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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 31 — Nov. 1, 2007
  • pp: 7652–7661

Digital holographic particle validation via complex wave

Jeremy de Jong and Hui Meng  »View Author Affiliations


Applied Optics, Vol. 46, Issue 31, pp. 7652-7661 (2007)
http://dx.doi.org/10.1364/AO.46.007652


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Abstract

The inability to distinguish between particle images and noise in holographic reconstruction of dense particle fields hampers the advancement of holographic particle diagnostic techniques including holographic particle image velocimetry. We developed a method to separate particles from the noise by unlocking a unique particle signature in the complex reconstructed field. This complex-wave signature is present in digital particle holograms recorded at any scattering angle. Simulations of single and multiple particle holograms, as well as preliminary laboratory particle-field experiments, not only demonstrated the existence of the particle signature but also evaluated its ability to remove noise. Regardless of particle seeding density, scattering angle of hologram recording and particle size range, the particle identification∕validation routine consistently provides > 50 % removal of “bad” particles and < 8 % of good particles.

© 2007 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.6890) Image processing : Three-dimensional image processing
(290.4020) Scattering : Mie theory
(290.5850) Scattering : Scattering, particles
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: July 12, 2007
Revised Manuscript: August 23, 2007
Manuscript Accepted: August 23, 2007
Published: October 23, 2007

Citation
Jeremy de Jong and Hui Meng, "Digital holographic particle validation via complex wave," Appl. Opt. 46, 7652-7661 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-31-7652

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