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全息照相和全息干涉法研究需要对实验仪器进行精准的控制和调整,同时实验现象的观察与测量依赖于干板的成像效果。而虚拟仿真实验能够弥补实验现象的观察与测量而出现的问题,同时也能够准确体验操作过程,获得更为理想的实验效果。我们基于Unity3D搭建虚拟仿真实验平台,由单色光干涉理论计算得到干板透射率分布,通过再进行实时渲染出实验效果以便学生研究全息照相与全息干涉法实验。借助虚拟仿真平台,可以使实验教学更加轻松,让学生更加直观地理解实验,同时得到更高的实验成功率与更好的实验效果。 相似文献
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全息是一项充满应用前景的3D成像及测量技术,为了更好的辅助全息技术的实验教学,设计了一套教学型数字全息综合实验系统.该系统由计算模拟、光学拍摄、以及数字重构与测量三部分构成.本系统采用优化的全息光路,并配套界面友好的算法程序,降低了数字全息实验的门槛,使得该实验也适合非相关专业的学生. 相似文献
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Measurement of Specimen Thickness by Using Electron Holography and Electron Dynamic Calculation with a Transmission Electron Microscope
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A method of transmission-electron microscopy for accurate measurement of specimen thickness has been proposed based on off-axis electron holography along with the dynamic electron diffraction simulation.The phase shift of the exit object wave with respect to the reference wave in vacuum,resulting from the scattering within the specimen,has been simulated versus the specimen thickness by the dynamic electron diffraction formula.Offaxis electron holography in a field emission gun transmission-electron microscope has been used to determine the phase shift of the exit wave.The specimen thickness can be obtained by match of the experimental and simulated phase shift.Based on the measured phase shift of the [110] oriented copper foil,the thickness can be determined at a good level of accuracy with an error less than-10%. 相似文献
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2005年12月23日,Emmett Leith教授,这位伟大的科学巨匠,全息照相术的先驱因中风不幸在美国Michigan州的Ann Arbor去世,终年78岁. 相似文献
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