TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Utilizing two mirrors, a reflector telescope has a concave primary mirror located at the bottom of the telescope. It reflects inbound light to a pinpoint. A second flat mirror set at 45 degrees located below the aperture redirects the light, creating a focal point toward the eyepiece.  4, record 1, English, - reflecting%20telescope

Record number: 1, Textual support number: 1 OBS

There are three main types of reflecting telescopes: the Newtonian telescope, the Cassegrain telescope and the Dobsonian telescope.  5, record 1, English, - reflecting%20telescope

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Les réflecteurs se servent de miroirs au lieu de lentilles pour refléter la lumière sur un foyer : le miroir primaire à l'arrière, gros et incurvé, qui effectue la première focalisation, et le miroir secondaire à l'avant, plus petit, conçu pour rediriger la lumière vers l'œil. Les réflecteurs sont également dotés d'un oculaire.  3, record 1, French, - t%C3%A9lescope

Record number: 1, Textual support number: 1 OBS

Il existe trois principaux télescopes : le télescope de Newton, le télescope de Cassegrain et le télescope de Dobson.  4, record 1, French, - t%C3%A9lescope

Record number: 1, Textual support number: 2 OBS

Ne pas confondre avec la «lunette astronomique», qui est un réfracteur de lumière.  4, record 1, French, - t%C3%A9lescope

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

A shell-shaped or concave recess of reflecting material should be built behind the performers to act as a mirror to throw out the sound on a more or less plane wave-front... If this reflector consists of wood sheathing against the wall, it is well to leave a space by supporting the wood on studs away from the wall.  1, record 2, English, - reflecting%20material

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Type de matériau qui comme une plaque métallique réfléchit les ondes sonores plutôt que de les absorber comme, par exemple, la laine minérale.  2, record 2, French, - mat%C3%A9riau%20r%C3%A9fl%C3%A9chissant

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

1960: Echo 1, first communications balloon satellite, is launched.  2, record 3, English, - communications%20balloon%20satellite

Record number: 3, Textual support number: 1 OBS

Echo 1, a spherical balloon with a metalized skin, was launched by NASA on 12th August 1960. Once in orbit, the balloon was inflated until it reached its intended diameter of 30 metres and it was then used as a reflector to bounce radio signals across the oceans. Echo was simply a radio mirror in the sky, and its efficiency decreased as the gas which inflated the balloon gradually escaped and it lost its shape.  2, record 3, English, - communications%20balloon%20satellite

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

... the principal light-gathering surface of a reflective telescope.  2, record 5, English, - primary%20mirror

Record number: 5, Textual support number: 1 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.  3, record 5, English, - primary%20mirror

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 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.  2, record 5, French, - miroir%20primaire

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

Projector with simple reflector capable of adjusting the divergence by relative movement of lamp and mirror.  3, record 6, English, - reflector%20spotlight

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Projecteur à simple réflecteur ayant une largeur angulaire de faisceau réglable par mouvement relatif de la lampe et du miroir.  2, record 6, French, - projecteur%2Dr%C3%A9flecteur

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

Concave reflector for tungsten lamp having a multiple surface coating which reflects visible light but transmits the infra-red radiation to the outer walls of the reflector. Approximately two thirds of the heat is thus removed from the concentrated light beam.  2, record 7, English, - diathermic%20mirror

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Miroir réfléchissant exclusivement la partie visible du spectre et dispersant l'infrarouge.  1, record 7, French, - miroir%20froid

Record number: 7, Textual support number: 1 CONT

On utilise le miroir froid dans les appareils de projection pour éviter un échauffement excessif du film ou de la diapositive. Certaines lampes de projection à halogène sont pourvues d'un miroir froid [...]  1, record 7, French, - miroir%20froid

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  French

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Three linear concentration systems compared....(a) Fixed mirror concentrator. Required orientation : collector only(b) Parabolic trough. Required orientation :reflector.(c) Faceted mirror strips. Required orientation : rotation of each strip at 7. 5 ° per hour.  1, record 9, English, - fixed%20mirror%20concentrator

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

A shell-shaped or concave recess of reflecting material should be build behind the performers to act as a mirror to throw out the sound on a more or less plane wave-front... If this reflector consists of wood sheathing against the wall, it is well to leave a space by supporting the wood on studs away from the wall. The system then acts like the sounding-board of a pianoforte, being set into forced vibration....  1, record 10, English, - shell%2Dshaped%20recess

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 DEF

Forme semi-circulaire d'une abside (...)  2, record 10, French, - conque

Record number: 10, Textual support number: 1 CONT

Pour assurer une bonne audition on utilisera des grands réflecteurs de sons pour diriger ceux-ci vers l'auditoire. On pourra (...) utiliser des «conques» (...) Toutefois, il existe un grave inconvénient aux conques, relativement à l'orchestre ou aux exécutants; ceux-ci (...) ne s'entendent pas, les rayons sonores étant pour la plupart réfléchis vers l'auditoire.  3, record 10, French, - conque

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  French

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  French

Record 12,  Textual support,  Spanish