基于凸透镜焦距测定的设计研究  

On the Design of Focal Distance of Convex Lens

作　　者：张彦忠[1] 彭桦[1] 

机构地区：[1]云南师范大学物理与信息学院,云南昆明650092

出　　处：《文山师范高等专科学校学报》2009年第2期86-89,共4页Journal of Wenshan Teachers College

摘　　要：文章为薄透镜焦距测量的改进实验,并以测量薄凸透镜的焦距为例进行实验设计和讨论.设计基于高斯成像公式,采用模拟法,利用线桥上均匀电阻丝的长度和电阻之间成正比的关系,将长度的测量转化为电阻量的测量,间接准确地测量物距和像距,运用数字电压表读数直接得到待测凸透镜的焦距,测量方法简单、新颖,使用方便.This paper centers on the improving experimental design of focal distance of thin lens. One experiment aimed to measure the focal distance of the thin lens. Its design was based on the Gaussian image formation formula, and used the analogue method. The research employed the proportional relationship between resistance wire＇s length and the resistance, transformed the length survey to the resistance quantity survey, and then measured the object distance and the image distance exactly and indirectly. Digital voltage was applied to obtain the focal distance of thin lens.

关 键 词：凸透镜 焦距测定 实验设计 模拟法 误差来源分析 

分 类 号：O43-33[机械工程—光学工程]