如何判断透镜的光学性质  

How to Ascertain the Optical Property of Lens

作　　者：刘平昌[1] 

机构地区：[1]吕梁高等专科学校物理系,山西离石033000

出　　处：《吕梁高等专科学校学报》2009年第1期32-33,40,共3页Journal of Luliang Higher College

摘　　要：在物理教学中,不少学生对透镜的光学作用存在着疑问.作者从理论上给出一个清晰的判断方法:若光线自左向右传播且在统一的符号原则下,从像方焦距的正负来进行判断透镜的性质.即:若f′>0则为会聚透镜,若f′<0则为发散透镜.In physics teaching,most students can t understand the optical property clearly.In the essay,a distinct way to judge the optical property of lens is made from the perspective of theory.If the light propagates from left to right in the principle of united symbols,the optical property of lens can be judged through the plus or the minus of the image space.If f >0,the lens is a convergent lens;if f <0,it is a a divergent lens.

关 键 词：凸透镜 凹透镜 会聚光作用 发散光作用 

分 类 号：O435[机械工程—光学工程]