lens(redirected from aplanatic lens)
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Light rays converge when passing through a biconvex lens (top) and diverge when passing through a biconcave lens (bottom).f indicates the focus.
n. pl. lens·es
1. 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.
2. A combination of two or more such pieces, sometimes with other optical devices such as prisms, used to form an image for viewing or photographing. Also called compound lens.
3. A thin piece of glass or plastic, as on a pair of sunglasses, that transmits light without refraction.
4. A device or phenomenon (such as a gravitational field) that causes light or other radiation to converge or diverge by an action analogous to that of a lens.
a. A transparent, biconvex structure in the eye of a vertebrate or cephalopod that is located between the iris and the vitreous humor and focuses light rays entering through the pupil to form an image on the retina.
b. A similar structure in many invertebrates.
tr.v. lensed, lens·ing, lens·es
1. Informal To make a photograph or movie of.
2. To bend or distort (light, for example) by means of a lens, especially a gravitational field.
[New Latin lēns, from Latin, lentil (from the shape of a double convex lens).]
1. (General Physics) a piece of glass or other transparent material, used to converge or diverge transmitted light and form optical images
2. (General Physics) Also called: compound lens a combination of such lenses for forming images or concentrating a beam of light
3. (General Physics) a device that diverges or converges a beam of electromagnetic radiation, sound, or particles. See electron lens
4. (Anatomy) anatomy See crystalline lens
[C17: from Latin lēns lentil, referring to the similarity of a lens to the shape of a lentil]
Lens(lenz; French lɑ̃s)
(Placename) an industrial town in N France, in the Pas de Calais department; badly damaged in both World Wars. Pop: 36 257 (2006)
n., pl. lens•es.
1. a piece of transparent substance, usu. glass, having two opposite surfaces either both curved or one curved and one plane, used in optical devices for changing the convergence of light rays, as for magnification, or in correcting defects of vision.
2. a combination of such pieces.
3. some analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
4. a doubly convex, transparent body in the eye, behind the pupil, that focuses incident light on the retina.
5. a body of rock or ore that is thick in the middle and thinner toward the edges, similar in shape to a biconvex lens.
[1685–95; < New Latin; Latin lēns a lentil (a lens so called from its shape); compare lentil]
1. A transparent structure behind the iris of the eye that focuses light entering the eye on the retina.
a. A piece of glass or plastic shaped so as to focus or spread parallel light rays that pass through it to form an image.
b. A combination of two or more such lenses used to form an image, as in a camera or telescope. Also called compound lens.
lens- From Latin for "lentil," because of the similarity in shape.
See also related terms for similarity.
1. A device causing light rays or subatomic particles to converge or diverge as they pass through it.
2. A biconvex transparent structure behind the iris. It bends light rays entering the eye and so helps to focus them on the retina.
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|Noun||1.||lens - a transparent optical device used to converge or diverge transmitted light and to form images|
anastigmat - compound lens or lens system designed to be free of astigmatism and able to form approximately point images
anastigmatic lens - a lens designed to correct astigmatism
compound lens - a lens system consisting of two or more lenses on the same axis
contact lens, contact - a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
converging lens, convex lens - lens such that a beam of light passing through it is brought to a point or focus
crown lens - a lens made of optical crown glass
concave lens, diverging lens - a lens such that a parallel beam of light passing through it is caused to diverge or spread out
field lens - the lens that is farthest from the eye in an optical device with more than one lens
Fresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
intraocular lens - an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed
meniscus - (optics) a lens that is concave on one side and convex on the other
eyeglass, monocle - lens for correcting defective vision in one eye; held in place by facial muscles
object glass, object lens, objective lens, objective - the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
optical device - a device for producing or controlling light
optical instrument - an instrument designed to aid vision
|2.||Lens - genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils|
rosid dicot genus - a genus of dicotyledonous plants
|3.||lens - (metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen"|
communication channel, channel, line - (often plural) a means of communication or access; "it must go through official channels"; "lines of communication were set up between the two firms"
|4.||lens - biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina|
organ - a fully differentiated structural and functional unit in an animal that is specialized for some particular function
lens capsule - a tenuous mesoblastic membrane surrounding the lens of the eye
|5.||lens - electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons|
electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)
1. a piece of glass etc curved on one or both sides and used in spectacles, microscopes, cameras etc. I need new lenses in my spectacles; The camera lens is dirty. lens عَدَسَه леща lente sklo, čočka die Linse, die Gläser (pl.), das Objektiv glas; linse; objektiv φακόςlente, objetivo lääts عدسی؛ لنز linssi verre, lentilleעדשה ताल leća lencse lensa linsa lente レンズ 렌즈 lęšis, stiklas lēca; objektīvs kanta lenslinse, objektivsoczewka, obiektyw عدسيه،لنز lente lentilă линза šošovka leča sočivo lins, objektiv เลนส์ mercek, büyüteç, objektif 透鏡 лінза; оптичне скло عدسہ thấu kính 透镜
2. a similar part of the eye. The disease has affected the lens of his left eye. lens عَدَسَة العَيْن леща cristalino čočka die Linse linse κρυσταλλοειδής φακός του ματιού cristalino lääts عدسی linssi cristallinעדשה आंख का ताल leća (szem)lencse lensa mata augasteinn cristallino 水晶体 안구의 수정체 lęšiukas (acs) lēca kanta ooglens linsesoczewka طبيعى د سترګى عدسيه cristalino cristalin хрусталик глаза šošovka leča sočivo lins เลนส์ตา göz merceği 水晶體 кришталик ока آنکھوں کا عدسہ thủy tinh thể 眼睛中的水晶体
lens is singular; the plural is lenses.
lens→ عَدَسَةٌ čočka linse Linse φακός lente linssi lentille leća lente レンズ 렌즈 lens linse soczewka lente линза lins เลนส์ตา lens ống kính 镜头
1. n. lente;
achromatic ___ → ___ acromático;
adherent ___ → ___ adherido;
biconcave ___ → ___ bicóncavo;
biconvex ___ → ___ biconvexo;
bifocal ___ → ___ bifocal;
contact ___ → ___ de contacto, lentillas;
dislocation of ___ → dislocación del ___;
___ implantation, intraocular → ___ -s intraoculares;
trifocal ___ → ___ -s trifocales
2. cristalino, lente transparente del ojo.