An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک



optical axis
  آسه‌یِ نوری  
âse-ye nuri (#)
Fr.: axe optique  

Line passing through the optical center and the center of curvature of a → spherical mirror or → lens. Same as → principal axis.

See also:optical; → axis.