Determination of displacement derivative in digital holographic interferometry

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

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
Volume282
Issue number5
DOIs
Publication statusPublished - 1 Mar 2009
Externally publishedYes

Keywords

  • 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

Cite this