TERMIUM Plus®

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

DIAPHRAGME AUTOMATIQUE [4 records]

Record 1 2003-10-20

English

Subject field(s)
  • Audiovisual Techniques and Equipment
  • Video Technology
DEF

A circuit fitted to the lens iris which allows the aperture of the lens to automatically adjust to varying light levels, providing a constant picture.

French

Domaine(s)
  • Audiovisuel (techniques et équipement)
  • Vidéotechnique
DEF

Contrôle automatique qui asservit l'ouverture du diaphragme de la caméra à l'amplitude du signal vidéo analysé.

Spanish

Save record 1

Record 2 1994-07-15

English

Subject field(s)
  • Artificial Intelligence
DEF

Device for automatic exposure control in which a motor-driven iris diaphragm adjusts the aperture in response to a signal from a photocell detecting ambient light.

French

Domaine(s)
  • Intelligence artificielle
OBS

Projet de norme ISO sur la visionique.

Spanish

Save record 2

Record 3 1991-08-29

English

Subject field(s)
  • Optical Instruments
  • Photography
DEF

A lens in which the Iris is motor driven. The lens opening is dictated by the camera which tries to maintain an optimum picture by telling the lens to open more in the dark and close down in higher light levels. If the light level is constant then a fixed Iris lens is recommended (much cheaper).

OBS

A required element in a CCD camera (based on source a)

French

Domaine(s)
  • Instruments d'optique
  • Photographie
DEF

Objectif dont le diaphragme est actionné par un moteur. L'ouverture du diaphragme est réglée par la caméra de façon à maintenir la meilleure image possible. La caméra commande une ouverture plus ou moins grande, en rapport inverse avec l'intensité de la lumière. Si l'intensité de la lumière est constante, nous recommandons un objectif à diaphragme fixe (beaucoup moins cher).

OBS

Auto iris/diaphragme automatique.

Spanish

Save record 3

Record 4 1981-03-31

English

Subject field(s)
  • Photography
  • Optical Instruments
OBS

most of these forms of (...) are also available on reflex cameras with interchangeable lenses. This involves linking the automatic diaphragm release with the shutter release on the camera.

French

Domaine(s)
  • Photographie
  • Instruments d'optique
OBS

vous affichez d'abord la vitesse d'obturation. Le posemètre agit alors automatiquement sur le diaphragme et l'affiche au moment du déclenchement.

Spanish

Save record 4

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