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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 10 — May. 15, 2009
  • pp: 1522–1524

Shape and deformation measurements of 3D objects using volume speckle field and phase retrieval

Arun Anand, Vani K Chhaniwal, Percival Almoro, Giancarlo Pedrini, and Wolfgang Osten  »View Author Affiliations


Optics Letters, Vol. 34, Issue 10, pp. 1522-1524 (2009)
http://dx.doi.org/10.1364/OL.34.001522


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Abstract

Shape and deformation measurement of diffusely reflecting 3D objects are very important in many application areas, including quality control, nondestructive testing, and design. When rough objects are exposed to coherent beams, the scattered light produces speckle fields. A method to measure the shape and deformation of 3D objects from the sequential intensity measurements of volume speckle field and phase retrieval based on angular-spectrum propagation technique is described here. The shape of a convex spherical surface was measured directly from the calculated phase map, and micrometer-sized deformation induced on a metal sheet was obtained upon subtraction of the phase, corresponding to unloaded and loaded states. Results from computer simulations confirm the experiments.

© 2009 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(050.1960) Diffraction and gratings : Diffraction theory
(100.5070) Image processing : Phase retrieval
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(290.5880) Scattering : Scattering, rough surfaces

ToC Category:
Image Processing

History
Original Manuscript: March 17, 2009
Revised Manuscript: April 18, 2009
Manuscript Accepted: April 11, 2009
Published: May 8, 2009

Citation
Arun Anand, Vani K Chhaniwal, Percival Almoro, Giancarlo Pedrini, and Wolfgang Osten, "Shape and deformation measurements of 3D objects using volume speckle field and phase retrieval," Opt. Lett. 34, 1522-1524 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-10-1522


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