阿贝常数

定义:

(也称V数或v数)描述一个光学介质的折射率和色散能力的比值的常数。高V数表示对所有波长的折射近似相等(棱镜的色散较小)。

\(\)

这里, \(\) 表示在 \(\) = 588 nm时的V数, \(\) 表示在 \(\) = 486 nm时的f光折射率,\(\)表示在 \(\) = 656 nm时的c光折射率,\(\) 表示在 \(\) = 588 nm时的d光折射率。色散平方的倒数。

English Expression:

Abbe condenser

Definition:

(also V-value or v-value). The constant of an optical medium that describes the ratio of its refractivity to its dispersion. A high V-value indicates more nearly equal refraction at all wavelengths (less rainbow from a prism).

\(\)

where \(\) = V-value at \(\) = 588 nm, \(\) = index of refraction at \(\) = 486 nm, \(\) = index of refraction at \(\) = 656 nm, and \(\) = index of refraction at \(\) = 588 nm. The reciprocal of dispersive power.

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