“透镜焦距测量”实验中物屏的改进  

The Improvement of Screen Object in the Experiment of Measuring Thin Convex Lens Focal Length

作　　者：葛国芳[1] 丁斌刚[1] 

机构地区：[1]湖州师范学院,浙江湖州313000

出　　处：《大学物理实验》2011年第4期29-30,共2页Physical Experiment of College

摘　　要：针对透镜焦距测量实验中由焦深引起的测量误差,改进了透镜焦距测量实验中的物屏。用此屏测量薄凸透镜的焦距可改善成像焦深现象,同时减小实验所得焦距的离散性。For the measurement error caused by the depth of focus in the Lens focal length measurement experiment,the screen object in the experiment has been improved by taking a 1mm thick blank screen objects,drilling a hole with diameter 1cm at the center of the screen,inserting two pins through the center of the hole horizontally,leaving their heads toward each other with a 0.5mm gap.Using this screen to measure a thin lens focal length can reduce the error caused by the depth of focus.

关 键 词：薄凸透镜 物屏 焦深 

分 类 号：O435.2[机械工程—光学工程]