Measurement of curvature and twist of a deformed object using digital holography

Journal Article · Tue May 20 00:00:00 EDT 2008 · Applied Optics

DOI:https://doi.org/10.1364/AO.47.002874· OSTI ID:21120794

Wen, Chen; Chenggen, Quan; Tay, Cho Jui

Measurement of curvature and twist is an important aspect in the study of object deformation. In recent years, several methods have been proposed to determine curvature and twist of a deformed object using digital shearography. Here we propose a novel method to determine the curvature and twist of a deformed object using digital holography and a complex phasor. A sine/cosine transformation method and two-dimensional short time Fourier transform are proposed subsequently to process the wrapped phase maps. It is shown that high-quality phase maps corresponding to curvature and twist can be obtained. An experiment is conducted to demonstrate the validity of the proposed method.

• OSTI ID: 21120794
• Journal Information: Applied Optics, Vol. 47, Issue 15; Other Information: DOI: 10.1364/AO.47.002874; (c) 2008 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DEFORMATION
DIGITAL SYSTEMS
FOURIER TRANSFORMATION
HOLOGRAPHY
IMAGE PROCESSING
INTERFEROMETRY
MAPS
MORPHOLOGY
PHASE SHIFT
SIGNALS
TWO-DIMENSIONAL CALCULATIONS