| 凹透镜焦距测量自准直法的改进 |
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| 引用本文： | 廖立新. 凹透镜焦距测量自准直法的改进[J]. 吉首大学学报(自然科学版), 2015, 36(4): 30-32. DOI: 10.3969/j.cnki.jdxb.2015.04.008 |
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| 作者姓名： | 廖立新 |
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| 作者单位： | (吉首大学物理与机电工程学院，湖南 吉首 416000) |
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| 基金项目： | 湖南省普通高等学校教学改革研究资助项目(湘教通[2013]223号)；吉首大学实验室开放基金资助项目 |
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| 摘 要： | 对传统自准直法的凹透镜焦距测量方法进行了分析,提出改进的自准直测凹透镜焦距方法.将移像屏法改进为移凹透镜法,消除了焦深对实验测量结果的影响.实验结果表明,修正的自准直法测量凹透镜焦距的精确度得到较大提高,平均相对误差减少3.93%,方差减小20.39mm2.
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| 关 键 词： | 自准直法 移像屏法 移凹透镜法 焦深 |
Measurement of the Focal Length of the Concave Lens by Improved Autocollimation Method |
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| LIAO Lixin. Measurement of the Focal Length of the Concave Lens by Improved Autocollimation Method[J]. Journal of Jishou University(Natural Science Edition), 2015, 36(4): 30-32. DOI: 10.3969/j.cnki.jdxb.2015.04.008 |
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| Authors: | LIAO Lixin |
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| Affiliation: | (College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China) |
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| Abstract: | Based on the classical autocollimation method of measuring the focal length of the concave lens,the paper proposes an improved autocollimation method through which concave lens instead of image screen are moved so that the influence of focal depth on the measurement result can be eliminated. The analysis on the experimental results shows that the accuracy of measuring the focal length of the concave lens by the improved autocollimation method greatly increases，with the average decrease of relative error by 3.93% and the decrease of variance by 20.39 mm. |
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| Keywords: | autocollimation method method of moving image screen method of moving concave lens fo-cal depth |
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