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🔭 角分辨率（瑞利判据）Angular Resolution Calculator
θ = 1.22 λ / D（弧度），λ 为波长、D 为口径；换算成角秒，并给出 Dawes 极限 116/D(mm) 角秒作为参考。本地处理。θ = 1.22 λ / D (radians) for wavelength λ and aperture D, in arcseconds too, with the Dawes limit 116 / D(mm) arcsec for reference. Processed locally.
使用说明与常见问题How-to & FAQ
「角分辨率（瑞利判据）」是什么？What is the Angular Resolution Calculator tool?
θ = 1.22 λ / D（弧度），λ 为波长、D 为口径；换算成角秒，并给出 Dawes 极限 116/D(mm) 角秒作为参考。本地处理。θ = 1.22 λ / D (radians) for wavelength λ and aperture D, in arcseconds too, with the Dawes limit 116 / D(mm) arcsec for reference. Processed locally.
如何使用「角分辨率（瑞利判据）」？How do I use the Angular Resolution Calculator tool?
在「角分辨率（瑞利判据）」中，填写「波长 nm」、「口径 mm」等参数，结果会随输入实时计算并显示在下方。In the Angular Resolution Calculator: Fill in "Wavelength nm", "Aperture mm"; results are recalculated instantly as you type.
实际观测能达到这个分辨率吗？Can I reach this resolution in real observing?
通常达不到。地面观测受大气视宁度限制，一般在 1–3 角秒，而口径 100 mm 的望远镜理论极限约 1.4 角秒，所以小型望远镜往往受大气而不是口径限制。Usually not. From the ground, atmospheric seeing is typically 1–3 arcseconds, while a 100 mm telescope's theoretical limit is about 1.4 arcseconds, so small telescopes are usually limited by the air rather than the aperture.
能举个计算实例吗？Can you show a worked example?
例如在「角分辨率（瑞利判据）」中填 波长 nm = 550，口径 mm = 100，结果区显示：角分辨率：0.00000671 rad；角秒：1.384″；Dawes 极限：1.16″For example, entering Wavelength nm = 550, Aperture mm = 100 in the Angular Resolution Calculator gives: Angular resolution: 0.00000671 rad; Arcseconds: 1.384″; Dawes limit: 1.16″
哪些输入会被检查？Which inputs are validated?
「角分辨率（瑞利判据）」会检查这些输入——「波长 nm」、「口径 mm」：必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Angular Resolution Calculator checks its inputs — "Wavelength nm", "Aperture mm": required, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「角分辨率（瑞利判据）」的设置：「波长 nm」默认 550；「口径 mm」默认 100。每次生成结果都按当前设置处理。Settings in the Angular Resolution Calculator — "Wavelength nm" default 550; "Aperture mm" default 100. The result always uses the current settings.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「角分辨率（瑞利判据）」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Angular Resolution Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「角分辨率（瑞利判据）」免费吗？需要注册吗？Is the Angular Resolution Calculator free? Do I need an account?
「角分辨率（瑞利判据）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Angular Resolution Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.