TERMIUM Plus®

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

COUCHE ANTI-HALO [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-03-18

English

Subject field(s)
  • Photography
  • Mathematical Geography
DEF

Halo formed round the image of bright points on negatives [and produced] by the reflection of scattered image light from the bottom of the support.

OBS

[Halation can be] seen in night photographs including street lamps and largely prevented by light absorbing coatings on the back plates.

French

Domaine(s)
  • Photographie
  • Géographie mathématique
DEF

Auréole qui entoure une image photographique d’un point brillant.

OBS

On y pare en étendant au dos de la couche sensible une couche de matière anti-diffusante dite «anti-halo».

Spanish

Save record 1

Record 2 1999-02-23

English

Subject field(s)
  • Photography
  • Photoengraving
DEF

A coating or dye usually applied to the back of a film to absorb the light passing through the emulsion, thereby eliminating reflections from the supporting surface.

OBS

If the light is not absorbed, some of it is reflected and falls on the underside of the emulsion layer, causing halation [unwanted light reflection]. This coating is usually removed during processing.

Key term(s)
  • antihalo layer

French

Domaine(s)
  • Photographie
  • Photogravure
DEF

Dépôt mince absorbant ou antiréfléchissant [...] sur un support de couche photosensible; arrête les rayonnements susceptibles de produire du halo à l’intérieur de la couche.

OBS

couche anti-halo : terme normalisé par l'AFNOR.

Key term(s)
  • couche antireflet
  • couche anti-reflet

Spanish

Save record 2

Record 3 1999-02-23

English

Subject field(s)
  • Photography
  • Types of Documentation (Library Science)
  • Cinematography
DEF

A layer on the back of a film base that counteracts curling and halation, i.e. unwanted light reflection.

CONT

A backing layer on the rear of the film base counteracts curling. Usually it contains also a nearly opaque dye to suppress light reflection on the rear support surface. Such reflection (halation) reduces definition by causing halolike effects around very bright image points.

Key term(s)
  • pelloid

French

Domaine(s)
  • Photographie
  • Documentation (Bibliothéconomie)
  • Cinématographie
DEF

Couche à l'arrière du support de film d’une pellicule photographique qui empêche la pellicule de rouler tout en agissant comme couche anti-halo, c'est-à-dire anti-réfléchissante.

OBS

Ne pas confondre «couche dorsale» et «sous-couche». La couche dorsale respecte le schéma suivant : émulsion-support-dorsale, alors que la sous-couche occupe la position intermédiaire du schéma émulsion-sous-couche-support. Dorsale et sous-couche ne diffèrent en fait que par l’emplacement, car elles remplissent exactement le même rôle antiréfléchissant ou antihalo.

Spanish

Save record 3

Record 4 1985-12-16

English

Subject field(s)
  • Micrographics
DEF

a layer usually made of gelatin, applied to the side of the film base opposite that of the emulsion to prevent curl. It is comparable to the emulsion layer in thickness and is not removed in processing. (Antihalation or other layers removed in processing are excluded from this definition).

French

Domaine(s)
  • Micrographie
DEF

couche, ordinairement constituée de gélatine, appliquée sur le côté du support opposé à l'émulsion, afin d’empêcher l'incurvation du film. Son épaisseur se compare à celle de l'émulsion et elle n’ est pas éliminée au cours des traitements.(Les couches anti-halo ou autres qui sont éliminées au cours des traitements ne sont pas incluses dans cette définition).

Spanish

Save record 4

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TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
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