TERMIUM Plus®

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

OUVERTURE UTILE [4 records]

Record 1 1980-07-15

English

Subject field(s)
  • Photography
OBS

In an optical system, an opening through which light can pass.

French

Domaine(s)
  • Photographie
OBS

Diamètre d'un faisceau de rayons parallèles à l'axe optique de l'objectif traversant ce dernier en occupant la totalité du diaphragme considéré. Ce diamètre est à peu près égal au diamètre du diaphragme grand ouvert.

Spanish

Save record 1

Record 2 1976-06-19

English

Subject field(s)
  • Doors, Windows and Openings (Building Elements)

French

Domaine(s)
  • Ouvertures (Éléments du bâtiment)

Spanish

Save record 2

Record 3 1975-03-11

English

Subject field(s)
  • Photography
  • Optics
DEF

This is the diameter of the light beam reaching the lens from a distant object point along its axis, which passes through the edge of the limiting aperture.

French

Domaine(s)
  • Photographie
  • Optique
CONT

L'ouverture relative de l'objectif est le rapport géométrique existant entre la distance focale et le diamètre du faisceau lumineux parallèle à l'axe optique qui passe par le diaphragme (ou diamètre utile du diaphragme).

Spanish

Save record 3

Record 4 1975-03-11

English

Subject field(s)
  • Photography
OBS

--largest aperture at which a lens will give a satisfactory negative, as opposed to the largest aperture to which the diaphragm can be opened.

French

Domaine(s)
  • Photographie
OBS

si, face à une source lumineuse, on applique à l'arrière de l'objectif un verre dépoli, il se forme sur ce dernier un cercle lumineux dont le diamètre est l'-- (...) dite aussi ouverture mécanique.

Spanish

Save record 4

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