Les rayons parallèles, venant de l'« infini », sont focalisés par un miroir parabolique ou sphérique. Puis, ils sont déviés sur le côté par un miroir plan, orienté à 45° par rapport à l'axe optique du télescope.
Principle of a Newton telescope.
The parallel beam, coming from far, far away, are focalised by a parabolic ou spherical mirror. They are then reflected by a mirror tilted by an angle of 45° compared to the axis of the main mirror.
This diagram image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.
It is recommended to name the SVG file “Telescope newton schema.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue