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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 1 — Jan. 1, 2013
  • pp: A397–A409

Digital microscopic holography for micrometer particles in air

Juliana K. Abrantes, Michel Stanislas, Sébastien Coudert, and Luis Fernando A. Azevedo  »View Author Affiliations


Applied Optics, Vol. 52, Issue 1, pp. A397-A409 (2013)
http://dx.doi.org/10.1364/AO.52.00A397


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Abstract

The development of a specific holographic setup designed for providing three-dimensional imaging of micrometer particles in a very small volume inside a large air-flow facility is described. Study of a 1.5mm3 volume is made possible with the use of a microscope objective for magnification of the object field. Particles that are too small to be detected with a standard in-line hologram (about 1 μm in diameter or less) are illuminated laterally, and the 90° scattered field is magnified and recombined with a reference wave for in-line recording. A calibration procedure relates reconstruction space coordinates to measurement volume coordinates. Analysis of the results shows that particle images reconstruct with very good axial accuracy. Preliminary tests show that this approach should allow measurements of fluid velocity very close to the wall in a wind-tunnel flow.

© 2012 Optical Society of America

OCIS Codes
(030.7060) Coherence and statistical optics : Turbulence
(090.0090) Holography : Holography
(090.1995) Holography : Digital holography

History
Original Manuscript: August 16, 2012
Revised Manuscript: November 15, 2012
Manuscript Accepted: November 16, 2012
Published: December 13, 2012

Citation
Juliana K. Abrantes, Michel Stanislas, Sébastien Coudert, and Luis Fernando A. Azevedo, "Digital microscopic holography for micrometer particles in air," Appl. Opt. 52, A397-A409 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-1-A397

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