Rainbow surface tension analysis

In this paper we outline a new all-optical non-contact technique for measurement of the surface tension of a Newtonian fluid. It is based on the accurate measurement of the spacing of the supernumerary fringes produced by the diffraction pattern of a laser beam transmitted through or reflected by a...

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Bibliographic Details
Published in:Optics express 2008-03, Vol.16 (7), p.5118-5129
Main Authors: Adler, Charles L, Smith, Valen A, Haddad, Natalie M
Format: Article
Language:English
Subjects:
Algorithms
Lasers
Materials Testing - methods
Microfluidics - methods
Refractometry - methods
Surface Tension
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Summary:In this paper we outline a new all-optical non-contact technique for measurement of the surface tension of a Newtonian fluid. It is based on the accurate measurement of the spacing of the supernumerary fringes produced by the diffraction pattern of a laser beam transmitted through or reflected by a thin vertically-draining film of the liquid. We discuss the basic theory and application of this technique, and several issues which must be addressed before it can be used commercially.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.16.005118