An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 3 Search : isoplanatic
isoplanatic
  ایزوبیراه   
izobirâh

Fr.: isoplanatique   

The quality of an imaging system which is characterized by → isoplanatism.

From → iso- "equal, uniform" + Gk. plane "wandering," from planasthai "to wander" + -tic adjective-forming suffix, → -ic.

Izobirâh, from izo-, → iso-, + birâh "a devious path; a wanderer, who deviates, errs."

isoplanatic angle
  زاویه‌ی ِ ایزوبیراه   
zâviye-ye izobirâh

Fr.: angle isoplanatique   

The angle in which the → point spread function of the atmosphere/telescope system is space invariant. Because of the presence of → turbulence in high layers of the atmosphere, this angle is extremely small, often only a few seconds of arc at visible wavelengths. See also → aplanatism.

isoplanatic; → angle.

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.

isoplanatic; → patch.