Determination of displacement derivative in digital holographic interferometry

C. Quan, C. J. Tay, Wen Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


Digital holography (DH) and digital shearography (DS) both play an important role in non-destructive evaluation. In this paper, a novel method based on digital holographic interferometry (DHI) and complex phasor (CP) is proposed to determine displacement derivative. An algorithm is employed to filter the imaginary and real parts of complex values without the need of direct phase manipulation. Two-dimensional short time Fourier transform (STFT) is employed subsequently to process wrapped phase maps. An experiment is conducted to demonstrate the validity of the proposed method.
Original languageEnglish
Pages (from-to)809-815
Number of pages7
JournalOptics Communications
Issue number5
Publication statusPublished - 1 Mar 2009
Externally publishedYes


  • Complex phasor (CP)
  • Digital holographic interferometry (DHI)
  • Displacement derivative
  • Short time Fourier transform (STFT)

ASJC Scopus subject areas

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


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