查看“︁艾里斑”︁的源代码

[[File:Airy pattern dependence on diameter of aperture.gif|thumb|300px|艾里斑随圆孔直径的变化3D图]]
[[File:Diffraction of round aperture.gif|thumb|300px|艾里斑随圆孔直径的变化2D图]]

'''艾里斑'''是点光源通过理想透镜成像时，由于[[繞射]]而在焦点处形成的光斑。中央是明亮的圆斑，周围有一组较弱的明暗相间的同心环状条纹，把其中以第一暗环为界限的中央亮斑称作艾里斑。这个光斑的大小可以用下面的公式来估计：
:<math> \sin \theta \approx 1.22 \frac{\lambda}{d}</math>

艾里斑是以英国皇家天文学家[[乔治·比德尔·艾里]]的名字命名的。因为他在1835年的论文中第一次给出了这个现象的理论解释。

==外部链接==
{{refbegin|2}}
* [http://www.microscopyu.com/articles/formulas/formulasresolution.html "Concepts and Formulas in Microscopy: Resolution"] {{Wayback|url=http://www.microscopyu.com/articles/formulas/formulasresolution.html |date=20130116135129 }} by Michael W. Davidson, ''Nikon MicroscopyU'' (website).
* [http://micro.magnet.fsu.edu/primer/java/imageformation/airyna/index.html "Image Formation: Numerical Aperture and Image Resolution"] {{Wayback|url=http://micro.magnet.fsu.edu/primer/java/imageformation/airyna/index.html |date=20210427074517 }} (Interactive Java Tutorial) by Kenneth R. Spring, Brian O. Flynn, and Michael W. Davidson, ''Molecular Expressions'' (website), June 15, 2006.
* [http://micro.magnet.fsu.edu/primer/java/imageformation/airydiskformation/index.html "Image Formation: Airy Pattern Formation"] {{Wayback|url=http://micro.magnet.fsu.edu/primer/java/imageformation/airydiskformation/index.html |date=20210427071926 }} (Interactive Java Tutorial) by Kenneth R. Spring, Brian O. Flynn, and Michael W. Davidson, ''Molecular Expressions'' (website), June 15, 2006.
* [http://cnx.org/content/m13097/latest/ "Diffraction from a Circular Aperture"] {{Wayback|url=http://cnx.org/content/m13097/latest/ |date=20131030194134 }} by Paul Padley, ''Connexions'' (website), November 8, 2005. – Mathematical details to derive the above formula.
* [https://web.archive.org/web/20120911020523/http://www.oldham-optical.co.uk/Airy%20Disk.htm "The Airy Disk: An Explanation Of What It Is, And Why You Can’t Avoid It"], ''Oldham Optical UK''.
{{refend}}

{{光學小作品}}

[[Category:光学现象]]
[[Category:繞射]]