Lens

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Look up lens in Wiktionary, the free dictionary.

Lens can refer to:

[edit] 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 Category:Photographic lenses
  • Sunglass lenses, which are light-attenuating elements

[edit] Focussing of other radiation and forces

• Gravitational lens, a massive astronomical object which bends the light from objects beyond it, therefore making an illusion.
• 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

[edit] 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

[edit] 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

[edit] 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

[edit] Names of people

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

[edit] Acronyms

• Laser engineered net shaping, a rapid prototyping technology capable of building fully-dense metal parts

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