An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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circular variable filter (CVF)
  پالایه‌ی ِ ورتنده‌ی ِ پرهونی، ~ ~ دایره‌ای  
pâlâye-ye vartande-ye parhuni, ~ ~ dâyereyi
Fr.: filtre circulaire variable  

Circular band-pass interference filter whose thickness and central wavelength vary along the perimeter. They are used in low-resolution spectrophotometers mainly in the infra-red.

See also: → circular; → variable; → filter.