Phase-conjugate holographic system for high-resolution particle-image velocimetry

Journal Article · Thu Oct 20 00:00:00 EDT 1994 · Applied Optics; (United States)

DOI:https://doi.org/10.1364/AO.33.007159· OSTI ID:6815217

Barnhart, D H; Adrian, R J ^[1]; Papen, G C ^[2]

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1. Electro-Optic Systems Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
2. Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

A novel holographic particle-image velocimeter system has been developed for the study of three-dimensional (3-D) fluid velocity fields. The recording system produces 3-D particle images with a resolution, a signal-to-noise ratio, an accuracy, and derived velocity fields that are comparable to high-quality two-dimensional photographic particle-image velocimetry (PIV). The high image resolution is accomplished through the use of low [ital f]-number optics, a fringe-stabilized processing chemistry, and a phase conjugate play-back geometry that compensates for aberrations in the imaging system. In addition, the system employs a reference multiplexed, off-axis geometry for the determination of velocity directions with the cross-correlation technique, and a stereo camera geometry for the determination of the three velocity components. The combination of the imaging and reconstruction subsystems makes the analysis of volumetric PIV domains feasible.

• DOE Contract Number: FG05-89ER75508
• OSTI ID: 6815217
• Journal Information: Applied Optics; (United States), Vol. 33:30; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HOLOGRAPHY
USES
TURBULENT FLOW
VELOCITY
VELOCIMETERS
DESIGN
FLUID FLOW
IMAGE PROCESSING
SPATIAL RESOLUTION
THREE-DIMENSIONAL CALCULATIONS
MEASURING INSTRUMENTS
PROCESSING
RESOLUTION
440600* - Optical Instrumentation- (1990-)
665000 - Physics of Condensed Matter- (1992-)