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Double pattern improves the Schlieren methods for measuring liquid–air interface topography.
- Source :
- Experiments in Fluids; Aug2022, Vol. 63 Issue 8, p1-11, 11p
- Publication Year :
- 2022
-
Abstract
- The Schlieren method intends to reveal the elevation of a refractive fluid–fluid interface. The method is based on a comparison of images of a single pattern placed at the bottom of the container. Accurate measurements can be obtained with a simple and low-cost optical setup. However, it is restricted to weak interface deformations, weak slopes and weak paraxial angles. To overcome these limitations, we propose an enhanced optical setup that uses a bitelecentric objective and a double pattern. Thanks to this new setup, we avoid geometrical approximations and we extend the method to moderate/large deformations. Moreover, the proposed method does not depend on the liquid depth and could be used in various applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- LIQUID-liquid interfaces
TOPOGRAPHY
Subjects
Details
- Language :
- English
- ISSN :
- 07234864
- Volume :
- 63
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Experiments in Fluids
- Publication Type :
- Academic Journal
- Accession number :
- 159032437
- Full Text :
- https://doi.org/10.1007/s00348-022-03467-w