View source for Dioptrics

{{Short description|Science of light and lenses}}
{{ref improve|date=April 2021}}
'''Dioptrics''' is the branch of [[optics]] dealing with [[refraction]], especially by [[lens (optics)|lenses]]. In contrast, the branch dealing with [[mirror]]s is known as ''[[catoptrics]]''.<ref>{{Cite book|last=Schwartz|first=Steven H.|url=https://www.worldcat.org/oclc/1100899784|title=Geometrical and visual optics a clinical introduction|date=2019|isbn=978-1-260-12110-0|edition=Third|location=New York|oclc=1100899784 |pages=268}}</ref> [[Optical telescope|Telescopes]] that create their image with an [[Objective (optics)|objective]] that is a [[convex lens]] ([[Refracting telescope|refractors]]) are said to be "dioptric" telescopes. 

An early study of dioptrics was conducted by [[Ptolemy]] in relationship to the human eye as well as refraction in media such as water.  The understanding of the principles of dioptrics was further expanded by [[Alhazen]], considered the [[List of people known as the father or mother of something|father of modern optics]].

==See also==
* [[Diopter]]/[[Dioptre]] (unit of measurement)
* [[Dioptrice]] (work by Johannes Kepler)
* [[Catoptrics]] (study of and optical systems utilizing reflection)
* [[Catadioptrics]] (study of and optical systems utilizing reflection and refraction)
* [[Optical telescope]]
* [[List of telescope types]]
* [[Image-forming optical system]]

==References==
{{reflist}}

[[Category:Telescopes]]
[[Category:Optics]]

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