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流明

流明(lumen,符號:lm)係國際單位制光通量單位[1],用嚟表示人眼從一個光源所接收嘅發光量,可以視為可見光嘅發光量。光通量唔同輻射通量,輻射通量係發光總能量,而光通量按人眼對唔同波長嘅光敏感程度做咗相對調整。

1 流明等於 1 坎德拉嘅光源向 1 球面度嘅範圍所發光嘅光通量。

1 lm = 1 cd·sr = 1 cd·m2·m–2

cd係發光強度單位坎德拉,sr係立體角單位球面度,m係長度單位

參考

[編輯]
  1. "SI brochure, Table 3 (Section 2.2.2)". 原著喺2007年6月18號歸檔. 喺2013年7月11號搵到.
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流明
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