激光在测定液体表面张力系数及折射率中的应用

实验发现 :激光束照射在振动的液面上 ,表面波对入射光可产生衍射 ;用扩束后的激光束入射在插入细针的液面区 ,其反射光场中心分布近似为一暗椭圆形。以上两种实验现象机理 ,可用于液体表面张力系数的测定。激光经小孔透射样品池中的液体介质 ,在液体上表面发生遮光效应 ,根据其机理 ,建立了一种测量液体折射率的新方法

Applications of Laser in Measurement of Surface tension and Refractive index

Experiments show that, when the laser light illuminates the vibrancy liquid surface, the surface wave may diffract the incident light. When an expanded laser beam illuminates the area of the liquid surface where a pin is penetrated, the center part of reflective field is dark with a elliptic-like shape. The principles of the above experiments can be applied to measure the coefficient of tension for liquid surface. When laser light transmits through a pinhole in liquid, the light-stopping effect happens at the liquid surface. Based on the principle of this experiment a new method for measurement of liquid refractive index has bean built.