iris aperture

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• IRIS-T — Allgemeine Angaben Typ: Luft Luft Rakete …   Deutsch Wikipedia

• Iris (anatomy) — Iris The iris is the blue area. The other structures visible are the pupil center and the white sclera surrounding the iris. The overlying cornea is pictured, but not visible, as it is transparent …   Wikipedia

• 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 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 — n. a device consisting of thin, overlapping metal blades that can be adjusted to form an aperture of varying size for camera lenses, etc.: see MICROSCOPE …   English World 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

• Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …   Wikipedia

• Iris — The iris is the circular, colored curtain of the eye. Its opening forms the pupil. The iris helps regulate the amount of light that enters the eye. The eye has a number of other key components. These include the cornea, pupil, lens, retina,… …   Medical 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

• 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 — 1. noun /aɪrɪs/ a) A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms. b) The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and… …   Wiktionary