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dioptre

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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
For example, a 3-dioptre lens brings parallel rays of light to focus at metre. Thus, a thin 2.0-dioptre lens placed close to a thin 0.5-dioptre lens yields almost the same focal length as a single 2.5-dioptre lens. wikipedia.org
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Diopter (disambiguation)
In modern usage, diopter or dioptre is a measure of the refractive power of an optical system. wikipedia.org
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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
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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
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macrophotography
ˌmacrophoˈtography [f. macro- + photography.] Photography in which objects are reproduced larger than or at their actual size but without the degree of magnification that use of a microscope would give.1889 E. J. Wall Dict. Photogr. 114 Macro-photography, a term used to denote the enlargement of the... Oxford English Dictionary
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Ferdinand Monoyer
Ferdinand Monoyer (9 May 1836 – 11 July 1912) was a French ophthalmologist, known for introducing the dioptre in 1872. wikipedia.org
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DPT
DPT may refer to: Science and medicine Dpt (unit) (dioptre/diopter), most commonly a unit measuring refraction and power in a lens or curved mirror Dermatopontin wikipedia.org
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August Müller (inventor)
Refinements in his process led him to be able to correct his own severe -14 dioptre myopia to within 0.50 D. wikipedia.org
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Retinoscopy
. +1.50 dioptre lens for a 67 cm working distance). wikipedia.org
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Albardão Lighthouse
It was painted in dark red and equipped with a 3rd order dioptre lens having a range of . wikipedia.org
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Accommodative insufficiency
Unequal accommodation If there is amplitude of accommodation between the eyes differ 0.5 dioptre or more, it is considered as unequal. Reduction of amplitude of accommodation by 2 dioptre or more is one of the important sign. wikipedia.org
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Reciprocal length
In optics, the dioptre is a unit equivalent to reciprocal metre. wikipedia.org
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Focometer
The individual's refractive power is then read off a linear dioptre scale. The focometer was developed by Drs. wikipedia.org
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