利用细棒润湿效应弯曲液面边界反射的研究  

Study on boundary light reflection from curved liquid surface by the wetting rod

作　　者：朱峰[1] 苗润才[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院

出　　处：《激光杂志》2007年第5期72-73,共2页Laser Journal

基　　金：教育部教师重点资金(批准号:02068)资助项目;陕西省教育厅基金项目(0204025);陕西省科技厅科技计划项目(2004K05-G47)

摘　　要：发现了细棒润湿效应时弯曲液面上边界反射光场的圆形暗场扩张效应。当平行激光束垂直入射到由细棒润湿效应引起的弯曲液面上时,边界反射产生特殊的反射图样,图样的中心为圆形暗场,周围有清晰的衍射条纹,并且暗场的半径随入射光束半径的缩小而变大。理论上分析了反射图样暗场的半径与边界入射光束半径的解析关系,实验室上计算了弯曲液面的斜率,进而得出弯曲液面上升的最大高度和接触角。建立了一种利用弯曲液面边界反射的暗场扩张效应来实时测量液面特性的新方法。The distensible effect of a circle - shape-dark region light reflection from Curved liquid surface was discovered. When a collimated laser beam illumines the curved hquid surface by the wetting rod, the special reflective patterns, which correspond to the boundary light reflection, can be produced. In fact, there is the pattern with dark central region and the high visibility diffraction fringes around, and the radius of dark region largen with thc reduced radius of the incident beam. The relation of the radius of the dark region and the radius of the incident beam was derived theoretically. Subsequently, calculste the slope, the surface maximal height and the contact angle of liquid surface. It is believed that the distensible effect of a circle - shape dark region is capable of real time characterization of curved liquid surface.

关 键 词：反射光场 润湿效应 弯曲液面 接触角 

分 类 号：O435.1[机械工程—光学工程]