- Aspherical
Aspherical may refer to:
*
Aspherical space , a concept in topology
*Aspherical lens , a type of lens assembly used in photography which contains an aspheric lens
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Aspherical
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Aspherical space — In topology, an aspherical space is a topological space with all higher homotopy groups equal to {0}. If one works with CW complexes, one can reformulate this condition: an aspherical CW complex is a CW complex whose universal cover is… … Wikipedia
aspherical mirror — asferinis veidrodis statusas T sritis fizika atitikmenys: angl. aspherical mirror vok. asphärischer Spiegel, m rus. асферическое зеркало, n pranc. miroir asphérique, m … Fizikos terminų žodynas
aspherical — adjective see aspheric … New Collegiate Dictionary
aspherical — /ay sfer i keuhl/, adj. Optics. (of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations. Also, aspheric. [1920 25; A 6 + SPHERICAL] * * * … Universalium
aspherical — adjective Not (quite) spherical … Wiktionary
aspherical — adjective not spherical. Derivatives aspheric adjective … English new terms dictionary
aspherical — a•spher•i•cal [[t]eɪˈsfɛr ɪ kəl, eɪˈsfɪər [/t]] also a•spher′ic adj. opt (of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations • Etymology: 1920–25 … From formal English to slang
aspherical — a. (of lens, etc.) free from spherical aberration … Dictionary of difficult words
aspherical — adjective varying slightly from a perfectly spherical shape • Syn: ↑aspheric • Similar to: ↑rounded • Topics: ↑optics … Useful english dictionary
Superzoom — The term hyperzoom or superzoom is used to advertise photographic zoom lenses with unconventionally large focal length factors, typically more than 4× and ranging up to 15×, e.g., 35 mm to 350 mm. The largest ratio for digital SLR cameras is held … Wikipedia
