- a piece of transparent substance, usually glass, having two opposite surfaces either both curved or one curved and one plane, used in an optical device in changing the convergence of light rays, as for magnification, or in correcting defects of vision.
- a combination of such pieces.
- some analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
- Anatomy. crystalline lens.
- Geology. a body of rock or ore that is thick in the middle and thinner toward the edges, similar in shape to a biconvex lens.
- Movies. to film (a motion picture).
Origin of lens
Examples from the Web for lenses
Contemporary Examples of lenses
So we got a compressor and we would literally pump air into each of the four cameras so we could blow water off the lenses.‘Noah’ is a Global Warming Epic About the Battle Between Religion and Science, Says Cinematographer
March 27, 2014
One reason for that is filmmakers shot with 16mm lenses on hand-cranked cameras for optimum authenticity.Who Invented the ‘Teenager’?
March 14, 2014
There are lenses discretely built in watches, ties, cigarettes, lighters, and other forms of disguise.Exposed: Paparazzi vs. the Stars Over the Past 50 Years
February 27, 2014
All lenses project circles; most cameras cut a square or rectangular image out of the middle of the optical pie.New Orleans' Hidden Violence
January 28, 2011
The tops of the lenses were tinted blue and the bottoms tinted pink.Do I Have to Read Sue Grafton?
December 21, 2009
Historical Examples of lenses
The oculist from whom you obtained your lenses will tell you their magnifying power.
The Argand lamp of 1812 was not at all powerful and the lenses used were far from perfect.Steve and the Steam Engine
Sara Ware Bassett
Finally the lenses have to be centred, an essential operation in this case.On Laboratory Arts
She looked through the lenses and gave a cry of astonishment.Giants on the Earth
Sterner St. Paul Meek
Pupils, lights and lenses, all came to a glittering focus on me.Man Made
Albert R. Teichner
- a piece of glass or other transparent material, used to converge or diverge transmitted light and form optical images
- Also called: compound lens a combination of such lenses for forming images or concentrating a beam of light
- a device that diverges or converges a beam of electromagnetic radiation, sound, or particlesSee electron lens
- anatomy See crystalline lens
Word Origin for lens
- an industrial town in N France, in the Pas de Calais department; badly damaged in both World Wars. Pop: 36 206 (1999)
1690s, "glass to regulate light rays," from Latin lens (genitive lentis) "lentil," on analogy of the double-convex shape. See lentil. Of the eye from 1719.
In the vernacular of the photographer, anyone crowding to the front of a group, staring into the lens, or otherwise attracting attention to himself is known as a "lens louse." ["American Photography," vol. 40, 1946; the term dates from 1915]
- A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of which light rays are refracted so that they converge or diverge to form an image.
- A transparent, biconvex body of the eye between the iris and the vitreous humor that focuses light rays entering through the pupil to form an image on the retina.
- A transparent structure behind the iris of the eye that focuses light entering the eye on the retina.
- A piece of glass or plastic shaped so as to focus or spread light rays that pass through it, often for the purpose of forming an image.
- A combination of two or more such lenses, as in a camera or telescope. Also called compound lens
- A device that causes radiation to converge or diverge by an action analogous to that of an optical lens. The system of electric fields used to focus electron beams in electron microscopes is an example of a lens.