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Optical Engineering

Instantaneous three-dimensional flow visualization by rapid acquisition of multiple planar flow images
Author(s): Bryan J. Patrie; Jerry M. Seitzman; Ronald K. Hanson
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Paper Abstract

A flow visualization system is described that provides 3-D snapshots of instantaneous flow structures by rapidly acquiring successive image planes from within the flow. For each 3-D snapshot, up to 20 planar images are collected at the rate of 10,000,000 images/s. Flow visualization at successive planes is by planar particulate scattering or planar laser-induced fluorescence using a laser sheet rapidly swept once across the flow by a 30,000-rpm polygon scanner. Variations in the laser sheet intensity are monitored by placing an on-edge image of the sheet on the periphery of every planar flow image. The camera is a high-speed image converter coupled by fiber optics to a slow-scan CCD camera. The fiber optics provide 2.5 times better light gathering efficiency than lens coupling without reducing the available spatial resolution. The overall measurement technique shows excellent potential as demonstrated with a selection of 3-D measurements.

Paper Details

Date Published: 1 March 1994
PDF: 6 pages
Opt. Eng. 33(3) doi: 10.1117/12.160888
Published in: Optical Engineering Volume 33, Issue 3
Show Author Affiliations
Bryan J. Patrie, Stanford Univ. (United States)
Jerry M. Seitzman, Stanford Univ. (United States)
Ronald K. Hanson, Stanford Univ. (United States)

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