Document Detail

A simple optical device for measuring free surface deformations of nontransparent liquids.
MedLine Citation:
PMID:  15927619     Owner:  NLM     Status:  PubMed-not-MEDLINE    
In this paper, a novel optical device for measuring the deformation of liquid free surfaces is presented. The device employs a laser beam, which can be focused on any chosen location on the free surface. The key measurement is of the intensity of the beam reflected from a location on the free surface where the deformation exhibits a local extremum. The optics of the device is so designed as to measure a maximum intensity when the distance between the focusing lens and the selected point on the free surface is equal to the focal length, thus enabling a height measurement. The device is tested in ferrofluid pools where the height of the spikes of the normal field instability is measured. The simplicity of the suggested technique enables the fabrication of a quite cheap device for measuring surface deformation of nontransparent liquids, which provides good accuracy and reproducibility.
E G Megalios; N Kapsalis; J Paschalidis; A G Papathanasiou; A G Boudouvis
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of colloid and interface science     Volume:  288     ISSN:  0021-9797     ISO Abbreviation:  J Colloid Interface Sci     Publication Date:  2005 Aug 
Date Detail:
Created Date:  2005-06-01     Completed Date:  2006-11-06     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0043125     Medline TA:  J Colloid Interface Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  508-12     Citation Subset:  -    
School of Chemical Engineering, National Technical University of Athens, Athens 15780, Greece.
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