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Proceedings Paper

Influence of the light source on the liquid optical element planarity measurement
Author(s): Jan Hošek; Václav Vinš; Jiří Hykl
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Paper Abstract

The liquid variable focus lenses and mirrors are extensively studied for its variety of applications nowadays because it presents one of the simplest ways for applications as varying optical elements. Instead of other principles the liquid lenses and mirrors can be easily operated by changing the pressure pushing the liquid in and out of the base to change its surface curvature. In case of small diameter optical elements the surface curvature is given by its aperture diameter, applied pressure, and surface tension of the liquid. This feature enables to use such a variable optical element for fine surface tension measurement of small volume of the liquid sample, when the optical element, diameter, and pressure are measured. We are focused on surface tension measurement of small sample of liquid water under supercooled conditions by use of pressure measurement and optical identification of free liquid meniscus planarity. We developed a measurement stand with planar meniscus shape determination by its confocal visualization. We tried different light sources for 0.3 mm diameter meniscus illumination. We discuss an influence of the light source on the liquid meniscus optical element planarity measurement.

Paper Details

Date Published: 7 January 2015
PDF: 8 pages
Proc. SPIE 9442, Optics and Measurement Conference 2014, 94420E (7 January 2015); doi: 10.1117/12.2086494
Show Author Affiliations
Jan Hošek, Czech Technical Univ. in Prague (Czech Republic)
Institute of Thermomechanics of the ASCR, v.v.i. (Czech Republic)
Václav Vinš, Institute of Thermomechanics of the AS CR, v.v.i. (Czech Republic)
Jiří Hykl, Institute of Thermomechanics of the AS CR, v.v.i. (Czech Republic)

Published in SPIE Proceedings Vol. 9442:
Optics and Measurement Conference 2014
Jana Kovačičinová; Tomáš Vít, Editor(s)

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