激光反射法测量弯曲液面特性  

Probing the Properties of Curved Liquid Surface by Laser-beam Reflection

作　　者：苗润才[1,2] 朱峰[1,3] 罗道斌[1,4] 

机构地区：[1]陕西师范大学物理学与信息技术学院 [2]榆林学院物理系,陕西榆林719000 [3]西安通信学院基础部,西安710106 [4]陕西科技大学理学院,西安710021

出　　处：《光子学报》2007年第10期1872-1875,共4页Acta Photonica Sinica

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

摘　　要：发现了弯曲液面上边界反射光场的带状暗场扩张效应.当平行激光束垂直入射到由平板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,图样的中间为带状暗场,两侧有清晰的衍射条纹,并且带状暗场宽度随入射光束宽度的缩小而迅速变大.分析了反射图样的带状暗场宽度与入射光束宽度的解析关系,得出了弯曲液面的斜率曲线和高度曲线.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 strip-shape dark region light reflection from curved liquid surface was discovered. When a collimated laser beam illumines the curved liquid surface by the wetting plate, the special reflective patterns, which correspond to the boundary light reflection, can be produced. In fact, there is the pattern with a strip shape dark region in the center and the high visibility diffraction fringes both sides,and the width of dark region largen with the reduced width of the incident beam. The relation of the width of the dark region and the width of the incident beam was derived theoretically and got the slope,the contact angle and the surface height of liquid surface. It is believed that the distensible effect of a stripshape dark region is capable of real time characterization of curved liquid surface.

关 键 词：边界反射 润湿效应 弯曲液面 接触角 

分 类 号：O435.1[机械工程—光学工程]