16 May 2007 Surface tension determination using liquid sample micromirror property
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Abstract
This paper presents an application of adaptive optics principle onto small sample of liquid surface tension measurement. The principle of experimental method devised by Ferguson (1924) is based on measurement of pressure difference across a liquid sample placed into small diameter capillary on condition of one flat meniscus of the liquid sample. Planarity or curvature radius of the capillary tip meniscus has to be measured and controlled, in order to fulfill this condition during measurement. Two different optical set-ups using liquid meniscus micromirror property are presented and its suitability for meniscus profile determination is compared. Meniscus radius optical measurement, data processing and control algorithm of the adaptive micromirror profile set are presented too. The presented adaptive optics system can be used for focal length control of microsystems based on liquid micromirrors or microlenses with long focal distances especially.
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Jan Hošek, "Surface tension determination using liquid sample micromirror property", Proc. SPIE 6584, Adaptive Optics for Laser Systems and Other Applications, 65840A (16 May 2007); doi: 10.1117/12.722704; https://doi.org/10.1117/12.722704
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