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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 15 — May. 20, 2008
  • pp: 2874–2881

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

Wen Chen, Chenggen Quan, and Cho Jui Tay  »View Author Affiliations


Applied Optics, Vol. 47, Issue 15, pp. 2874-2881 (2008)
http://dx.doi.org/10.1364/AO.47.002874


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Abstract

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.

© 2008 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(100.5070) Image processing : Phase retrieval
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: February 28, 2008
Revised Manuscript: April 23, 2008
Manuscript Accepted: April 25, 2008
Published: May 15, 2008

Citation
Wen Chen, Chenggen Quan, and Cho Jui Tay, "Measurement of curvature and twist of a deformed object using digital holography," Appl. Opt. 47, 2874-2881 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-15-2874


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