TERMIUM Plus®

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MIRROR TUBE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2021-10-19

English

Subject field(s)
  • Scientific Instruments
  • Optical Instruments
CONT

The refractometer comprises a hinged plastic plate, a prism..., a calibration screw, a mirror tube, and an eyepiece.

French

Domaine(s)
  • Instruments scientifiques
  • Instruments d'optique

Spanish

Save record 1

Record 2 2004-10-19

English

Subject field(s)
  • Mirrors
  • Optical Instruments
  • Optics
DEF

... the principal light-gathering surface of a reflective telescope.

CONT

The primary mirror is located at the lower end of the telescope tube in a reflector and has its front surface coated with an extremely thin film of metal, such as aluminum. The back of the mirror is usually made of glass, although other materials have been used from time to time. Pyrex(trademark) was the principal glass of choice for many of the older large telescopes, but new technology has led to the development and widespread use of a number of glasses with very low coefficients of expansion.

French

Domaine(s)
  • Glaces et miroiterie
  • Instruments d'optique
  • Optique
CONT

On peut citer quelques formules optiques : le télescope de type Newton, qui utilise un miroir primaire concave sphérique ou parabolique et un miroir secondaire plan, c'est le montage le plus simple et le plus ancien, utilisé actuellement dans beaucoup de constructions d'amateurs. Il a été mis au point par Isaac Newton, le miroir plan est incliné à 45° et permet de renvoyer l'image focale à 90° de l'axe optique près de l'ouverture du tube.

Spanish

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Record 3 2004-10-04

English

Subject field(s)
  • Scientific Instruments
  • Thermography
DEF

A camera which scans the subject horizontally and vertically by rotating or oscillating mirrors, focusing the collected radiation via a parabolic mirror onto an image intensifier tube which convert temperature variations into either brightness of a phosphor screen display or a cathode ray oscilloscope monitor.

OBS

[Thermal scanning cameras are used] for recording heat distribution in furnaces, machines or over the surface of skin in medical diagnosis.

Key term(s)
  • thermal scan camera

French

Domaine(s)
  • Instruments scientifiques
  • Thermographie

Spanish

Save record 3

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