Determination of displacement derivative in digital holographic interferometry

C. Quan; C. J. Tay; Wen Chen

doi:10.1016/j.optcom.2008.11.056

Determination of displacement derivative in digital holographic interferometry

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

Research output: Journal article publication › Journal article › Academic research › peer-review

40 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 language	English
Pages (from-to)	809-815
Number of pages	7
Journal	Optics Communications
Volume	282
Issue number	5
DOIs	https://doi.org/10.1016/j.optcom.2008.11.056
Publication status	Published - 1 Mar 2009
Externally published	Yes

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

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10.1016/j.optcom.2008.11.056

Cite this

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AB - 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.

KW - Complex phasor (CP)

KW - Digital holographic interferometry (DHI)

KW - Displacement derivative

KW - Short time Fourier transform (STFT)

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JO - Optics Communications

JF - Optics Communications

IS - 5

ER -

Determination of displacement derivative in digital holographic interferometry

Abstract

Keywords

ASJC Scopus subject areas

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