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Optics Letters

Optics Letters


  • Vol. 33, Iss. 9 — May. 1, 2008
  • pp: 905–907

Three-dimensional particle imaging by defocusing method with an annular aperture

Dejiao Lin, Natalia C. Angarita-Jaimes, Siyu Chen, Alan H. Greenaway, Catherine E. Towers, and David P. Towers  »View Author Affiliations

Optics Letters, Vol. 33, Issue 9, pp. 905-907 (2008)

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We propose an annular-aperture-based defocusing technique for three-dimensional (3D) particle metrology from a single camera view. This simple configuration has high optical efficiency and the ability to deal with overlapped defocused images. Initial results show that an uncertainty in depth of 23 μ m can be achieved over a range of 10 mm for macroscopic systems. This method can also be applied in microscopy for the measurement of fluorescently doped microparticles, thus providing a promising solution for 3D flow metrology at both macroscales and microscales.

© 2008 Optical Society of America

OCIS Codes
(110.1220) Imaging systems : Apertures
(110.6880) Imaging systems : Three-dimensional image acquisition
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(180.0180) Microscopy : Microscopy

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: December 17, 2007
Revised Manuscript: March 7, 2008
Manuscript Accepted: March 14, 2008
Published: April 22, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

Dejiao Lin, Natalia C. Angarita-Jaimes, Siyu Chen, Alan H. Greenaway, Catherine E. Towers, and David P. Towers, "Three-dimensional particle imaging by defocusing method with an annular aperture," Opt. Lett. 33, 905-907 (2008)

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