| 单词 | airy disk |
| 释义 | Airy disk Airy disk(air -ee) The bright disklike image of a point source of light, such as a star, as seen in an optical system with a circular aperture. The disk is formed by diffraction effects in the instrument and is surrounded by faint diffraction rings that are only seen under perfect conditions (see illustration). The disk diameter, first calculated by George Airy in 1834, is the factor limiting the angular resolution of the telescope.
Airy disk[¦er·ē ¦disk]Airy diskAiry diskThe best focused spot of light that can be created by a perfect lens system, assuming a circular aperture and limited by light diffraction. The disk is surrounded by concentric rings known as an Airy pattern. Since the disk is the smallest unit that makes up the image of a luminous or absorbing object—formed by a corrected microscope lens in focus—the radius of the disk determines the limit of resolution of the lens system or microscope. |
| 随便看 |
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。