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luminous transmittance [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-08-05

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Electromagnetic Radiation
  • Optical Glass
Universal entry(ies)
tauv
symbol, see observation
DEF

The ratio of the luminous flux transmitted by an ocular or filter to the incident luminous flux for a specified illuminant and photopic vision.

OBS

This is usually expressed as a percentage ...

OBS

tauv: In the symbol, "tau" must be replaced by the corresponding small, italicized Greek letter, and "v," which is defined as "the photometric quantity indicating that the radiant energy equivalent has been adjusted to take into account the human eye’s spectral sensitivity to visible radiation," must be written in subscript (tauv).

OBS

luminous transmittance; tauv: term, symbol and definition standardized by the International Organization for Standardization (ISO).

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Rayonnements électromagnétiques
  • Verres d'optique
Entrée(s) universelle(s)
tauv
symbol, see observation
DEF

Rapport flux lumineux transmis par un oculaire ou un filtre à la lumière incidente pour un illuminant spécifié et une vision photopique.

OBS

Il est habituellement exprimé en pourcentage [...]

OBS

tauv : Dans le symbole, «tau» doit être remplacé par la lettre minuscule grecque correspondante écrite en italique, et «v», qui signifie «la grandeur photométrique indiquant que l'énergie rayonnante équivalente a été réglée pour tenir compte de la sensibilité spectrale de l'œil au rayonnement visible», s'écrit en indice (tauv).

OBS

facteur de transmission dans le visible; tauv : terme, symbole et définition normalisés par l'Organisation internationale de normalisation (ISO).

Spanish

Campo(s) temático(s)
  • Medición y análisis (Ciencias)
  • Radiación electromagnética
  • Vidrios ópticos
Entrada(s) universal(es)
tauv
symbol, see observation
DEF

Relación entre el flujo luminoso transmitido por el filtro y el flujo luminoso incidente.

OBS

Para el cálculo debe ser introducida la eficiencia luminosa.

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