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ASTIGMATISM [3 records]

Record 1 2012-11-06

English

Subject field(s)
  • Visual Disorders
DEF

An error of refraction in the eye so that rays of light in different meridians cannot be brought to a focus together on the retina.

French

Domaine(s)
  • Troubles de la vision
DEF

Réfraction telle que l'image d'un point objet n'est pas un point simple mais est constituée de deux droites focales.

Spanish

Campo(s) temático(s)
  • Trastornos de la visión
DEF

Defecto refractivo que hace que todo se vea deformado o desenfocado, tanto en visión cercana como en visión lejana.

Save record 1

Record 2 2012-02-13

English

Subject field(s)
  • Optics
  • Photography
DEF

The inability of a lens to bring tangential and radial lines to a common focus.

French

Domaine(s)
  • Optique
  • Photographie
DEF

Défaut d'une lentille causé par la transformation de l'image d'un point en deux droites perpendiculaires.

Spanish

Campo(s) temático(s)
  • Óptica
  • Fotografía
DEF

Aberración que presentan ciertos objetivos y otros sistemas ópticos y que se traduce por una diferencia de nitidez entre las líneas verticales de la imagen y las horizontales.

CONT

El astigmatismo se corrige multiplicando los lentes y usando cristales de composición diferente [...]

Save record 2

Record 3 2012-02-13

English

Subject field(s)
  • Vacuum Tubes (Electronics)
DEF

In an electron-beam tube, a focus defect in which electrons in different axial planes come to focus at different points.

OBS

astigmatism: term officially approved by the Electronics and Telecommunications Terminology Committee.

French

Domaine(s)
  • Tubes et lampes (Électronique)
CONT

L'astigmatisme est un [...] défaut dû à des potentiels incorrects des électrodes. Il se manifeste par un manque de concentration dans un sens, alors que l'autre est net.

OBS

astigmatisme : terme uniformisé par le Comité d’uniformisation des termes de l’électronique et des télécommunications (CUTEL).

Spanish

Campo(s) temático(s)
  • Tubos de vacío (Electrónica)
DEF

Defecto de un oscilógrafo catódico debido a que los electrones del haz inciden en la pantalla con ángulos diferentes y dan en ella, por consiguiente, una imagen borrosa.

Save record 3

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