Methods and devices for detemining the contact angle of a...

Details Methods and devices for detemining the contact angle of a... Methods and devices for detemining the contact angle of a...

G - Physics

01

B

33/53

G01B 11/26 (2006.01) G01N 13/02 (2006.01)

Patent

CA 2013691

- 12 - ABSTRACT OF THE DISCLOSURE The invention relates to improvements to methods and devices for determining the contact angle of a drop of liquid placed on a substrate. The device comprises : a support 12 for a substrate 11 which receives a drop of liquid 9; a light source 1; optical means, formed for example by a plate with parallel faces 21 rotatable about its axis 22 and whose inclination with respect to the axis may be modified, with a reflecting prism 5a, for forming a primary beam 6a, advantageously annular, striking the interface 8 between drop and substrate; a receiving surface 13a, 13b formed by a reflection diffusing surface; a reflecting surface 17; and a camera C.

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