IRIS DIAPHRAGM


Meaning of IRIS DIAPHRAGM in English

Optics, Photog.

a composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system. Also called iris .

[ 1885-90 ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .