An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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off-axis optical system
  راژمان ِ نوریک ِ اپ-آسه  
râžmân-e nurik-e ap-âsé
Fr.: système optique hors axe  

An → optical system in which the → optical axis of the → aperture is not coincident with the mechanical center of the aperture.

See also: → off; → axis; → optical; → system.