Dioptri: Perbedaan antara revisi

'''Dioptri''' adalah satuan pengukuran kemampuan optikal dari sebuah [[lensa]], [[cermin]] cekung atau cermin cembung. Dioptri dirumuskan sebagai [[resiprokal]] [[jarak fokus]] yang diukur dalam satuan [[meter]] (yakni 1/meter). Sebagai contoh, lensa 3 dioptri memiliki panjang [[sinar]] paralel terhadap fokus {{frac|3}} meter. Istilah ini diusulkan oleh Ferdinand Monoyer dari [[PerancisPrancis]] tahun 1872.<ref>{{cite journal|last=Monoyer|first=F.|title=Sur l'introduction du système métrique dans le numérotage des verres de lunettes et sur le choix d'une unité de réfraction|journal=Annales d'Oculistiques|location=Paris|volume=68|page=101|year=1872}} The term had been coined by [[Johannes Kepler]] and was used for the title of his book ''[[Johannes Kepler#Dioptrice, the Somnium manuscript, and other work|Dioptrice]]'', in which he laid out some fundamental concepts on geometric optics.</ref><ref>{{cite web|title=Monoyer, Ferdinand|url=http://www.professeurs-medecine-nancy.fr/Monoyer_C.htm|work=La médecine à Nancy depuis 1872|accessdate=2011-04-26}}</ref><ref>{{cite web|last=Colenbrander|first=August|title=Measuring Vision and Vision Loss|url= http://www.ski.org/Colenbrander/Images/Measuring_Vis_Duane01.pdf|format=PDF|publisher=[[Smith-Kettlewell Institute]]|accessdate=2009-07-10|archive-date=2014-12-04|archive-url=https://web.archive.org/web/20141204193231/http://www.ski.org/Colenbrander/Images/Measuring_Vis_Duane01.pdf|dead-url=yes}}</ref>

* {{cite book|first= John E|last= Greivenkamp|year= 2004|title= Field Guide to Geometrical Optics|url= https://archive.org/details/fieldguidetogeom0000grei|publisher= [[SPIE#SPIE Press|SPIE]]|location= Bellingham, Wash|series= SPIE Field Guides vol. FG01|isbn= 978-0-8194-5294-8|oclc= 53896720}}

* {{cite book|first1= Eugene|last1= Hecht|first2= Zając|last2= Alfred|year= 1987|title= Optics|url= https://archive.org/details/optics0000hech|edition= 2nd|publisher= [[Addison–Wesley]]|location= Reading, Mass|isbn= 978-0-201-11609-0|oclc= 13761389}}