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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 34 — Dec. 1, 2011
  • pp: H22–H29

Coal powder measurement by digital holography with expanded measurement area

Yingchun Wu, Xuecheng Wu, Zhihua Wang, Linghong Chen, and Kefa Cen  »View Author Affiliations

Applied Optics, Vol. 50, Issue 34, pp. H22-H29 (2011)

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The field of view of digital in-line holography for flow field diagnostics is restricted to a small volume due to the finite size and the low spatial resolution of the available CCD. Expansion of the measurement cross section of digital holographic particle image velocimetry was investigated with a lens-based holography configuration. By sampling the chirp signal in the center lobe completely and undersampling the chirp signal in the second- and higher-order lobes by a magnified virtual recording plane produced by an imag ing camera lens, the field of view is expanded. Simulation results show that the three-dimensional (3D) location and size of the relatively large particle can be reconstructed with good accuracy. A digital holographic particle image velocimetry system was established for coal particle flow field diagnostics. Compared with the lensless configuration, the field of view of the digital holography system was enlarged 1.9 times, up to 2.78 cm × 2.78 cm × 3 cm . The 3D location, size distribution, and the 3D vector field of coal powder were obtained. The results show that the application of digital in-line holography to measure large particle flow field is feasible.

© 2011 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(090.1995) Holography : Digital holography

ToC Category:

Original Manuscript: June 17, 2011
Revised Manuscript: August 22, 2011
Manuscript Accepted: August 22, 2011
Published: October 7, 2011

Virtual Issues
Digital Holography and 3D Imaging 2011 (2011) Applied Optics

Yingchun Wu, Xuecheng Wu, Zhihua Wang, Linghong Chen, and Kefa Cen, "Coal powder measurement by digital holography with expanded measurement area," Appl. Opt. 50, H22-H29 (2011)

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