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REFLECTION DENSITY [8 records]

Record 1 2016-11-23

English

Subject field(s)
  • Atomic Physics
  • Mathematics
DEF

In transport theory, a mathematical technique which allows integral parameters of a structure(for example, reflection coefficients) to be obtained without giving a detailed description of the neutron flux density in the structure.

OBS

invariant imbedding: term standardized by ISO.

OBS

invariant imbedding: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.

French

Domaine(s)
  • Physique atomique
  • Mathématiques
DEF

Technique mathématique dans la théorie du transport qui permet d'obtenir des paramètres d'intégration relatifs à une structure (par exemple coefficients de réflexion) sans donner une description détaillée du débit de fluence de neutrons dans la structure.

OBS

immersion invariante : terme normalisé par l'ISO.

OBS

immersion invariante : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.

Spanish

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Record 2 2015-04-09

English

Subject field(s)
  • Optics
  • Lithography, Offset Printing and Collotype
DEF

Density as measured by light reflected from the surface, of, for example, a photographic print.

CONT

Transmission density refers to light passed through a transparent image; reflection density to light reflected back through the image by the base support of photographic prints.

French

Domaine(s)
  • Optique
  • Lithographie, offset et phototypie
CONT

La transmittance et la réflectance, ainsi que les valeurs logarithmiques correspondantes, densité par transmission ou par réflexion, ne sont pas, en effet, indépendantes de la géométrie des faisceaux, incidents sur la couche absorbante et émergents ou réfléchis par elle.

Spanish

Save record 2

Record 3 2015-04-09

English

Subject field(s)
  • Optics
  • Lithography, Offset Printing and Collotype
CONT

Transmission density refers to light passed through a transparent image; reflection density to light reflected back through the image by the base support of photographic prints.

French

Domaine(s)
  • Optique
  • Lithographie, offset et phototypie
CONT

La transmittance et la réflectance, ainsi que les valeurs logarithmiques correspondantes, densité par transmission ou par réflexion, ne sont pas, en effet, indépendantes de la géométrie des faisceaux, incidents sur la couche absorbante et émergents ou réfléchis par elle.

Spanish

Save record 3

Record 4 2003-11-20

English

Subject field(s)
  • Mathematical Geography
  • Photography
  • Computer Graphics
OBS

A light-sensitive coating or emulsion which will reproduce a likeness of an image falling on it, usually after an image-development process. The likeness is in the form of variations of reflection or transmission density over a range of greys(black and white) or over a range of dye mixtures(colour). The coating may be sensitive to the whole or only part of the visible spectrum.

Key term(s)
  • photosensitive layer
  • image layer

French

Domaine(s)
  • Géographie mathématique
  • Photographie
  • Infographie
DEF

Dépôt mince à la surface d'un support, d'une substance sensible à un rayonnement ultraviolet, visible ou infrarouge.

Spanish

Campo(s) temático(s)
  • Geografía matemática
  • Fotografía
  • Gráficos de computadora
DEF

Emulsión fotosensible constituida generalmente por gránulos de cloruro o bromuro de plata, de 0.5 a 3 micras de diámetro, dispersados en gelatina.

Save record 4

Record 5 2003-06-12

English

Subject field(s)
  • Measuring Instruments (Engineering)
  • Winemaking
CONT

The density of liquids can be measured with acoustic techniques. This is done by measuring sound velocity and acoustic impedance of the liquid. The presented work describes a novel ultrasonic density sensor that determines the sound reflection coefficient to measure the acoustic impedance of the liquid. It aims to be suitable for industrial applications by achieving a high measurement accuracy while meeting the mechanical and chemical conditions of the process. The high accuracy is obtained with the help of an additional reference measurement inside the sensor.

French

Domaine(s)
  • Instruments de mesure (Ingénierie)
  • Industrie vinicole
CONT

Le Densima X, «le premier capteur de densité à installation simple», selon la société Densiline, permet la mesure en permanence de la densité des liquides contenus dans des cuves ou dans des canalisations à faible débit et à faible pression.

Spanish

Save record 5

Record 6 2003-02-25

English

Subject field(s)
  • Photography
DEF

Light-absorbing quality of a photographic image, expressed as the logarithm of the opacity.

OBS

Several specific types of density values for a photograph may be expressed : diffuse transmission density is the one of greatest importance in the case of photographic transparency materials such as negatives; diffuse reflection density is generally of interest for photographic prints.

OBS

density: term standardized by the CGSB (Canadian General Standards Board) and by the International Electrotechnical Commission.

French

Domaine(s)
  • Photographie
DEF

Absorption de la lumière par une image photographique, exprimée comme le logarithme de l'opacité.

OBS

Il existe plusieurs types précis de densités; il y a la densité de la lumière diffuse transmise qui est l'une des plus importante dans le cas de clichés transparents et la densité de la lumière diffuse réfléchie qu'on utilise généralement pour les épreuves.

OBS

densité : terme normalisé par la Commission électrotechnique internationale.

Spanish

Save record 6

Record 7 2002-11-13

English

Subject field(s)
  • Atomic Physics
  • Plasma Physics
CONT

The usual description of the scattering of radiation is based on the assumption of scattering by individual particles. However, this concept breaks down if the medium becomes ’continuous’, that is if the distance between the scattering particles becomes less than the wavelength of the radiation(analogous to the specular reflection from a surface). The usual effects of scattering(i. e. spatial redistribution of radiation) disappear in this case as the scattering phase function becomes sharply peaked into the forward direction. Density gradients of the medium will then result in a quasi-refraction effect(the refraction of light in the earth's atmosphere is likely to be of this type).

French

Domaine(s)
  • Physique atomique
  • Physique des plasmas

Spanish

Save record 7

Record 8 1996-07-31

English

Subject field(s)
  • Glass Manufacturing
DEF

A process in which a ribbon of hot glass is floated upon a heated liquid of greater density than that of the glass, to produce a transparent glass the two surfaces of which are flat, parallel and fire-polished so that they give clear undistorded vision and reflection.

CONT

float glass process: from the glass tank or furnace, the glass ribbon is delivered onto the surface of liquid metal in the float bath.

Key term(s)
  • float-glass process

French

Domaine(s)
  • Fabrication du verre
DEF

Float ou floatglass. Procédé de fabrication des glaces par extrusion du verre en continu sous forme d'un large ruban (3,50 m), s'étalant à la sortie du four sur un bain d'étain en fusion, sur lequel il se refroidit progressivement avant d'être repris sur coussins d'air.

CONT

Le procédé float. Des chercheurs anglais (Pilkington Brothers) ont mis au point un procédé entièrement original de fabrication de verre plat, le float-glass ou verre flotté. Le principe consiste en l'étalement de la nappe de verre, obtenue à la sortie d'un four à bassin, sur un bain de métal fondu.

Key term(s)
  • flottage du verre

Spanish

Save record 8

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