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Experiments in Fluids

, Volume 12, Issue 6, pp 353–358 | Cite as

Three-dimensional particle imaging with a single camera

  • C. E. Willert
  • M. Gharib
Originals

Abstract

A new approach to the instantaneous three-dimensional mapping of flow fields is introduced. A single camera system uses defocusing in conjunction with a mask (three pin holes) embedded in the camera lens to decode three-dimensional point sources of light (i.e., illuminated particles) on a single image. The sizes and locations of the particle image patterns on the image plane relate directly to the three-dimensional positions of the individual particles. Using sequential images, particles may be tracked in space and time, yielding whole-field velocity information. Calibration of the system is straightforward, whereas the self-similarity of the particle image patterns can be used in automating the data-extraction process. The described technique was used to obtain particle trajectories in the flow field of a vortex ring impinging on a wall.

Keywords

Vortex Flow Field Point Source Image Plane Sequential Image 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • C. E. Willert
    • 1
  • M. Gharib
    • 1
  1. 1.Dept. of Applied Mechanics and Engineering Sciences 0411University of CaliforniaSan Diego, La JollaUSA

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