| 单词 | luminance |
| 释义 | luminance /looh"meuh neuhns/, n. 1. the state or quality of being luminous. 2. Also called luminosity. the quality or condition of radiating or reflecting light: the blinding luminance of the sun. 3. Optics. the quantitative measure of brightness of a light source or an illuminated surface, equal to luminous flux per unit solid angle emitted per unit projected area of the source or surface. [1875-80; < L lumin- (s. of lumen) light + -ANCE] |
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