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dioptre
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Dioptre - Wikipedia
A dioptre (British spelling) or diopter (American spelling), symbol dpt or D, is a unit of measurement with dimension of reciprocal length.
en.wikipedia.org
en.wikipedia.org
DIOPTRE | definition in the Cambridge English Dictionary
a unit of measurement of the power of a lens, used for measuring a person's eyesight: A typical short-sighted person in Britain is -4.5 dioptres ...
dictionary.cambridge.org
dictionary.cambridge.org
What Is a Diopter? | Warby Parker
A diopter is a unit of measurement that represents the optical strength of a lens. The optical power is the reciprocal, or inverse, of the focal length.
www.warbyparker.com
www.warbyparker.com
dioptre
dioptre (daɪˈɒptə(r)) [The usual spelling in Great Britain of diopter in sense 5.] A unit for expressing the power of a lens, equal to the reciprocal of its focal length in metres.[1876 Compte-rendu: Congrès internat. des Sciences médicales 1875 (Brussels) 610 L'unité du système métrique, c'est le m...
Oxford English Dictionary
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Dioptre - MyHealth Alberta
The dioptre is a unit of measurement used to describe how well a person sees. Farsightedness is measured in positive dioptres, and nearsightedness is measured ...
myhealth.alberta.ca
myhealth.alberta.ca
Optical diopters: Lens strength, meaning and more - All About Vision
A diopter is a unit used to calculate the focusing strength of a pair of glasses or contact lenses. And it is the measurement unit for an optical prescription.
www.allaboutvision.com
www.allaboutvision.com
Diopter (disambiguation) - Wikipedia
In modern usage, diopter or dioptre is a measure of the optical power of an optical system. Diopter may also refer to: Historically, a dioptric lens; Any ...
en.wikipedia.org
en.wikipedia.org
Dioptre and Magnification explained - The Daylight Company
Dioptre refers to the curvature of the lens. As the dioptre increases, the lens become thicker and the curvature greater. As the curvature ...
daylightcompany.com
daylightcompany.com
dioptre - Metric System
The dioptre, symbol D, is a non-SI unit of measurement of the optical power of a lens or curved mirror. The dioptre is not accepted for use with the SI. One ...
metricsystem.net
metricsystem.net
Dioptre - Definition, Meaning & Synonyms - Vocabulary.com
a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists.
www.vocabulary.com
www.vocabulary.com
Define 1 dioptre of power of a lens. - CK-12
1 dioptre (D) is the unit of measurement for the optical power of a lens. It is defined as the inverse of the focal length (f) of the lens, measured in meters.
www.ck12.org
www.ck12.org
Diopter (disambiguation)
In modern usage, diopter or dioptre is a measure of the refractive power of an optical system.
wikipedia.org
en.wikipedia.org
diopter
diopter (daɪˈɒptə(r)) Also in Lat. form dioptra. [a. F. dioptre (1547 in Hatz.-Darm.), ad. L. dioptra, a. Gr. δίοπτρα an optical instrument for measuring heights, levelling, etc.; cf. also Gr. δίοπτρον spying-glass, f. δι-, δια- through + stem ὀπ- to see + instrumental suffix, -τρα, -τρον.] 1. An an...
Oxford English Dictionary
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Dioptrics
See also
Diopter/Dioptre (unit of measurement)
Dioptrice (work by Johannes Kepler)
Catoptrics (study of and optical systems utilizing reflection)
Catadioptrics
wikipedia.org
en.wikipedia.org
Dioptra
A dioptra (sometimes also named dioptre or diopter, from ) is a classical astronomical and surveying instrument, dating from the 3rd century BC.
wikipedia.org
en.wikipedia.org