- 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
- a male given name, form of Leonard.
Examples from the Web for lens
It reminded me a bit of an alternative take on The Wolf of Wall Street—through the Toni and Candace lens.Coffee Talk with Fred Armisen: On ‘Portlandia,’ Meeting Obama, and Taylor Swift’s Greatness
January 7, 2015
The camera dollied backward along the length of the tower's staircase while simultaneously its lens zoomed forward.Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days
December 13, 2014
I see my personal experiences as a lens to look at something much bigger.Meghan Daum On Tackling The Unspeakable Parts Of Life
December 6, 2014
She holds a young girl closely inside her oversized fur coat; both gaze into lens.London’s Pagan Counterculture Kings
October 12, 2014
On the porch, before I go, Peterson looks at me through the lens of a small digital camera before training it on his front lawn.Gosta Peterson's Bohemian Rhapsody: Unpacking a Photographer's '60s Secrets
September 10, 2014
A lens gleamed transparent in the sunlight from the open end.Slaves of Mercury
He uncovered the lens of his dark lantern and turned the ray on Wixy.Philo Gubb Correspondence-School Detective
Ellis Parker Butler
This is exposed to the light that shines through the lens of the camera.
The kind of lens we have been talking about is the convex lens.
Then the lens bends it together again until it comes to a point.
- 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
- an industrial town in N France, in the Pas de Calais department; badly damaged in both World Wars. Pop: 36 206 (1999)
Word Origin and History for lens
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.