杨氏模量测量实验中光路的调节是关键一步.为实现杨氏模量实验中快速调节望远镜观测清晰的标尺像,文章在光杠杆测定仪进行粗调的关键步骤给出图示指引,形象直观便于实验者理解和操作.对初学者在望远镜调节中常遇到的两个难题:望远镜的手轮该如何调节去寻找标尺的像和标尺像不在望远镜的视场内该如何调整.文章从系统成像的光路对这两种情况进行分析,并给出望远镜的调节方法,避免盲目操作,初学者能够自主快速完成望远镜的调节.%The adj ustment of optical path in the experiment of Youngis Modulus is a key step. To aim at a clear imagination of the ruler on the adj ustment of the telescope in the experiment of Young's Modulus,this paper present a graphic guidance to the key step of the rough adj ust-ment of the optical lever,which can assist manipulators in understanding and manipulation. This measure can help manipulator deal with two problems as follow.One is how to exactly adj ust the wheel of the telescope at sake of seeking the imagination of the ruler.Another is what to do when the imagination of the ruler is not visible in the viewing field of the telescope. This article brings analysis of these two cases from the optical path of imaging system,and of-fers the adj ustment method of the telescope to avoid the blind manipulation,which help the beginners to complete the adj ustment of the telescope independently and quickly.
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