共查询到17条相似文献,搜索用时 62 毫秒
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为精确、快速测量镜组内各透镜间的轴向间隙,提出一种基于五维自动调整的差动共焦间隙测量方法。该方法根据CCD探测器实时获取的光斑信号检测被测镜组光轴的平移偏差与倾斜偏差,依据偏差信息、通过五维自动调整技术实现镜组高精度调整,再利用差动共焦高精度层析定焦和镜组内部光线追迹实现轴向间隙高精度测量。分析和实验表明,本方法可以有效提高姿态调整效率3.4倍,透镜间隙重复测量精度可达到0.53μm。该方法为实现镜组间隙的快速高精度测量提供了有效途径,同时还为透镜的中心厚度、焦距、半径等多种参数快速高精度测量提供了有效方法。 相似文献
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提出了测量共焦球面扫描干涉仪精细常数实验方案.该方案利用示波器测量共焦球面扫描干涉仪扫描两相邻透射峰时间Δt_(2π)及扫描单个透射峰相位半宽度所需时间Δt_φ,共焦球面扫描干涉仪的精细常数为Δt_(2π)与Δt_φ比值.利用该方案,在不同扫描频率及不同电压下,测量了共焦球面扫描干涉仪精细常数.测量结果表明,在不同锯齿波扫描频率及不同驱动电压下,实验所测得精细常数与厂家所提供理论值趋于一致,实验结果证明该测量方案可靠可行.同时本文对测量数据中,Δt_(2π)及Δt_φ与扫描频率及扫描电压成反比这一实验现象进行了理论分析. 相似文献
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本文探讨一种使用单模光纤同时作为点源与点探测器的激光共焦扫描显微系统。该系统具有与传统共焦扫描相同的功能,但更容易操作,结构更简单,系统更稳定,文中给出系统的原理设计方案,并对其光学特性进行分析。 相似文献
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Karel Hamal 《Czechoslovak Journal of Physics》1968,18(3):419-422
A solid state laser has been developed which employs a spherical pumping cavity. The rod of the active medium (ruby, neodymium, etc.) and the flash tube are symmetrically placed with respect to a plane passing through the centre of the sphere. With Nd3+-doped glass an efficiency of 3% is obtained. 相似文献
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Yu. S. Kovalev V. A. Skuratov S. I. Tyutyunnikov G. Buinarovski 《Physics of Particles and Nuclei Letters》2010,7(5):364-369
The applicability of Raman scanning confocal microscopy for investigations in the field of condensed matter physics is demonstrated. 相似文献
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In this paper, we study the complexity factor for a charged anisotropic self-gravitating object. We formulate the Einstein–Maxwell field equations, Tolman–Opphenheimer–Volkoff equation, and the mass function. We form the structure scalars by the orthogonal splitting of the Riemann tensor and then find the complexity factor with the help of these scalars. Finally, we investigate some astrophysical objects for the vanishing of complexity condition. It is found that the presence of the electromagnetic field decreases the complexity of the system. 相似文献
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