TERMIUM Plus®

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Consult the Government of Canada’s terminology data bank.

REFLECTANCE METER [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-02-20

English

Subject field(s)
  • Optical Instruments
  • Optics
  • Pulp and Paper
OBS

photometer: A device for measuring light intensity.

CONT

The whiteness of pulp is measured by its ability to reflect monochromatic light in comparison to a known standard.... The instrument most commonly used is the Zeiss Elrepho reflectance meter which provides a diffuse light meter.

French

Domaine(s)
  • Instruments d'optique
  • Optique
  • Pâtes et papier
DEF

Appareil à réflectance servant à mesurer des intensités lumineuses.

Spanish

Save record 1

Record 2 2004-03-18

English

Subject field(s)
  • Photography
DEF

A card with an 18 percent gray tint(reflectance) used to determine exposure by taking a meter reading from subject light reflected by the card.

CONT

Neutral test card. A panel, usually with an 18% reflectance gray surface on one side and a 90% reflectance white surface on the other. Such a card is useful as a standard object for light measurement in estimating the required camera settings, and also for checking color balance in color images.

Key term(s)
  • grey card

French

Domaine(s)
  • Photographie
DEF

Carte gris neutre [...] dont la réflexion est de 18 %, ce qui correspond à un sujet moyen.

OBS

On la place devant le sujet et on mesure la lumière qu'elle réfléchit, cette méthode permettant de faire abstraction de la couleur du sujet, de son éventuel aspect composite ou très contrasté ou de l'influence des sources d'éclairage.

Spanish

Save record 2

Record 3 1998-09-15

English

Subject field(s)
  • Optics
  • Properties of Paper
  • Graphic Arts and Printing
DEF

The colour depth(optical density) of a printed image. It may be measured directly by a user-friendly optical density meter. Measured by colourimeter, it is calculated as the logarithm to the base ten of the ratio of the Y value(the luminous reflectance factor of unprinted paper) to the luminous reflectance factor of the printed paper with an opaque pad of the unprinted paper as background.

French

Domaine(s)
  • Optique
  • Propriétés des papiers
  • Imprimerie et arts graphiques
DEF

Densité optique exprimée par le logarithme du rapport de la réflectance du papier vierge à celle du papier imprimé.

Spanish

Save record 3

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