TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

DENSITE OPTIQUE [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2014-10-29

English

Subject field(s)
  • Radiological Physics (Theory and Application)
  • Radiography (Medicine)
  • Audio Technology
DEF

In radiation physics, the negative logarithm of the transmittance, defined in this case as the ratio of the radiant energy transmitted by an object (I) to the incident radiant energy (Io).

French

Domaine(s)
  • Physique radiologique et applications
  • Radiographie (Médecine)
  • Électroacoustique
DEF

[...] le logarithme décimal du rapport du flux lumineux incident reçu par le film au flux lumineux transmis par le film.

OBS

Selon l’AFNOR, la densité optique se définit comme le «logarithme décimal de l'inverse du facteur de transmission».

OBS

densité optique : terme normalisé par l'AFNOR.

Spanish

Save record 1

Record 2 2010-10-15

English

Subject field(s)
  • Analytical Chemistry
  • Phraseology
  • Optics
DEF

Logarithm of the ratio of incident to transmitted radiant power through a sample (excluding the effects on cell walls).

OBS

The terms absorbancy, extinction and optical density are not recommended synonyms.

PHR

Absorbance unit.

PHR

Baseline absorbance.

PHR

Linear, low, UV absorbance.

French

Domaine(s)
  • Chimie analytique
  • Phraséologie
  • Optique
PHR

Absorbance à deux longueurs d'onde.

Key term(s)
  • densité optique
  • extinction

Spanish

Campo(s) temático(s)
  • Química analítica
  • Fraseología
  • Óptica
Save record 2

Record 3 2003-11-14

English

Subject field(s)
  • Remote Sensing
DEF

A quantity that characterizes the transparency of an optical element and that is expressed by the common logarithm of opacity.

CONT

Blank filters were also bleached and re-filtered using the same procedure. Care was taken to ensure that both sample and blank filters did not dry out since dry filters adversely affect the optical density of the sample.

French

Domaine(s)
  • Télédétection
DEF

Grandeur qui caractérise la transparence d'un élément optique et s'exprime par le logarithme décimal de l'opacité.

CONT

Bidois a constaté qu'à partir d'une densité optique à 270 nm d'environ 1, il se dégage une relation significative entre les densités optiques à 210 et 270 nm [...] Par ailleurs si elle développe une densité optique à 270 nm supérieure à 1, cela indique qu'elle a séjourné longtemps au contact du sol de la zone humide.

Spanish

Save record 3

Record 4 2003-03-07

English

Subject field(s)
  • Remote Sensing
DEF

A measure of the light absorption of a photographic image. Optical density equals the logarithm to the base 10 of opacity and is usually referred to simply as density.

French

Domaine(s)
  • Télédétection

Spanish

Save record 4

Record 5 2001-12-04

English

Subject field(s)
  • Optics
  • Metrology and Units of Measure
DEF

The degree of opacity of a translucent medium expressed by log Io/I, where Io is the intensity of the incident ray, and I is the intensity of the transmitted ray.

CONT

If one medium has a greater refractive index than another for light of a given wavelength, then it has the greater optical density for that wavelength.

French

Domaine(s)
  • Optique
  • Unités de mesure et métrologie
DEF

Logarithme décimal de l'inverse du facteur de transmission (densité optique par transmission) ou du facteur de réflexion (densité optique par réflexion) d'un milieu.

OBS

La densité n'est pas une grandeur intrinsèque, sa valeur dépend des conditions de mesure.

OBS

densité optique : terme normalisé par l'AFNOR.

Spanish

Campo(s) temático(s)
  • Óptica
  • Metrología y unidades de medida
Save record 5

Record 6 1992-04-27

English

Subject field(s)
  • Optics

French

Domaine(s)
  • Optique

Spanish

Save record 6

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