Abstract

The direction of fluid motion can be determined in particle image velocimetry (and laser speckle velocimetry) if the image field is spatially shifted between the first and second exposures, so that the most negative fluid velocity still produces a positive particle image displacement. Two new techniques are described which accomplish very fast accurate image shifting using electrooptical hardware. These methods involve regulating the polarization of light scattered from the seeding particles by switching the polarization of the illuminating beam, and placing a birefringent unaxial plate in front of the photographing lens to displace the particle image between illuminating pulses.

© 1988 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Contrast-enhancement techniques for particle-image velocimetry

Paul A. Dellenback, Jayakrishnan Macharivilakathu, and Scott R. Pierce
Appl. Opt. 39(32) 5978-5990 (2000)

Laser speckle photography and particle image velocimetry: photographic film noise

C. J. D. Pickering and N. A. Halliwell
Appl. Opt. 23(17) 2961-2969 (1984)

Particle image velocimetry: image labeling by use of adaptive optics to modify the point-spread function

N. J. Lawson, N. A. Halliwell, and J. M. Coupland
Appl. Opt. 33(19) 4241-4247 (1994)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription