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焦距法测试自聚焦透镜折射率分布常数 总被引:1,自引:0,他引:1
本文介绍了一种测量自聚焦透镜折射率分布常数的方法─—焦距法,并进行了原理公式推导,和精度分析,其测量不确定度为±1×10 ̄(-3);其次,简要地介绍了实验方法。实验结果证明了焦距法是测量自聚焦透镜折射率分布常数的简单实用的方法,它具有装置简单、数据处理也不复杂的特点,是一种非破坏性的测试方法。 相似文献
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本文从矩阵公式出发,通过对自聚焦透镜镜内虚、实截距的分析,给出一种测量聚焦常数g的方法,并确定出透镜加工过程的尺寸修正量。如采用分子散射法已测得g,则可利用本文导出的公式来做中心折射率测量。 相似文献
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本文讨论了自聚焦透镜列阵重叠度,分析了重叠度对分辨率及照度分布的影响,并对一系列单根自聚焦透镜和两列自聚焦透镜列阵作了测量,得到了制造自聚焦透镜列阵的一个重要依据.实验中总结出照度分布不均匀规律的经验公式. 相似文献
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使用自聚焦透镜测量小位移的新方法 总被引:4,自引:0,他引:4
提出一种使用自聚焦透镜构成的光强度调制的光学位移测量原理,利用发光二极管作光源,光从第一根自聚焦透镜发出,然后受到反射镜的反射而进入第二根自聚焦透镜,当反射镜有小位移时,进入第二根自聚焦透镜的光强度被调制,用光电管检测光强度的变化,可以确定位移的大小。根据该原理,位移分辨率的理论值可达10^-9m,实验测量的位移分辨率为10^-8m,该原理亦可用于测量小振动和压力等量。 相似文献
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根据近轴子午光线方程,研究了自聚焦透镜光纤加速度计的工作原理。据光功率耦合,分析了光纤和自聚焦透镜物理参数之选择。同时,对自聚焦透镜倾斜的影响给出了定量分析。本文从理论上证明了这种结构新颖,体积极小,精度高,成本低之自聚焦透镜光纤加速度计是合理可行的。 相似文献
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本文分析了色差的产生和表示,计算和测量了锂玻璃自聚焦透镜成像系统中的轴向色差与横向色差,讨论了色差对自聚焦透镜列阵成像的影响。 相似文献
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自聚焦透镜的光斑尺寸与像差特性分析 总被引:1,自引:1,他引:1
对自聚焦透镜的光斑尺寸和像差特性进行了理论分析.利用自聚焦透镜光斑测量系统对样品的出射光斑进行了扫描,测得了光斑的大小;用读数显微镜和正方形网格图分别测量了样品的球差和畸变,并对光斑的测量作了误差分析,讨论了球差与畸变、光斑和像差之间的关系.所得结果对光斑质量的改善、像差特性的研究和自聚焦透镜的评估有一定的参考价值. 相似文献
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采用自聚焦透镜光纤加速度计研究 总被引:2,自引:0,他引:2
本文根据近轴子午光线方程,研究了自聚焦透镜光纤加速度计的工作原理;根据光功率耦合,分析了光纤和自聚焦透镜物理参数的选择。同时,对自聚焦透镜倾斜的影响给出了定量分析。本文从理论上证明了这种结构新颖、体积极小、精度高、成本低的自聚焦透镜光纤加速度计是可行的。 相似文献
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求解定态薛定谔方程常常会涉及到常微分方程的本征值问题.目前解常微分方程本征值用的比较多的方法是以龙格-库塔方法为基础的打靶方法.打靶方法常用,但是计算时间长.当边界条件比较复杂或比较敏感的时候,用松弛法会有更好的效果.本文用松弛法解薛定谔方程,并和理论解进行比较.发现松弛法得到的数值解和理论解符合度很高,而且使用松弛法能够很快得到符合要求的解. 相似文献
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I. I. Belotelov A. V. Lanyov G. A. Ososkov 《Physics of Particles and Nuclei Letters》2006,3(4):261-272
In this paper a method of internal alignment of HERA-B OTR PC chambers is discussed. The method is based on a simultaneous
fit of the track and alignment parameters, using Millepede matrix reduction and singular value decomposition. Software implementing
this idea has been developed, and the method has been studied on Monte Carlo models with different levels of simulation. A
generalization of this method for the case of the nonlinear track model has been proposed.
The text was submitted by the authors in English. 相似文献
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E.A.G. Armour 《Molecular physics》2013,111(1):181-203
The ground-state energy of the hydrogen molecule is calculated using both the standard variational method and a new transcorrelated method. The value obtained with the new method compares favourably with that obtained by the standard method. If the method used in this paper can be extended to more complicated systems, it is expected that it will enable more accurate energies to be calculated for these systems than is possible using the standard variational method. 相似文献
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本文提出了一种测量正多面棱体与多齿分度台同轴度误差的非接触直接测量方法。与传统方法相比,该方法测量的结果中包含了多面棱体与其轴座的配合间隙的影响。实验证明这种方法是有效的。 相似文献
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N. I. Zhirnov 《Russian Physics Journal》1966,9(5):25-28
The nature and the conditions of applicability of the generalized WKB method (the Petrashen-Miller-Good method) are investigated. It is shown that the generalized WKB method is a new approximate method for quantum mechanics, differing essentially from the WKB method.In conclusion I wish to express my sincere appreciation to Academicians V. A. Fok and M. I. Petrashen for their interest in this work and their valuable advice in the process of its completion. 相似文献
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In this paper, we propose a palmprint recognition method based on the representation in the feature space. The proposed method seeks to represent the test sample as a linear combination of all the training samples in the feature space and then exploits the obtained linear combination to perform palmprint recognition. We can implement the mapping from the original space to the feature space by using the kernel functions such as radial basis function (RBF). In this method, the selection of the parameter of the kernel function is important. We propose an automatic algorithm for selecting the parameter. The basic idea of the algorithm is to optimize the feature space such that the samples from the same class are well clustered while the samples from different classes are pushed far away. The proposed criterion measures the goodness of a feature space, and the optimal kernel parameter is obtained by minimizing this criterion. Experimental results on multispectral palmprint database show that the proposed method is more effective than 2DPCA, 2DLDA, AANNC, CRC_RLS, nearest neighbor method (NN) and competitive coding method in terms of the correct recognition rate. 相似文献