激光在弯曲液面的反射效应及应用

Laser reflection from the curved liquid surface and its applications

基于激光在润湿效应形成的凹形弯曲液面上边界反射,研究了凹形弯曲液面的特性.结果表明,当平行激光束入射到由圆柱形玻璃管壁润湿效应形成的凹形弯曲液面上时,边界反射可产生特殊的反射图样,且图样半径随入射光束半径的增大迅速变大.通过测量反射图样的半径和入射光束的半径,可实时描绘弯曲液面的性质.利用弯曲液面的边界反射可测得弯曲液面的斜率曲线、弯曲液面上升的最大高度和接触角.

The characterization of the curved liquid surface is described by the boundary light reflected from the sunk curved liquid surface. When a collimated laser beam illumines the sunk curved liquid surface of the wetting columned glass tube, the special reflective patterns can be produced. The radius of the pattern increases with that of the incident beam. The characterization of curved liquid surface is investigated by measuring the radius of the pattern and the incident beam. As a result, the analytic expression of the profile of the curved liquid surface is given, the contact angle and the maximal height of the liquid surface in the experiment are measured by the boundary light reflected from the curved liquid surface.