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Schéma de principe du télescope de Newton.

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.

Auteur/author : Christophe Dang Ngoc Chan (cdang

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