| 利用Lau效应测量透镜焦距 |
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| 引用本文： | 陈远绳,曹向群,蔡伟建,游龙翔. 利用Lau效应测量透镜焦距[J]. 光学仪器, 1988, 0(1) |
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| 作者姓名： | 陈远绳 曹向群 蔡伟建 游龙翔 |
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| 作者单位： | 浙江大学，浙江大学，浙江大学，浙江大学 |
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| 摘 要： | 本文介绍了利用Lau效应测量透镜焦距的方法,给出了实验原理图、计算公式以及实验数据,并提出了提高测量精度的途径。文中对Lau效应中的公式Z_0=α/β·Ρ~2/λ的系数α/β进行了探讨。认为α/β既可为其它作者所推荐的正的既约有理数,(在某些情况下)也可为任意小数,并且在该条件下尚可得到较好的满足测量要求对比的条纹。
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Measure ment on the Foeal lengthes of lenses by Means of lau EFFect |
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| Abstract: | In this paper we describe a method using Lau Effect to measure the focal lengthes of lenses. The experimental system we have set up and the exxeriments which have been done are descrbed, and formulae are used to calculate the focal lengthes of the lens being measured. A clue to improve the measurement accuray is given. The coefficient (α/β) in the formula of Lau Effect Z_0=(α/β) p~2/λ is discussed. It has been concluded that in some cases the confficient(α/β) can not only be a positive numeric rational number, but also be a arbitrary partition, and under this condition the coutrast of Lau fringes are still good enough for measurement. |
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