对于金属丝在准直激光照射下形成环形光的研究

Study on Formation of Annular Light under Collimating Laser Radiation on Adiaphanous Cylinder

准直激光照射下的金属丝,会在垂直于金属丝方向的光屏上出现环形光。本文采用在金属丝表面包裹碳颗粒的方法,分离反射光和衍射光,研究光路的组成。接着探究金属丝的半径和粗糙程度对环形光的影响。并在此基础上,测量环形光光强分布规律,结合几何光学和夫琅禾费衍射进行解释。光源也是潜在的影响因素,本文探究了不同波长激光对环形光的影响。

Under irradiation of collimated laser, optical screen that is perpendicular to the direction of metal wire appears ring-shaped light.It adopts the method of wrapping carbon particles on the surface of metal wire to separate reflected light and diffracted light ,and to study the composition of optical path.Then this paper probes into the influence of the radius and roughness of metal wire on the ring-shaped light. On this basis, we measured distribution of light intensity of annular light, and explained it with the geometrical optics and fraunhofer dif- fraction.Light source is also a potential factor.This paper investigates the impact of different wavelengths of laser light on the ring-shaped light.