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LUMINANCE LUMINEUSE [8 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-03-11

English

Subject field(s)
  • Atmospheric Physics
DEF

Luminance determined by the amount of light scattered, reflected and transmitted by the particles which constitute a cloud. This light comes mainly from a luminary or from the sky; an appreciable part may also come from the Earth's surface.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Luminance due à la lumière réfléchie, diffusée et transmise par les particules constitutives de ce nuage. Cette lumière provient, pour la plus grande part, directement de l'astre éclairant ou du ciel; une part appréciable peut provenir également de la surface terrestre.

Spanish

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

Luminancia determinada por la cantidad de luz difundida, reflejada y transmitida por las partículas que forman una nube. Esta luz procede principalmente del Sol, de la Luna o del cielo; una parte apreciable puede proceder también de la superficie de la Tierra.

Save record 1

Record 2 2011-11-17

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Optics
DEF

At a point on the surface of a source, in a given direction, ratio of the luminous intensity, in the given direction, of an element of the surface at this point to the orthogonally projected area of the element on a plane perpendicular to the given direction.

OBS

Luminance [is] a photometric term that quantifies brightness of a light source or of an illuminated surface that reflects light. It is expressed as foot lamberts (English units) or candelas per square meter (Metric units).

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Optique
DEF

En un point de la surface d'une source, dans une direction, quotient de l'intensité lumineuse, dans la direction donnée, d'un élément de surface en ce point, par l'aire de l'élément projeté orthogonalement sur un plan perpendiculaire à la direction donnée.

OBS

Grandeurs photométriques : [...] luminance lumineuse Lv. Unité : cd/m².

OBS

L'unité de mesure est la candela par unité de surface.

OBS

luminance lumineuse : terme recommandé pr l'Office de la langue française.

Spanish

Campo(s) temático(s)
  • Medición y análisis (Ciencias)
  • Óptica
DEF

En un punto de la superficie de una fuente luminosa, en una dirección dada, cociente entre la intensidad luminosa en dicha dirección de un elemento de la superficie que contiene el punto y el área de la proyección ortogonal del elemento sobre un plano perpendicular a tal dirección.

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Record 3 2009-04-30

English

Subject field(s)
  • Optics
CONT

The HMD (helmet mounted display) comprises two CRT (cathode ray tube) image sources, each with an identical, independent, modular optics arrangement for each eye. Each arrangement comprises an aluminum or suitable plastic or composite material housing enclosing relay optics (not visible) common to both day and night luminance conditions.

French

Domaine(s)
  • Optique

Spanish

Campo(s) temático(s)
  • Óptica
Save record 3

Record 4 1998-06-09

English

Subject field(s)
  • Statistical Methods
  • Computer Graphics

French

Domaine(s)
  • Méthodes statistiques
  • Infographie

Spanish

Save record 4

Record 5 1998-03-20

English

Subject field(s)
  • Optics
CONT

If we consider ... all different luminance factor curves leading to point k in combination with illuminant B, we see that the colours produced can only differ in luminance. We can now ask which of all these curves produces the colour showing the greatest luminance. We say that the surface having this property possesses an optimal colour.

Key term(s)
  • optimal color

French

Domaine(s)
  • Optique
OBS

couleur de luminance lumineuse maximale; couleur optimale : termes normalisés par l'AFNOR.

Spanish

Save record 5

Record 6 1985-11-01

English

Subject field(s)
  • Optics
  • Illumination Engineering
DEF

the ratio of the luminance of a surface or medium under specified conditions of incidence, observation, and light source, to the luminance of a perfectly reflecting or transmitting, perfectly diffusing surface or medium under the same conditions.

French

Domaine(s)
  • Optique
  • Éclairagisme
DEF

Rapport de la luminance lumineuse du corps à celle d'un diffuseur parfait par réflexion ou par transmission éclairé dans les mêmes conditions.

Spanish

Save record 6

Record 7 1985-06-17

English

Subject field(s)
  • Range Measurements (Telecommunications)

French

Domaine(s)
  • Mesures à distance (Télécommunications)

Spanish

Save record 7

Record 8 1975-03-11

English

Subject field(s)
  • Reprography
  • Photography

French

Domaine(s)
  • Reprographie
  • Photographie
OBS

-- quotient de l'intensité lumineuse, dans une direction donnée, d'un élément de surface d'une source par l'aire de projection orthogonale de cet élément sur un plan perpendiculaire. [p.10]

Spanish

Save record 8

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