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MIROIR PRIMAIRE [5 records]

Record 1 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

Save record 1

Record 2 1993-04-01

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
OBS

Source: ESA Bulletin, August 1989.

French

Domaine(s)
  • Installations et instruments (Astronomie)
OBS

Source: Bulletin de l'Agence spatiale européenne, août 1989.

OBS

Source : DSTM [Direction des services de traduction ministériels] Communications.

Spanish

Save record 2

Record 3 1986-11-14

English

Subject field(s)
  • Optics
  • Guns (Land Forces)
Key term(s)
  • primary-stabilized head mirror

French

Domaine(s)
  • Optique
  • Canons (Forces terrestres)

Spanish

Save record 3

Record 4 1976-06-19

English

Subject field(s)
  • Optics

French

Domaine(s)
  • Optique

Spanish

Save record 4

Record 5 1976-06-19

English

Subject field(s)
  • Optics

French

Domaine(s)
  • Optique
OBS

(télescope)

Spanish

Save record 5

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