G - Physics – 01 – B
Patent
G - Physics
01
B
73/115, 33/139
G01B 13/00 (2006.01) A61F 9/00 (2006.01) G01F 17/00 (2006.01)
Patent
CA 1170080
ABSTRACT OF THE DISCLOSURE: A method for measurement of cavity volume of soft contact lenses which consists in free resting of the contact lens immersed in liquid on a planar or convex (preferably spherical) surface, suction off the liquid enclosed between the inner surface of lens and the planar or convex surface, and measuring the volume of sucked-off liquid. This volume is indicated in a measuring capillary tube by the shift of mercury droplet separating the immersion liquid on both sides. And an apparatus for measurement by the invented method, which consists of a vessel with immersion liquid, having a plane or convex surface of its bottom provided with a hole, which is connected with a measuring capillary tube through a broadened inlet chamber containing a mercury drop. The measuring capillary tube is furnished with a scale corres- ponding to its volume and is connected, at the outlet, with a drain or pressure reservoir through a broadened outlet chamber and a unit for pressure variation.
400193
Ceskoslovenska Akademie Ved
Robic Robic & Associes/associates
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