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focal surface

См. также в других словарях:

  • Focal surface — For a surface in three dimension the focal surface, surface of centers or evolute is formed by taking the centers of the curvature spheres, which are the tangential spheres whose radii are the reciprocals of one of the principal curvatures at the …   Wikipedia

  • focal surface — židinių paviršius statusas T sritis fizika atitikmenys: angl. focal surface vok. Brennfläche, f; Fokalfläche, f rus. фокальная поверхность, f pranc. surface focale, f …   Fizikos terminų žodynas

  • Focal — may refer to:*Focal (lexicographical website), an Irish lexicographical website *FOCAL (programming language) **FOCAL 69 **Focal (HP 41) *Relating to focusee also*Focal point (disambiguation) *Focal adhesion *Focal character *Focal dystonia… …   Wikipedia

  • surface focale — židinių paviršius statusas T sritis fizika atitikmenys: angl. focal surface vok. Brennfläche, f; Fokalfläche, f rus. фокальная поверхность, f pranc. surface focale, f …   Fizikos terminų žodynas

  • focal — focal, ale, aux [ fɔkal, o ] adj. et n. f. • 1812; du lat. focus « foyer » 1 ♦ Phys. Qui concerne le foyer, les foyers d un instrument d optique. ⇒ bifocal. Axe focal, plan focal. N. f. Distance focale. Objectif à focale variable. ⇒ zoom. 2 ♦… …   Encyclopédie Universelle

  • Focal — Fo cal, a. [Cf. F. focal. See {Focus}.] Belonging to,or concerning, a focus; as, a focal point. [1913 Webster] {Focal distance, or length, of a lens or mirror} (Opt.), the distance of the focus from the surface of the lens or mirror, or more… …   The Collaborative International Dictionary of English

  • Focal distance of a telescope — Focal Fo cal, a. [Cf. F. focal. See {Focus}.] Belonging to,or concerning, a focus; as, a focal point. [1913 Webster] {Focal distance, or length, of a lens or mirror} (Opt.), the distance of the focus from the surface of the lens or mirror, or… …   The Collaborative International Dictionary of English

  • Focal distance or length of a lens or mirror — Focal Fo cal, a. [Cf. F. focal. See {Focus}.] Belonging to,or concerning, a focus; as, a focal point. [1913 Webster] {Focal distance, or length, of a lens or mirror} (Opt.), the distance of the focus from the surface of the lens or mirror, or… …   The Collaborative International Dictionary of English

  • focal length — leŋ(k)th n the distance of a focus from the surface of a lens or concave mirror symbol f * * * the distance between a lens and an object from which all rays of light are brought to a focus. Symbol f …   Medical dictionary

  • Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

  • Focal — Distance focale Cet article fait partie de la série Photographie …   Wikipédia en Français

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