英文版利用牛顿环方法测量激光波长.docVIP

Liaoning Normal University 开放实验室项目研究论文 题 目： 利用牛顿环方法测量激光波长 学 院： 物理与电子技术学院 专 业： 物理学（师范） 班级序号： 2班05号 学 号： 20081125020018 学生姓名： 牛萌 指导教师： 张敏 2011年 月 Measurement of the wavelength of He-Ne Laser by means of Newtons ring Meng Niu, Min Zhang School of Physics and Electronic Technology, Major: Physics, Grade: 08 Abstract: The traditional method of measuring wavelength used some more high accuracy and complex operation of instruments, which caused many inconveniences to the actual application. This paper gives a new method to measure the wavelength of laster by a new means of Newtons ring and the results of the diffraction grating measuring laser wavelength also have a high accuracy. Key words: He-Ne Laser; Laser wavelength; Newtons ring. Introduction Laser as a light source because its monochromatic good, orientation of strong, dispersion characteristics such as less in modern science and technology and engineering practice in a wide range of applications. In the actual measurement generally used to know in advance the wavelength of laser source. Different materials and luminous mechanism of laser source has different wavelength. Therefore, how to determine the wavelength of the laser is has the very vital significance. Newtons ring is a kind of method of amplitude points such as interference phenomenon of thick, the earliest for Newton found. In order to study the color of the film, Newton had been carefully studied convex surface of glass peace experiment device. His most valuable achievements is found by measuring the concentric circles of radius it out of a burning glass and plane between the thickness of the air layer corresponding position; Corresponding to the air layer thickness and bright ring 1, 3, 5... In proportion, corresponding to the air layer thickness and dark rings 0, 2, 4... In proportion. But because he advocated light particles said (light interference is the volatility of the light of a kind of express