变化入射角的激光在毛细波上的衍射

为了研究毛细波激光衍射图样的强度和位置随激光入射角的变化规律,采用激光衍射法实现了变化入射角的激光在毛细波上的衍射。结果表明,随着激光入射角的变化,衍射图样的强度和位置随入射角的变化而变化,并且有缺级现象出现,入射角越大,衍射图样的位置不对称性越明显。建立了毛细波的激光衍射理论,给出了衍射图样的强度和位置与激光入射角的关系,实验结果和理论分析吻合得较好。这一结果对完善毛细波激光衍射理论是有帮助的。

Laser diffraction from capillary waves at the different incident angles

The dependence of intensity and position of laser diffraction from capillary waves on incident angles was studied by means of diffraction.When the laser beam obliquely impinges on capillary waves at the different incident angles,the diffraction intensity and position change with the incident angles,and there is a phenomenon of missing orders in the diffraction patterns.Asymmetry of diffraction positions increases with the increase of the incident angle.The theory of laser diffraction from capillary waves at the different incident angles was found,and the analytic expression of the diffraction intensity and position at the different incident angles was obtained.The theoretical and experimental results are in good agreement.The conclusion is valuable for the theory and the application of laser diffraction from capillary waves.