Structured-illumination-based lensless diffractive imaging and its application to optical image encryption

Wen Chen, Xudong Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)


In this paper, we propose a new method in the structured-illumination-based lensless diffractive imaging using variable grating pitches. When a phase grating pitch is sequentially changed, a series of diffraction patterns can be recorded by a charge-coupled device (CCD) camera. Subsequently, a phase retrieval algorithm with a rapid convergence rate is developed to recover a high-quality object from the recorded diffraction patterns. The proposed method is further applied to optical image encryption, and simulation results are presented to demonstrate validity of the proposed method.
Original languageEnglish
Pages (from-to)2044-2047
Number of pages4
JournalOptics Communications
Issue number8
Publication statusPublished - 15 Apr 2012
Externally publishedYes


  • Lensless diffractive imaging
  • Optical image encryption
  • Security analysis
  • Structured illumination
  • Virtual optics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry


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