An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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isoplanatic patch
  پچ ِ ایزوبیراه، تکه‌ی ِ ~  
pac-e izobirâh, teke-ye ~
Fr.: tache isoplanatique  

The spatial region where the variation of the → point spread function of an imaging system is considered negligible.

See also: → isoplanatic; → patch.