| 摘要 |
PROBLEM TO BE SOLVED: To provide a wettability measuring instrument for precisely measuring the wetness spreading speed of minute liquid droplets with high time resolution. SOLUTION: A liquid droplet pattern is formed on the surface of a substrate 30 by a liquid droplet pattern forming means 20 comprising an ink jet head. The wet area of liquid droplets is measured as a change in the intensity of the reflected light of total reflection light by utilizing that the total reflection condition to incident light is different by the presence of the wetness of the liquid droplets. Since a change only in the contact interface of the substrate and a liquid can be grasped, the wet area of liquid droplets can be measured accurately. COPYRIGHT: (C)2005,JPO&NCIPI |
