Optical double-image cryptography based on diffractive imaging with a laterally-translated phase grating

Wen Chen, Xudong Chen, Colin J.R. Sheppard

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)

Abstract

In this paper, we propose a method using structured-illumination-based diffractive imaging with a laterally- translated phase grating for optical double-image cryptography. An optical cryptosystem is designed, and multiple random phase-only masks are placed in the optical path. When a phase grating is laterally translated just before the plaintexts, several diffraction intensity patterns (i.e., ciphertexts) can be correspondingly obtained. During image decryption, an iterative retrieval algorithm is developed to extract plaintexts from the ciphertexts. In addition, security and advantages of the proposed method are analyzed. Feasibility and effectiveness of the proposed method are demonstrated by numerical simulation results.
Original languageEnglish
Pages (from-to)5750-5757
Number of pages8
JournalApplied Optics
Volume50
Issue number29
DOIs
Publication statusPublished - 10 Oct 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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