Abstract

The use of an optically addressed spatial light modulator for processing images from a particle image velocimetry system is demonstrated. The results obtained by using a binary ferroelectric liquid-crystal device are compared with those obtained by conventional means (electronic Fourier transformation of the fringe patterns). It is shown that both methods of processing are capable of determining particle velocities to within 5% error when the autocorrelation peak separations are plotted against known particle separations. However, the optical processor is capable of operation speeds in excess of 3 kHz, whereas electronic-based systems perform the task at 1–10 Hz.

© 1992 Optical Society of America

Fringe visibility improvement using an asynchronous image-subtracting optically addressed spatial light modulator

J. P. Sharpe, P. R. Barbier, G. Moddel, and K. M. Johnson
Appl. Opt. 34(20) 4013-4021 (1995)

Particle image velocimetry analysis using an optically addressed spatial light modulator: effects of nonlinear transfer function

Michael L. Jakobsen, William J. Hossack, and Clive A. Greated
Appl. Opt. 34(11) 1757-1762 (1995)

Particle image velocimetry: high-speed transparency scanning and correlation-peak location in optical processing systems

Z. Q. Mao, N. A. Halliwell, and J. M. Coupland
Appl. Opt. 32(26) 5089-5091 (1993)

Parallel processing system for rapid analysis of speckle-photography and particle-image-velocimetry data

J. M. Huntley, H. T. Goldrein, and L R. Benckert
Appl. Opt. 32(17) 3152-3155 (1993)

Integrating mode for an optically addressed spatial light modulator

A. M. Gabor, B. Landreth, and G. Moddel
Appl. Opt. 32(17) 3064-3067 (1993)