- focal length
- noun Date: 1693 the distance of a focus from the surface of a lens or curved mirror
New Collegiate Dictionary. 2001.
focal length
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focal length — n technical the distance between the centre of a lens and the focal point … Dictionary of contemporary English
focal length — noun count SCIENCE the distance from the center of a LENS or mirror to its focal point … Usage of the words and phrases in modern English
focal length — n. the distance from the optical center of a lens or curved mirror to the point where light rays from a very distant object converge: also focal distance … English World dictionary
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 length — UK / US noun [countable] Word forms focal length : singular focal length plural focal lengths physics the distance from the centre of a lens or mirror to its focal point … English dictionary
focal length — F/A/V abbreviated as FL, it is the distance, in millimeters, between the center of a lens and the point where the image comes into focus. The value given to a lens, stated in inches or millimeters. The shorter the focal length, the wider the… … Audio and video glossary
Focal Length — WikiV The distance from the focal point to the principal point of the lens. The focal length is usually measured in millimeters of the lens. Focal length is an indication of the lens capability to capture a wide angle of view or a narrow view of… … Audio and video glossary
focal length — noun the distance from a lens to its focus • Syn: ↑focal distance • Hypernyms: ↑distance * * * noun, pl ⋯ lengths [count] technical : the distance from the surface of a lens to the point of focus (sense 3) * * * ˌfocal ˈlength [focal length] … Useful english dictionary
focal length — židinio nuotolis statusas T sritis Standartizacija ir metrologija apibrėžtis Atstumas tarp pagrindinės glaudžiamojo lęšio plokštumos ir jo židinio taško. atitikmenys: angl. focal distance; focal length vok. Brennweite, f; Fokalweite, f rus.… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
focal length — židinio nuotolis statusas T sritis Standartizacija ir metrologija apibrėžtis Atstumas tarp plonojo lęšio centro ir židinio. atitikmenys: angl. focal distance; focal length vok. Brennweite, f; Fokalweite, f rus. фокусное расстояние, n pranc.… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
