Abstract

The importance of the wake–free-surface interaction in the detection, classification, and tracking of submerged objects has led to the development of a simple but effective free-surface visualization technique for use in controlled water-tunnel experiments. An experiment was performed to verify the effectiveness and the applicability of this method. Digital images of a spatially varying sinusoidal grid were acquired as seen through the disturbance pattern on the water surface. Image-processing techniques were used to perform phase demodulation of the distorted image. The resulting image details the outline, location, and extent of the surface deformation in a gray-scale format. Optimal digital filter specifications and spatial grid frequencies were determined experimentally for various surface-flow conditions.

© 1995 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Shock-related effects on aero-optical environment for hemisphere-on-cylinder turrets at transonic speeds

Jacob Morrida, Stanislav Gordeyev, Nicholas De Lucca, and Eric J. Jumper
Appl. Opt. 56(16) 4814-4824 (2017)

Optical coherence tomography-based micro-particle image velocimetry

Mircea Mujat, R. Daniel Ferguson, Nicusor Iftimia, Daniel X. Hammer, Ivaylo Nedyalkov, Martin Wosnik, and Hartmut Legner
Opt. Lett. 38(22) 4558-4561 (2013)

Phase retrieval in moiré volume computed tomography based on spatial phase shifting by triple-crossed gratings

Zhenyan Guo, Qun Yuan, Jia Wang, Chao Zuo, and Lei Chen
Appl. Opt. 56(33) 9341-9350 (2017)

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 (7)

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

Tables (1)

You do not have subscription access to this journal. Article tables 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 (9)

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