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| Our research group routinely uses both 2D and 3D imaging
to study laboratory models of fluid flows in geophysical
and astrophysical turbulence. We are also investigating scientific
image generation and display. Some of the issues are: How can we present
high-quality 3D images of science and nature to large audiences of
"walking by" students, as part of the effort to get people
interested in environmental science? What is the best way to show in-class students
the anatomy of storms and current weather systems using 3D? How can
we present research results in stereo (e.g. computer simulations,
or measurements of fluid flow at several image planes) to interested
individuals or small groups at scientific meetings? How can we image
wavy fluid surfaces in 3D in order to extract surface shapes and other features?
Results of this work are contained in the 3D
Guide and TechNotes
sections of this site.
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| Infinite Depth of Field Photography and 3D Microscopy: | |||
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| In our fluid dynamics research we are interested in how fluid interfaces behave at small scale. If a fluid is contained in a box 1 millimeter on a side, capillary forces act more strongly than gravity in determining the fluid interface shape. Such situations occur readily on the space station where gravity is absent. We would like to image such fluid interfaces in 3D, or by some other means, to extract the interface shape when the box is placed under a low power reflecting light microscope. The techniques developed to do this may be used in more general 3D optical microscopy. Experiments with sequential image slice generation and recombination suggest a viable method of surface shape extraction. Because the microscope's depth of field is so small, the in-focus part of the fluid interface essentially gives a contour of its height, which is precisely what is desired to diagnose thermocapillary dynamics, and the like. Sample imagery and more details of this work will be reported on our science site in due course. | |||
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© 2003, John Hart. All rights reserved. Full copyright policy.