Difference between revisions of "Lens"
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==Origin== | ==Origin== | ||
Special use of [[Latin]] lēns a lentil (from its shape) | Special use of [[Latin]] lēns a lentil (from its shape) | ||
− | *[ | + | *[https://en.wikipedia.org/wiki/17th_century 1693] |
==Definitions== | ==Definitions== | ||
*1. A piece of [[glass]], or other [[transparent]] substance, with two curved [[surfaces]], or one plane and one curved surface, serving to cause regular [[convergence]] or divergence of the [[rays]] of [[light]] passing through it. | *1. A piece of [[glass]], or other [[transparent]] substance, with two curved [[surfaces]], or one plane and one curved surface, serving to cause regular [[convergence]] or divergence of the [[rays]] of [[light]] passing through it. | ||
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*3. ''[[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. | *3. ''[[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. | ||
==Description== | ==Description== | ||
− | A '''lens''' is an [[optical]] device with [[perfect]] or approximate axial [[symmetry]] which [[transmits]] and [[refracts]] [[light]], converging or diverging the beam. A simple lens consists of a single optical element. A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple [[elements]] allows more optical aberrations to be corrected than is possible with a single element. Lenses are typically made of [[glass]] or [[transparent]] plastic. Elements which refract [[electromagnetic]] [[radiation]] outside the visual [[spectrum]] are also called lenses: for instance, a [ | + | A '''lens''' is an [[optical]] device with [[perfect]] or approximate axial [[symmetry]] which [[transmits]] and [[refracts]] [[light]], converging or diverging the beam. A simple lens consists of a single optical element. A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple [[elements]] allows more optical aberrations to be corrected than is possible with a single element. Lenses are typically made of [[glass]] or [[transparent]] plastic. Elements which refract [[electromagnetic]] [[radiation]] outside the visual [[spectrum]] are also called lenses: for instance, a [https://en.wikipedia.org/wiki/Microwave microwave] lens can be made from [https://en.wikipedia.org/wiki/Paraffin_wax paraffin wax].[https://en.wikipedia.org/wiki/Lens_%28optics%29] |
[[Category: Physics]] | [[Category: Physics]] |
Latest revision as of 01:20, 13 December 2020
Origin
Special use of Latin lēns a lentil (from its shape)
Definitions
- 1. A piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved surface, serving to cause regular convergence or divergence of the rays of light passing through it.
- 2. some analogous device, as for affecting sound waves, electromagnetic radiation, or streams of electrons.
- 3. 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.
Description
A lens is an optical device with perfect or approximate axial symmetry which transmits and refracts light, converging or diverging the beam. A simple lens consists of a single optical element. A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple elements allows more optical aberrations to be corrected than is possible with a single element. Lenses are typically made of glass or transparent plastic. Elements which refract electromagnetic radiation outside the visual spectrum are also called lenses: for instance, a microwave lens can be made from paraffin wax.[1]