| 激光衍射测微小位移及表面缺陷 |
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| 引用本文： | 孙玉玲. 激光衍射测微小位移及表面缺陷[J]. 武汉大学学报(工学版), 1994, 0(4) |
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| 作者姓名： | 孙玉玲 |
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| 作者单位： | 武汉水利电力大学基础科学系 |
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| 摘 要： | 现代光学认为理想的夫郎和弗衍射是一种付里叶频谱分析器．本文利用上述理论推导夫郎和弗单缝衍射公式，并精确地测出钢的线胀系数．它与理论值十分吻合．并利用付里叶变换４Ｆ系统检测出物体表面微小缺陷和污点．以上研究在计量技术上有广泛的应用价值．
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| 关 键 词： | 激光应用；衍射；位移 |
Measuring Miero-displacement and Surface Defects with Laser Diffraction |
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| Sun Yuling. Measuring Miero-displacement and Surface Defects with Laser Diffraction[J]. Engineering Journal of Wuhan University, 1994, 0(4) |
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| Authors: | Sun Yuling |
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| Affiliation: | Department of Basie Science |
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| Abstract: | Fraunhofcr's diffraction is a Fouricr spectrum analyser in modcrn optics. Based on thistheory, Fraunhofoer' s diffraction formula is derived in this paper.Linear dilatation coefficient ofcopper is accurately obtained from experimental measurement and its result is basically consistcnt withthe theorical calculation one.The surface defect of body is determined by the 4F-system. This methodcan be widly used in metrical techniques. |
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| Keywords: | laser application diffraction displacement |
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