A Compact And Simple all Optical Evaluation Method for PIV Recordings View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1996

AUTHORS

Andreas Vogt , Frank Reichel , Jürgen Kompenhans

ABSTRACT

The Particle Image Velocimetry (PIV) is a technique which is utilized for measuring complete velocity vector fields in a few microseconds time. However, a lot of time is required during the evaluation of the PIV recordings. If the auto-correlation technique is used it is necessary to calculate a few thousand auto-correlation functions (ACFs) for each PIV recording. In this paper an evaluation system for photographical PIV recordings will be described, which allows a completely analog-optical determination of the ACFs of small sub areas of the recording. An optically addressable liquid crystal spatial light modulator was utilized to store the Young’s fringes pattern appearing in the frequency plane at the output of a first optical Fourier processor and to provide them as the input of a second optical Fourier processor. Our analog optical autocorrelator offers a high processing speed and simultaneously a high resolution in the autocorrelation plane. The realized set up is compact and very easy to handle. More... »

PAGES

423-437

References to SciGraph publications

Book

TITLE

Developments in Laser Techniques and Applications to Fluid Mechanics

ISBN

978-3-642-79967-9
978-3-642-79965-5

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-642-79965-5_28

DOI

http://dx.doi.org/10.1007/978-3-642-79965-5_28

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1038384519


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