What is it about?
We show how to measure thin film thickness on curved objects (such as soap bubble) with only one color using a geometrical trick based on the object roundness. This inexpensive and easy method is showcased on soap bubble, anti-bubble and catenoid films.
Featured Image
Photo by Erik Škof on Unsplash
Why is it important?
Thickness is the key parameter in dynamic soap film as it controls its life time and properties. Thanks to this new method, thickness can now be easily measured even on curved objects which are present in a wide variety of applications : encapsulation, double emulsion, drop or bubble coalescence...
Perspectives
The method is based on the bending of the light rays by the curved objects. A similar technique can be developed by using a pair of lens to bends the light opening a new avenue to easily and cheaply measure flat thin film such as in coating application.
Adrien Bussonnière
Centre National de la Recherche Scientifique
Read the Original
This page is a summary of: Absolute thickness field measurement on curved axisymmetric thin free films with monochromatic light, Review of Scientific Instruments, July 2024, American Institute of Physics,
DOI: 10.1063/5.0207511.
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