Abstract

Optical processors for generating a two-dimensional squared autocorrelation function have been presented for postprocessing particle image velocimetry photographs of fluid flows. The incoherent-to-coherent conversion can be performed by an optically addressed spatial light modulator. The transfer function of these devices is far from linear and will influence the performance of the optical processor.

Two different transfer functions, characterizing the two main types of commercial optically addressed spatial light modulators as an analog and a binary transfer function, have been simulated digitally.

Results of numerical simulations on the influence of introducing these nonlinear transfer functions to the correlation function for particle image velocimetry analysis are presented.

© 1995 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Particle image velocimetry fringe processing using an optically addressed spatial light modulator

J. P. Sharpe and K. M. Johnson
Appl. Opt. 31(35) 7399-7402 (1992)

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)

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)

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 (5)

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