Definitions for DIOPTRE
diop·tre

Princeton's WordNetRate this definition:0.0 / 0 votes

1. diopter, dioptrenoun

   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

WikipediaRate this definition:0.0 / 0 votes

1. Dioptre

   A dioptre (British spelling) or diopter (American spelling) is a unit of measurement with dimension of reciprocal length, equivalent to one reciprocal metre, 1 dioptre = 1 m−1. It is normally used to express the optical power of a lens or curved mirror, which is a physical quantity equal to the reciprocal of the focal length, expressed in metres. For example, a 3-dioptre lens brings parallel rays of light to focus at 1⁄3 metre. A flat window has an optical power of zero dioptres, as it does not cause light to converge or diverge. Dioptres are also sometimes used for other reciprocals of distance, particularly radii of curvature and the vergence of optical beams. The main benefit of using optical power rather than focal length is that the thin lens formula has the object distance, image distance, and focal length all as reciprocals. Additionally, when relatively thin lenses are placed close together their powers approximately add. 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. Though the dioptre is based on the SI-metric system, it has not been included in the standard, so that there is no international name or symbol for this unit of measurement—within the international system of units, this unit for optical power would need to be specified explicitly as the inverse metre (m−1). However most languages have borrowed the original name and some national standardization bodies like DIN specify a unit name (dioptrie, dioptria, etc.) and unit symbol dpt. In vision care the symbol D is frequently used. The idea of numbering lenses based on the reciprocal of their focal length in metres was first suggested by Albrecht Nagel in 1866. The term dioptre was proposed by French ophthalmologist Ferdinand Monoyer in 1872, based on earlier use of the term dioptrice by Johannes Kepler.

ChatGPTRate this definition:0.0 / 0 votes

1. dioptre

   A dioptre is a unit of measurement for the optical power of a lens or a curved mirror, which is equal to the reciprocal of the focal length measured in metres. It is used in optometry and ophthalmology to measure the refractive power of corrective lenses or the eye. A higher dioptre value indicates a greater degree of light refraction and hence a higher prescription strength for eyeglasses or contact lenses.

Webster DictionaryRate this definition:5.0 / 1 vote

1. Dioptrenoun

   a unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter

2. Etymology: [F. See 2d Dioptric.]

WikidataRate this definition:1.0 / 1 vote

1. Dioptre

   A dioptre, or diopter, is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres. It is thus a unit of reciprocal length. For example, a 3-dioptre lens brings parallel rays of light to focus at ¹⁄3 metre. The same unit is also sometimes used for other reciprocals of distance, particularly radii of curvature and the vergence of optical beams. The usage was proposed by French ophthalmologist Ferdinand Monoyer in 1872, based on earlier use of the term dioptrice by Johannes Kepler. The main benefit of using optical power rather than focal length is that the lens-maker's equation has the object distance, image distance, and focal length all as reciprocals. A further benefit is that when relatively thin lenses are placed close together their powers approximately add. Thus, a thin 2-dioptre lens placed close to a thin 0.5-dioptre lens yields almost the same focal length as a 2.5-dioptre lens would have. Though the dioptre is based on the SI-metric system it has not been included in the standard so that there is no international name or abbreviation for this unit of measurement—within the international system of units this unit for optical power would need to be specified explicitly as the inverse metre. However most languages have borrowed the original name and some national standardization bodies like DIN specify a unit name and derived unit symbol "dpt".

Matched Categories

1. • Unit Of Measurement

Anagrams for DIOPTRE »

1. diopter

2. peridot

3. proetid

4. proteid

5. protide

How to pronounce DIOPTRE?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say DIOPTRE in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of DIOPTRE in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of DIOPTRE in Pythagorean Numerology is: 6

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=DIOPTRE
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Dioptre
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/DIOPTRE
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=DIOPTRE