Radioelektronikos terminų žodynas. – Vilnius : BĮ UAB „Litimo“. Kazimieras Gaivenis, Gytis Juška, Vidas Kalesinskas. 2000.
mirror focal distance — veidrodžio židinio nuotolis statusas T sritis radioelektronika atitikmenys: angl. mirror focal distance; mirror focal length vok. Spiegelbrennweite, f rus. фокусное расстояние зеркала, n pranc. distance focale du miroir, f … Radioelektronikos terminų žodynas
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 — 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 — /ˈfoʊkəl lɛŋθ / (say fohkuhl length) noun 1. (of a mirror or lens) the distance from the optical centre to the focal point. 2. (of a telescope) the distance between the object lens and its corresponding focal plane …
focal length — Optics. 1. the distance from a focal point of a lens or mirror to the corresponding principal plane. Symbol: f 2. the distance between an object lens and its corresponding focal plane in a telescope. Also called focal distance. [1745 55] * * * … Universalium
focal length — fo′cal length n. opt the distance from a focal point of a lens or mirror to the corresponding principal plane Also called fo′cal dis tance … From formal English to slang
