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词汇 Fraunhofer diffraction pattern
分类 英语词汇 英语翻译词典
释义

Fraunhofer diffraction pattern

中文百科

夫琅禾费衍射 Fraunhofer diffraction

（重定向自Fraunhofer diffraction pattern）
Plane wave focused by a lens.
Graph and image of single-slit diffraction
Geometry of single slit diffraction

在光学上，夫琅禾费衍射（以约瑟夫·冯·夫琅和费命名），又称远场衍射，是波动衍射的一种，在场波通过圆孔或狭缝时发生，导致观测到的成像大小有所改变，成因是观测点的远场位置，及通过圆孔向外的衍射波有渐趋平面波的性质。

夫琅禾费衍射可在菲涅耳衍射的近场距离外观测到，而菲涅耳衍射会同时影响到成像的大小及形状，而且只会在菲涅耳数 F \ll 1时才会发生，这时候可以使用平行光束近似。

英语百科

Fraunhofer diffraction 夫琅禾费衍射

（重定向自Fraunhofer diffraction pattern）
Plane wave focused by a lens.
Graph and image of single-slit diffraction
Geometry of single slit diffraction
Computer simulation of Fraunhofer diffraction by a rectangular aperture

In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance from the diffracting object, and also when it is viewed at the focal plane of an imaging lens. In contrast, the diffraction pattern created near the object, in the near field region, is given by the Fresnel diffraction equation.
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