TERMIUM Plus®

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OPTICAL AID [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-02-25

English

Subject field(s)
  • Special Education
  • The Eye
CONT

optical aids for the partially sighted. Apparatus which enables the partially sighted to receive almost as much visual information as those with normal vision.

Key term(s)
  • aid to vision

French

Domaine(s)
  • Éducation spéciale
  • Oeil
CONT

aides optiques pour amblyopes. Appareils à l'aide desquels les amblyopes ont la possibilité de recevoir une information visuelle dans une mesure très proche de celle que donne la vision normale.

Spanish

Save record 1

Record 2 2011-01-31

English

Subject field(s)
  • Chemical Elements and Compounds
  • Industrial Ceramics
Universal entry(ies)
CeO2
formula, see observation
CONT

Cerium oxide is insoluble in water and soluble in mineral acids.... Applications in the glass field include use in medical tubing for UV protection and in color TV face plates for antibrowning. It is used in optical filters... in gamma radiation shielding glass... in glass polishing compounds... In the automotive catalytic converter, it is used to stabilize alumina in the alpha phase. [It] is being considered as a sintering aid for silicon nitride....

OBS

Chemical formula: CeO2

French

Domaine(s)
  • Éléments et composés chimiques
  • Céramiques industrielles
Entrée(s) universelle(s)
CeO2
formula, see observation
CONT

[...] le développement de la production de terres rares [...] conduit à une disponibilité accrue de l'oxyde de cérium, CeO2, [...] parmi les valorisations possibles de CeO2 - dont les usages actuels sont essentiellement le polissage du verre, et sa décoloration - pourrait figurer son emploi comme stabilisant de la zircone [...]

OBS

Formule chimique : CeO2

Spanish

Save record 2

Record 3 2006-10-05

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Target Acquisition
Key term(s)
  • optical target acquisition aid

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Acquisition d'objectif

Spanish

Save record 3

Record 4 2001-11-26

English

Subject field(s)
  • Writing Instruments
  • Technical Aids for Persons with Disabilities
OBS

ISO code: 21 27.

Key term(s)
  • non optical reading aid

French

Domaine(s)
  • Instruments d'écriture
  • Aides techniques pour personnes handicapées
OBS

Code ISO : 21 27.

Spanish

Save record 4

Record 5 1998-05-14

English

Subject field(s)
  • Analytical Chemistry
CONT

Flame Emissivity Detector. Another detector based on monitoring a specific property of a flame, its emissivity, was developed by Grant, who mixed coal gas in constant proportions with the effluent from a chromatographic column; this coal gas/effluent mixture burned at a wide stainless steel jet. The emissivity of the flame, changing as the flame's carbon content is varied, is measured with the aid of a metal reflector, glass condensing lens, and selenium photocell; these are held in place from each other at their proper optical distances.... For low background emissivity values, response is nonlinear. However, by controlling the coal gas flow rate to maintain emissivity between 0. 60 and 0. 80 mV, detector response is linear over a wide temperature range.

OBS

For the determination of combustible components of organic origin in gas chromatographic effluents, various principles of detection based on flame reactions have been utilized, namely, the hydrogen flame temperature, flame emissivity, and flame ionization detectors. In all reported systems, specific flame properties were monitored. Whereas Scott measured the flame temperature of the exit gas at a small jet and Grant the flame’s emissivity by optical means, Mc William and Dewar and Harley et al. advanced new detection concepts based on the electrical or ionization properties of hydrogen/oxygen flames.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 5

Record 6 1975-03-11

English

Subject field(s)
  • Planets
  • General Scientific and Technical Vocabulary
  • Astronomy
OBS

several comets are detected annually, but the majority are not visible without optical aid.

French

Domaine(s)
  • Planètes
  • Vocabulaire technique et scientifique général
  • Astronomie
OBS

la désignation provisoire qu'on leur donne, dès leur découverte, comprend le ou les noms de ceux qui l'ont trouvée

Spanish

Save record 6

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