Lens


Lens

Lens can refer to:__NOTOC__

In optics

*Lens (optics), an optical element which converges or diverges light
**Lens (anatomy), a part of the eye
**Corrective lens for correction of human vision
***Contact lens, placed on the cornea of the eye
**Photographic lens, a lens designed for use on a camera. See also
**Sunglass lenses, which are light-attenuating elements

Focussing of other radiation and forces

*Gravitational lens, a massive astronomical object which bends the light from objects beyond it
*Electrostatic lens, a device used to focus or collimate electron beams
*Explosive lens, a shaped explosive charge with focussed blast used primarily in nuclear weapons
*Acoustic lens, a mechanical device used in loudspeaker design to improve the dispersion of high frequencies
*Microwave lens, used to focus microwave radiation and often employed in slotted waveguide antennas

Lens (lentil) shape

"The word "lens" originally comes from the Latin word for "lentil", since biconvex lenses are lentil-shaped."
*Lens (genus), the genus of the lentil plant
*Lens (geometry), a geometric shape formed from two arcs
*Lens (geology), a body of ore or rock that is thick in the middle and thin at the edges
*Lens (groundwater), a layer of fresh water derived from rainfall, overlying saline groundwater

Other uses

* a metaphor for a point of view
* a fictional alien device in E. E. Smith's Lensman series, which gives its bearer telepathic and other abilities
* a user-created page on the website Squidoo

Place names

*Arrondissement of Lens, in the "département" of Pas-de-Calais, France
**Lens, Pas-de-Calais, a "commune" in that arrondissement
***RC Lens, its football (soccer) club
*Lens, Belgium
*Lens, Valais, Switzerland

Names of people

*Louis Lens, Flemish rose breeder
*Nicholas Lens, Belgian composer

Acronyms

*Laser Engineered Net Shaping, a rapid prototyping technology capable of building fully-dense metal parts


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Look at other dictionaries:

  • Lens — (l[e^]nz), n.; pl. {Lenses} ( [e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. {Lentil}.] (Opt.) A piece of glass, or other transparent substance, ground with two opposite… …   The Collaborative International Dictionary of English

  • LENS — La ville de Lens comptait en 1990 35 278 habitants et celle de Liévin 34 012. Il s’agit en réalité d’un ensemble de communes qui englobent le quart du bassin minier. Sur le site de passage entre la France et les bas pays, dominée par les hauteurs …   Encyclopédie Universelle

  • lens — [lenz] n [Date: 1600 1700; : Latin; Origin: lentil ; because of its shape] 1.) the part of a camera through which the light travels before it reaches the film ▪ a standard 50mm lens 2.) a piece of curved glass or plastic which makes things look… …   Dictionary of contemporary English

  • lens — (n.) 1690s, glass to regulate light rays, from L. lens (gen. lentis) lentil, on analogy of the double convex shape. See LENTIL (Cf. lentil). Of the eye from 1719. In the vernacular of the photographer, anyone crowding to the front of a group,… …   Etymology dictionary

  • lens — [ lenz ] noun count * 1. ) a thin piece of curved glass or plastic that makes things seem smaller, bigger, or clearer: eyeglasses with thick lenses a ) a piece of equipment that is part of a camera: a camera with a telescopic lens 2. ) the part… …   Usage of the words and phrases in modern English

  • Lens —   [lãs], Stadt im Département Pas de Calais, im Kohlenrevier Nordwestfrankreichs, 38 m über dem Meeresspiegel, 35 000 Einwohner; Steinkohlenbergbau, Kokerei, Stahl und Konfektionsindustrie.   Geschichte:   Lens wurde im Ersten Weltkrieg stark… …   Universal-Lexikon

  • LENS — Graece φακῆ, tenuiorum et Philosophorum cibus, Cynicorum praesertim, olim fuit, cuius encomium vide apud Athen. l. 4. c. 18. Sed et edulio eius tantopere in sacris Esavus legitur gavisus, ut iure primogentiurae illud redimere profanus homo non… …   Hofmann J. Lexicon universale

  • lens — [lenz] n. [L, lentil: from the resemblance to the shape of a lentil] 1. a) a piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved, regularly bringing together or spreading rays of light passing… …   English World dictionary

  • Lens [1] — Lens (lat.), 1) Linse; 2) (L. crystallĭna), Krystalllinse, s.u. Auge …   Pierer's Universal-Lexikon

  • Lens [2] — Lens, s.u. Lenspumpen …   Pierer's Universal-Lexikon


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