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Lens

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	Lens can refer to: In optics Lens (optics) Lens (optics) A lens is an optics device with perfect or approximate axial symmetry which transmittance and refraction light, converging or diverging the beam.... , an optical element which converges or diverges light Lens (anatomy) Lens (anatomy) The lens is a transparent, Lens_#Types_of_lenses structure in the eye that, along with the cornea, helps to refract light to be Focus on the retina.... , a part of the eye Corrective lens Corrective lens A corrective lens is a lens worn in front of the eye, mainly used to treat myopia, hyperopia, Astigmatism , and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.... for correction of human vision Contact lens Contact lens A contact lens is a corrective lens, cosmetics, or therapeutic lens usually placed on the cornea of the eye. Modern soft contact lenses were invented by the Czech Republic chemists Otto Wichterle and Drahoslav L?m, who also invented the first gel used for their production.... , placed on the cornea of the eye Photographic lens Photographic lens A photographic lens is an optics lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.... , a lens designed for use on a camera. See also :Category:Photographic lenses Sunglass lenses Sunglasses Sunglasses or sun glasses are a visual aid, variously termed spectacles or glasses, which feature lenses that are coloured or darkened to prevent strong light from reaching the eyes.... , which are light-attenuating elements Focussing of other radiation and forces Gravitational lens Gravitational lens A gravitational lens is formed when the light from a very distant, bright source is "bent" around a massive object between the source object and the observer.... , a massive astronomical object which bends the light from objects beyond it, therefore making an illusion. Electrostatic lens Electrostatic lens An electrostatic lens is a device that assists in the transport of charged particles. For instance, it can guide electrons emitted from a sample to an electron analyzer, analogous to the way an lens assists in the transport of light in an optical instrument.... , a device used to focus or collimate electron beams Explosive lens Explosive lens An explosive lens?as used, for example, in nuclear weapons?is a highly specialized explosive charge. In general, it is a device composed of several explosive charges that are shaped in such a way as to change the shape of the detonation wave passing through it; conceptually similar to the effect of an optical lens on light.... , 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 Slotted waveguide A slotted waveguide is a waveguide that is used as an Antenna in microwave radar applications. Prior to its use in surface search radar, such systems used a parabola segment reflector.... antennas Lens (lentil) shape The word lens originally comes from the Latin word for lentil Lentil The lentil or daal or pulse is a bushy annual plant of the Fabaceae family, grown for its lens-shaped seeds. It is about 15 inches tall and the seeds grow in pods, usually with two seeds in each.... , since biconvex lenses are lentil-shaped. Lens (genus) Lens (genus) The genus *Lens* of the legume family Fabaceae contains four species of small, erect or climbing herbs with pinnate Leaf and small inconspicuous white flowers and small flattened pods.... , the genus of the lentil plant Lens (geometry) Lens (geometry) In geometry, a lens is a convex shape comprising two circle Arc s, joined at their endpoints. If the arcs have equal radii, it is called a symmetric lens.... , a geometric shape formed from two arcs Lens (geology) Lens (geology) In geology a lens is a body of ore or Rock or a deposit that is thick in the middle and thin at the edges, resembling a convex lens in cross-section.... , 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 Perspective (cognitive) Perspective in theory of cognition is the choice of a wiktionary:context or a reference from which to sense, categorize, Measurement or codify experience, cohesively forming a coherent belief, typically for comparing with another.... a fictional alien device in E. E. Smith's Lensman Lensman The Lensman series is a serial science fiction space opera by E. E. Smith. It was a runner-up for the Hugo award for best All-Time Series.... series, which gives its bearer telepathic and other abilities a user-created page on the website Squidoo Squidoo Squidoo is a community website based in Irvington, N.Y. that allows users to create pages for subjects of interest. Lenses are interactive, and can contain Flickr photos, Google maps, blogs, eBay auctions, YouTube videos, and other links.... Place names Arrondissement of Lens Arrondissement of Lens The arrondissement of Lens is an Arrondissements of France of northern France, located in the Pas-de-Calais Departments of France, in the Nord-Pas de Calais Regions of France.... , in the département of Pas-de-Calais, France Lens, Pas-de-Calais Lens, Pas-de-Calais Lens is a Communes of France in the Pas-de-Calais Departments of France in northern France. It is one of France's large Picard languagee cities along with Lille, Valenciennes, Amiens, Roubaix, Tourcoing, Arras, and Douai.... , a commune in that arrondissement RC Lens RC Lens Racing Club de Lens is a France football club which plays in the northern city of Lens, Pas-de-Calais, in the Pas-de-Calais d?partement. Its nickname, sang et or , comes from its traditional colours of red and gold.... , its football (soccer) club Lens, Belgium Lens, Belgium Lens is a Wallonia municipality located in the Belgium province of Hainaut . On January 1 2006 Lens had a total population of 3,974. The total area is 49.42 square kilometre which gives a population density of 80 inhabitants per km?.... Lens, Valais Lens, Valais Lens is a Municipalities of Switzerland in the district of Sierre in the Cantons of Switzerland of Valais in Switzerland.It is located near Crans-Montana.... , Switzerland Names of people Louis Lens Louis Lens Louis Lens, son of rose-breeder Victor Lens , deceased on 10/05/2001, was the most esteemed rose breeder in the Benelux countries.The roses introduced by himself and his still active nursery, NV Louis Lens, at Oudenburg near Bruges, Belgium , outnumber David Austin's 190, and though never nearly as successful abroad, they grow an excellent... , Flemish rose breeder Nicholas Lens Nicholas Lens The multi-disciplinary artist Nicholas Lens is a contemporary Belgian author/composer and Film director.Nicholas Lens was born in Ypres, a small provincial town near the France border in Flanders, Belgium.... , Belgian composer Acronyms Laser Engineered Net Shaping Laser engineered net shaping Laser engineered net shaping or LENS is a technology developed by Sandia National Laboratories for fabricating metal parts directly from a computer-aided design solid model by using a metal powder injected into a molten pool created by a focused, high-powered laser beam.... , a rapid prototyping technology capable of building fully-dense metal parts