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辐射功率

輻射度量學中,辐射通量辐射功率是对单位时间内通过某一面积的所有电磁辐射(包括红外、紫外和可见光)总功率的度量,既可以指一辐射源发出辐射的功率,也可以指到达某一特定表面的辐射能量的功率。

单位

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辐射通量的单位是瓦特(W),量纲为功/时间,SI单位表达为焦耳/秒。

參閱

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物理量 符号 国际单位制 單位符號 注释
輻射出射度(Radiant exitance) Me 瓦特每平方米 W·m−2 表面出射的辐射通量
辐射度(Radiosity) Je or J 瓦特每平方米 W⋅m−2 表面出射及反射的辐射通量总和
輻射率(Radiance) Le 瓦特球面度每平方米 W·sr−1·m−2 每單位立體角每單位投射表面的辐射通量
辐射能(Radiant energy) Qe 焦耳 J 能量
辐射能量密度英语Radiant energy density(Radiant energy density) ωe 焦耳每立方米 J⋅m−3
辐射强度(Radiant intensity) Ie 瓦特球面度 W·sr−1 每單位立體角的辐射通量。
辐射曝光量(Radiant exposure) He 焦耳每平方米 J⋅m−2
辐射通量(Radiant flux) Φe 瓦特 W 每單位時間的辐射能量,亦作「辐射功率」。
輻照度(Irradiance) Ee 瓦特每平方米 W·m−2 入射表面的辐射通量。
光譜辐射出射度(Spectral radiant emittance) M

M
瓦特每立方米

瓦特每平方米每赫兹

W⋅m−3
or
W⋅m−2⋅Hz−1
表面出射的辐射通量的波长或频率的分布
光譜輻射率(Spectral radiance) L

L

瓦特球面度每立方米

瓦特球面度每平方米每赫兹

W⋅sr−1m−3

W⋅sr−1⋅m−2Hz−1
常用W⋅sr−1⋅m−2⋅nm−1
光譜輻照度(Spectral irradiance) Eλ

Eν
瓦特每立方米
瓦特每平方米每赫茲
W·m−3

W·m−2·Hz−1
通常測量單位為 W·m−2·nm−1
光譜功率(Spectral power) Φ 瓦特每米 W⋅m−1 辐射通量的波长分布
光谱强度英语Radiant intensity(Spectral intensity) I 瓦特球面度每米 W⋅sr−1⋅m−1 辐射强度的波长分布
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辐射功率
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