- focus rays
- 集聚射线
English-Chinese electron industry dictionary (英汉电子工程大词典). 2013.
focus rays
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Focus (optics) — An image that is partially in focus, but mostly out of focus in varying degrees. In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge.[1] Although the focus is… … Wikipedia
focus — [[t]fo͟ʊsaɪ[/t]] ♦♦ focuses, focusing, focused (The spellings focusses, focussing, focussed are also used. The plural of the noun can be either foci or focuses.) 1) V ERG If you focus on a particular topic or if your attention is focused on it,… … English dictionary
Focus — Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet, after… … The Collaborative International Dictionary of English
Focus tube — Focus Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet,… … The Collaborative International Dictionary of English
focus — [fō′kəs] n. pl. focuses or foci [fō′sī΄] [ModL, adopted in math. senses by KEPLER Johannes (1604) < L, fireplace, hearth < ? IE base * bhok , to flame, burn > ? Arm boc̣, flame] 1. the point where rays of light, heat, etc. or waves of… … English World dictionary
Focus — may refer to:In science, mathematics or computing: *Focus (optics), a point toward which light rays are made to converge **Autofocus, a feature of some optical systems that obtains and maintains correct focus on a target **Focal length, a measure … Wikipedia
focus — ► NOUN (pl. focuses or foci) 1) the centre of interest or activity. 2) the state or quality of having or producing clear visual definition: his face is out of focus. 3) the point at which an object must be situated with respect to a lens or… … English terms dictionary
focus — 1. (F) The point at which the light rays meet after passing through a convex lens. 2. The center, or the starting point, of a disease process. [L. a hearth] conjugate foci two points so related to a lens or … Medical dictionary
focus — /ˈfoʊkəs / (say fohkuhs) noun (plural focuses or foci /ˈfoʊkaɪ/ (say fohkuy), /ˈfoʊki/ (say fohkee), /ˈfoʊsaɪ/ (say fohsuy)) 1. Physics a point at which rays of light, heat, or other radiation, meet after being refracted or reflected. 2. Optics …
focus — I. noun (plural foci; also focuses) Etymology: New Latin, from Latin, hearth Date: 1644 1. a. a point at which rays (as of light, heat, or sound) converge or from which they diverge or appear to diverge; specifically the point where the… … New Collegiate Dictionary
focus — n. & v. n. (pl. focuses or foci) 1 Physics a the point at which rays or waves meet after reflection or refraction. b the point from which diverging rays or waves appear to proceed. Also called focal point. 2 a Optics the point at which an object… … Useful english dictionary
