Method and device for contact angle determination from...

Details Method and device for contact angle determination from... Method and device for contact angle determination from...

2011-05-31

2011-05-31

Lauchman, L. G (Department: 2877)

Optics: measuring and testing

Angle measuring or angular axial alignment

C073S064480, C073S064520

Reexamination Certificate

active

07952698

ABSTRACT:
A drop on a sample surface in a gaseous environment has a curved surface with a symmetry axis and a defined volume. To determine the contact angle, an object is imaged based on the reflection property of the surface of the drop, the position of the object with respect to the optical axis of an optical measuring system and the position of the object with respect to the sample surface, with the symmetry axis of the drop being arranged in or in the vicinity of the optical axis. The distance between the image and the optical axis of the drop is measured. The radius of curvature of the drop is determined based on the measured distance, and the contact angle is determined from the radius of curvature.

REFERENCES:
patent: 5137352 (1992-08-01), Blitshteyn et al.
patent: 6867854 (2005-03-01), Wapner et al.
patent: 7155962 (2007-01-01), Knebel et al.
patent: WO 03/073045 (2003-09-01), None

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