光杠杆实验中尺读望远镜视场部分不清晰的成因和改善  

The reason and improvement of the obscure in the filed of vision through rule-read telescope in light lever experiment

作　　者：李兰秀[1] 张仲秋[1] 朱琴 

机构地区：[1]北京师范大学物理系,北京100875 [2]北京市昌平第二中学,北京102208

出　　处：《大学物理》2011年第10期34-35,51,共3页College Physics

摘　　要：对光杠杆实验中经常见到的尺读望远镜视场部分不清晰的成因作了深入的分析和实验验证,证明是因为背景光进入尺读望远镜,降低了直尺在尺读望远镜中的像的对比度所致,提出慢慢将物镜向像不清晰那个方向调整就能改善.The cause of the partially un-sharp field of view for rule-read telescope,which often occurs in light lever experiment,is analyzed and verified experimentally.It is proved that the reason is bias light enters rule-read telescope and reduces the contrast of the ruler＇s image.It is suggested that slowly adjust objective lens to fit the un-sharp area should be improved.

关 键 词：光杠杆 成像 

分 类 号：O435.1[机械工程—光学工程]