大学物理 ›› 2023, Vol. 42 ›› Issue (9): 28-.doi: 10.16854/j.cnki.1000-0712.230070

• 物理实验 • 上一篇    下一篇

自准直法测量薄凸透镜焦距实验中的干扰像分析

于翠玲,姜向前,姚凤凤,骆素华,林珊,乌大琨   

  1. 哈尔滨工业大学物理学院,黑龙江  哈尔滨150001
  • 收稿日期:2023-03-10 修回日期:2023-06-02 出版日期:2023-10-16 发布日期:2023-10-18
  • 作者简介:于翠玲(1979—),女,吉林长春人,哈尔滨工业大学工程师,博士,主要从事大学物理实验教学和光电材料研究工作,E-mail:cuiling.yu@hit.edu.cn
  • 基金资助:
    中央高校基本科研业务费专项基金(HIT.NSRIF.2020100)、黑龙江省教育厅高等教育本科教学改革研究项目(SJGY20220035)资助

Analysis on interferential images in the experiment of measuring the focal length of thin convex lens by auto-collimation method

YU Cui-ling, JIANG Xiang-qian, YAO Feng-feng, LUO Su-hua, LIN Shan,  WU Da-kun   

  1. School of Physics, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
  • Received:2023-03-10 Revised:2023-06-02 Online:2023-10-16 Published:2023-10-18

摘要: 自准直法测薄凸透镜焦距实验中会出现多个干扰像,其中包括凸透镜后表面反射成像. 实验发现,通过调控凸透镜和平面镜的位置,可以得到等大倒立的干扰实像,但其亮度明显弱于自准直法成的像. 本文通过多次成像过程分析,给出了此干扰像的成像原理. 

关键词: 自准直法, 凸透镜, 平面镜, 成像

Abstract: Several interferential images are shown in the experiment of measuring the focal length of thin convex lens by auto-collimation method, including the direct reflection imaging of the rear surface of convex lens. It is found that an isometrical and handstand interferential real image is obtained by adjusting the position of convex lens and plane mirror. However, the brightness of the interferential image is weaker than that of the image achieved by auto-collimation method. In this paper, the imaging principle of the interferential image is explained by analyzing the multiple imaging process.

Key words: auto-collimation method, convex lens, plane mirror, imaging