TERMIUM Plus®

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

DIOPTRE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-05-16

English

Subject field(s)
  • Metrology and Units of Measure
  • Optics
  • Optical Glass
Universal entry(ies)
D
correct, symbol, see observation
DEF

A unit of focusing power of an ocular, lens or surface, or of the vergence (refractive index divided by the radius) of a wavefront.

OBS

[This] unit of optical measure [is] the reciprocal of the focal length of a lens in meters.

OBS

The dioptre is expressed in reciprocal metres (m-1).

OBS

Commonly used symbol and abbreviation for the dioptre are D and dpt.

OBS

dioptre; D: term, symbol and definition standardized by the International Organization for Standardization (ISO).

Key term(s)
  • dioptry

French

Domaine(s)
  • Unités de mesure et métrologie
  • Optique
  • Verres d'optique
Entrée(s) universelle(s)
D
correct, symbol, see observation
DEF

Unité de mesure de puissance focale d'un oculaire, d'un verre ou d'une surface, ou unité de mesure de la vergence (indice de réfraction divisé par le rayon) d'une surface d'onde

OBS

[Cette] unité de puissance de réfraction d'une lentille [est] l'inverse de la distance focale mesurée en mètres.

OBS

La dioptrie, D, est exprimée en mètres à la puissance moins 1 (m-1).

OBS

Les symbole et abréviation communément utilisés pour la dioptrie sont D et pdt.

OBS

dioptrie; D : terme, symbole et définition normalisés par l'Organisation internationale de normalisation (ISO).

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
  • Óptica
  • Vidrios ópticos
Entrada(s) universal(es)
D
correct, symbol, see observation
DEF

Unidad que expresa con valores positivos o negativos el poder de refracción de una lente o potencia de la lente y equivale al valor recíproco o inverso de su longitud focal (distancia focal) expresada en metros.

OBS

El signo "+" (positivo) corresponde a los lentes convergentes, y el "-" (negativo) a los divergentes. Así, una lente cuya longitud focal sea de +1 metro, tendrá una potencia de 1 dioptría y una lente de +2 dioptrías es una lente convergente de longitud focal de 0,5 metros.

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Record 2 2002-11-27

English

Subject field(s)
  • Photography
  • Optics
OBS

When the power of a lens is stated in diopter (equals d), its focal length is given by 100/d in centimetres, e.g., a lens with a power of 17 diopters has a focal length of 100/17 equals 5.88 c.m.

French

Domaine(s)
  • Photographie
  • Optique
DEF

Surface optique séparant deux milieux de réfringence inégale.

OBS

Convergence d'un système optique dont la distance focale est de 1 mètre dans un milieu dont l'indice de réfraction est 1.

Spanish

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