TERMIUM Plus®

From: Translation Bureau

On social media

Consult the Government of Canada’s terminology data bank.

REFLECTANCE RATIO [5 records]

Record 1 2002-11-05

English

Subject field(s)
  • Scientific Instruments
  • Optics
CONT

The reflectance was determined using a Perkin-Elmer Lambda 9 double beam ratio recording spectrophotometer equipped with a Labsphere RSA-PE-90 Integrating Sphere accessory.

French

Domaine(s)
  • Instruments scientifiques
  • Optique

Spanish

Save record 1

Record 2 2002-04-03

English

Subject field(s)
  • Remote Sensing
DEF

The quotient of reflectance presented by the same target in two different spectral bands.

OBS

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

French

Domaine(s)
  • Télédétection
DEF

Quotient de la réflectance présentée par une même cible dans deux bandes spectrales différentes.

OBS

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

Spanish

Save record 2

Record 3 2002-03-01

English

Subject field(s)
  • Remote Sensing
CONT

Vegetation monitoring has been one of the main focal points of remote sensing study since remote sensing research began. Many vegetation indices, using red and infrared reflectance, have been devised. The Perpendicular Vegetation Index(PVI), Ratio Index and Normalized Vegetation Index are among the well known indices of this type. The Perpendicular Vegetation Index, proposed by Richardson and Wiegand(1977), was defined as the distance from the soil line on a scatter plot of near infrared(NIR) versus red reflectance. The pixel vectors of bare land in such plots vary with soil moisture content. The PVI was developed as a vegetation index to effectively monitor the vegetation biomass without being affected by differences in soil background.

OBS

perpendicular vegetation index; PVI: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

Indice de végétation utilisé pour la surveillance de la biomasse sans que n'entrent en compte les différences de l'arrière-plan sol.

OBS

indice de végétation perpendiculaire; PVI : terme et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 3

Record 4 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 4

Record 5 1991-05-23

English

Subject field(s)
  • Scientific Instruments
  • Optics
CONT

Comparative color analysis of shoe cream was done on a reflectance colorimeter showing that the total color strength in each product is equivalent.

OBS

"reflectance", [synonym :"reflexion factor"] : The ratio of energy returning from the surface of a sample to that returning from a reference surface, as measured by a specific apparatus. [Source: STROP 1974 p. 163, on a Termium record.

French

Domaine(s)
  • Instruments scientifiques
  • Optique
OBS

Spectrophotométrie. (...) pour la couleur de surface d'un objet, il est nécessaire de préciser la source étalon utilisée pour l'éclairer, et on donnera aussi la réflectance Y, la valeur 100 (ou 99) caractérisant le diffuseur blanc parfait.

OBS

Couleur d'une surface. (...) Y représente directement, en %, la réflectance visuelle (ou encore facteur de réflexion visuel) de l'échantillon considéré.

OBS

Selon Jacques Demers, traducteur physicien du Bureau de la traduction à Montréal, les expressions abstraites se forment à l'aide de la préposition "par", tandis que les appareils sont désignés par des expressions formées à l'aide de la préposition "à". P. EX. : "spectrophotométrie par réflectance".

Spanish

Save record 5

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

GCtranslate (available on the Government of Canada network only)

Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: