermore, we adopt the low numerical aperture objective lens and the variable-angle illumination, which simplifies the device effectively. Numerical simulation results show that the method has the merits of high convergence speed, feasibility, robustness, decryption quality,and security.

Key words: optical image encryption, Fourier ptychography, double random phase encoding

CLC Number:

O438

XU Wenhui, LI Tuo, SHI Yishi. Optical image encryption based on Fourier ptychography[J]. , 2016, 33(5): 612-617.

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Optical image encryption based on Fourier ptychography

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