CD光盘光栅衍射中的三类彩色线现象分析  

ANALYSIS OF THREE KINDS OF COLOR LINE IN GRATING DIFFRACTION OF CD DISCS

作　　者：於高冲 陈永翔 鲍成章 徐刚 YU Gaochong;CHEN Yongxiang;BAO Chengzhang;XU Gang(Zhejiang Xiaoshan High School,Hangzhou,Zhejiang 311200)

机构地区：[1]浙江省萧山中学,浙江杭州311200

出　　处：《物理与工程》2024年第3期123-130,共8页Physics and Engineering

摘　　要：本文从干涉、干涉与衍射共同作用、反射角度分析光盘在白炽灯光掠入射情况下所产生的三类彩色线现象。以绿线的产生为例,本研究基于光盘构造从不同入射方式出发,讨论不同入射方式对CD光盘上的彩色线位置产生的影响,解释三类彩色线产生原因,分析其产生条件和影响因素。通过实验本研究对理论模型进行了验证,研究发现:第一、二类彩色线产生在本质上受光阑限制影响,并对光强分布式的形式产生影响,其中从基板上方入射光线会形成第一类彩色线,主要受干涉因子影响;而从基板侧方入射光线会形成第二类彩色线,同时受干涉与衍射因子影响;第三类彩色线的由于中央金属环的反射作用,产生在视线方位。Three types of color line phenomena generated by optical discs under grazing incidence of incandescent light are analyzed from the perspectives of interference,the combined effect of interference and diffraction,and reflection.This paper takes the generation of green lines as an example,based on the construction of optical discs and starting from different incident modes,discusses the impact of different incident modes on the position of color lines on CD discs,explains the reasons for the generation of three types of color lines,and analyzes the conditions for their generation and the factors that affect them.The theoretical model was validated through experiments.It is found that the generation of the first and second types of color lines is essentially influenced by aperture limitations and affects the form of light intensity distribution.The incident light from above the substrate forms the first type of color lines,which are mainly affected by interference factors.While,the incident light from the side of the substrate forms the second type of color line,which is also affected by interference and diffraction factors.The third type of color line is generated in the line of sight direction due to the reflection effect of the central metal ring.

关 键 词：彩色线 CD光盘 干涉 衍射 

分 类 号：O436.1[机械工程—光学工程]