折射率对薄透镜成像的影响  

The Effects of the Refractive Index on Thin Lens Imaging

作　　者：蒋遷林 胥靖 秦媛[1] 倪陶[1] 黎昌金[1] 

机构地区：[1]内江师范学院工程技术学院,四川内江641199

出　　处：《内江师范学院学报》2015年第8期11-14,24,共5页Journal of Neijiang Normal University

基　　金：四川省教育厅自然科学基金重点项目(14ZA0246);四川省教育厅大学生创新创业训练计划项目(X201317)

摘　　要：从薄透镜成像公式出发,推导出薄透镜物方和像方焦距公式,以凸透镜和凹透镜为例研究其焦距随介质折射率的变化规律.当介质折射率小于透镜折射率时,凸透镜起会聚作用,凹透镜起发散作用;当介质折射率大于透镜折射率时,凸透镜起发散作用,凹透镜起会聚作用.实验表明,实验结果与理论推导出的结论是一致的.From the thin lens imaging formula,the formulas of the front focal length and the back focal length of the thin lens are deduced,and the changing law is examined of the focal length when the medium refractive index changes by a case study of the positive lens and negative lens.Results show that when the refractive index of the medium is less than that of the lens,concave lens play a convergent role,and the convex lens play a divergent role.But when the refractive index of the medi-um is greater than that of the lens,concave lens play a divergent role,and convex lens have a convergent effect.The experi-mental investigation shows that the experimental result is consistent with the theoretical conclusion.

关 键 词：薄透镜 物像 折射率 

分 类 号：O435.1[机械工程—光学工程]