adjustable iris

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• Iris diaphragm — I ris di a*phragm An adjustable diaphragm, reminiscent of the iris of the eye in its action, by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of… …   The Collaborative International Dictionary of English

• iris — ► NOUN 1) a flat, coloured, ring shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the centre. 2) a plant with sword shaped leaves and purple or yellow flowers. ORIGIN Greek, rainbow, iris …   English terms dictionary

• iris diaphragm — n an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usu. to regulate the aperture of a lens (as in a microscope) …   Medical dictionary

• iris diaphragm — noun diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening • Syn: ↑iris • Hypernyms: ↑diaphragm, ↑stop * * * noun : an adjustable diaphragm of thin opaque plates that can be turned by a… …   Useful english dictionary

• iris — noun 1》 a flat, coloured, ring shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the centre. 2》 a plant with showy flowers, typically purple or yellow, and sword shaped leaves. [Genus Iris: many… …   English new terms dictionary

• adjustable coupling iris — reguliuojamoji diafragma statusas T sritis automatika atitikmenys: angl. adjustable coupling iris vok. regelbare Koppelblende, f rus. регулируемая диафрагма, f pranc. iris réglable, m …   Automatikos terminų žodynas

• iris — n. 1 the flat circular coloured membrane behind the cornea of the eye, with a circular opening (pupil) in the centre. 2 any herbaceous plant of the genus Iris, usu. with tuberous roots, sword shaped leaves, and showy flowers. 3 (in full iris… …   Useful english dictionary

• iris — (or irising)   an earlier cinematographic technique or wipe effect, in the form of an expanding or diminishing circle, in which a part of the screen is blacked out so that only a portion of the image can be seen by the viewer; usually the lens… …   Glossary of cinematic terms

• iris réglable — reguliuojamoji diafragma statusas T sritis automatika atitikmenys: angl. adjustable coupling iris vok. regelbare Koppelblende, f rus. регулируемая диафрагма, f pranc. iris réglable, m …   Automatikos terminų žodynas

• iris diaphragm — 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] * * * …   Universalium

• iris diaphragm — /ˈaɪrəs daɪəfræm/ (say uyruhs duyuhfram) noun 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, iris …