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单词 Airy Disc
释义

Airy Disc

中文百科

艾里斑 Airy disk

(重定向自Airy Disc)
艾里斑随圆孔直径的变化3D图
艾里斑随圆孔直径的变化2D图
Disco de Airy. La escala de grises se ha adaptado para mostrar mejor el patrón de difracción de los anillos concéntricos.
Corte de la iluminación en función de la posición en un disco de Airy.

艾里斑是点光源通过理想透镜成像时,由于衍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:

 \sin \theta \approx 1.22 \frac{\lambda}{d}

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。

英语百科

Airy disk 艾里斑

(重定向自Airy Disc)
Computer-generated image of an Airy disk. The gray scale intensities have been adjusted to enhance the brightness of the outer rings of the Airy pattern.
Surface plot of intensity in an Airy disk.
Real Airy disk created by passing a laser beam through a pinhole aperture
Log-log plot of aperture diameter vs angular resolution at the diffraction limit for various light wavelengths compared with various astronomical instruments. For example, the blue star shows that the Hubble Space Telescope is almost diffraction-limited in the visible spectrum at 0.1 arcsecs, whereas the red circle shows that the human eye should have a resolving power of 20 arcsecs in theory, though normally only 60 arcsecs.

In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light. The Airy disk is of importance in physics, optics, and astronomy.

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更新时间:2025/6/20 3:58:20