出典:Wiktionary
出典:『Wiktionary』 (2025/07/08 04:03 UTC 版)
illuminance (countable and uncountable, plural illuminances)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/07 19:56 UTC 版)
In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.
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