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ILUMINANCIA [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2007-02-05

English

Subject field(s)
  • Space Physics
  • Optics
  • Atmospheric Physics
DEF

Quotient of the luminous flux incident on an infinitesimal element of a surface containing the point under consideration, by the area of that element.

CONT

Illuminance (usually 'E' in formulas) is the total amount of visible light illuminating (incident upon) a point on a surface from all directions above the surface. This "surface" can be a physical surface or an imaginary plane. Therefore illuminance is equivalent to irradiance weighted with the response curve of the human eye.

OBS

Standard unit for illuminance is Lux (lx) which is lumens per square meter (lm/m²). There are several older units of illuminance: footcandle: 1 fc = 10.764 lx; phot: 1 ph = 10 000 lx. Typical illuminance values are: 1 lx = full moon; 10 lx = street lighting; 100-1 000 lx = workspace lighting; 10 000 lx = surgery lighting; 100 000 lx = plain sunshine.

OBS

"Illumination" is a deprecated term for "illuminance".

OBS

illuminance: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Physique spatiale
  • Optique
  • Physique de l'atmosphère
DEF

Quotient du flux lumineux reçu par un élément infinitésimal d'une surface entourant le point considéré, par l'aire de cet élément.

OBS

Le symbole de l'éclairement est Er.

OBS

Les unités du Système international (SI) : [...] l'éclairement lumineux E, dont l'unité est le lux (lm/m²) [...]

OBS

éclairement lumineux : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Física espacial
  • Óptica
  • Física de la atmósfera
DEF

Cociente entre el flujo luminoso incidente sobre un elemento infinitesimal de superficie que contiene el punto considerado por el área de dicho elemento.

Save record 1

Record 2 2003-07-16

English

Subject field(s)
  • Meteorology
  • Optics
DEF

Illuminance without any contribution from the direct solar radiation.

OBS

Illumination is a deprecated term for Illuminance.

French

Domaine(s)
  • Météorologie
  • Optique
DEF

Éclairement lumineux sans contribution du rayonnement solaire direct.

Spanish

Campo(s) temático(s)
  • Meteorología
  • Óptica
DEF

Iluminancia a la cual no contribuye la radiación solar directa.

Save record 2

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