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[[Berkas:BiconvexLens.jpg|jmpl|180px|
'''Lensa''' atau
Lensa paling awal tercatat di [[Yunani Kuno]], dengan sandiwara [[Aristophanes]] [[The Clouds]] ([[424 SM]]) menyebutkan sebuah [[gelas-pembakar|kaca-pembakar]] (sebuah [[lensa cembung]] digunakan untuk memfokuskan cahaya matahari untuk menciptakan api).
Tulisan [[Pliny the Elder]] ([[23]]-[[79]]) juga menunjukan bahwa gelas-pembakar juga dikenal [[Kekaisaran Roma]], dan disebut juga apa yang kemungkinan adalah sebuah penggunaan pertama dari [[lensa pembetul]]: [[Nero]] juga diketahui menonton [[gladiator]] melalui sebuah [[
[[Seneca the Younger]] ([[3 SM]] - [[65]]) menjelaskan efek pembesaran dari sebuah gelas bulat yang diisi oleh [[air]]. Matematikawan [[muslim]] berkebangsaan [[Bangsa Arab|Arab]] [[Alhazen|Alhazen (Abu Ali al-Hasan Ibn Al-Haitham)]], ([[965]]-[[1038]]) menulis teori optikal pertama dan utama yang menjelaskan bahwa [[lensa mata|lensa]] di [[mata]] manusia membentuk sebuah gambar di [[retina]]. Penyebaran penggunaan lensa tidak terjadi sampai penemuan [[kacamata]], mungkin di [[Italia]] pada [[1280-an]].
== Konstruksi ==
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* {{cite book|first=Eugene|last=Hecht|year=1987|title=Optics|url=https://archive.org/details/optics0000hech|edition=2nd|publisher=Addison Wesley|isbn=0-201-11609-X}} Chapters 5 & 6.
* {{cite book|first=Eugene|last=Hecht|year=2002|title=Optics|edition=4th|publisher=Addison Wesley|isbn=0-321-18878-0}}
* {{cite book|first=John E.|last=Greivenkamp|year=2004|title=Field Guide to Geometrical Optics|url=https://archive.org/details/fieldguidetogeom0000grei|publisher=SPIE|others=SPIE Field Guides vol. '''FG01'''|isbn=0-8194-5294-7 }}
*https://bangid000.blogspot.com/2020/03/teori-fisika-dalam-anime-dr.html?m=1 Teori fisika di Dr Stone.
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* {{cite web|url=http://www.terrypepper.com/lights/index.htm |author=Pepper, Terry|title=''Seeing the Light: Lighthouses on the western Great Lakes''}}
* [http://www-personal.umich.edu/~bclee/lens.html Random Destructive Acts via Focused Solar Radiation.]
* [http://www.truckview.net TruckView Fresnel lens combats the HGV Blind-Spot.] {{Webarchive|url=https://web.archive.org/web/20190408105246/http://www.truckview.net/ |date=2019-04-08 }}
* [http://vega.org.uk/video/programme/226 How the Fresnel lens works.]
* [http://www.digitalartform.com/archives/2009/04/fresnel_lens_-.html A computer analysis of the Fresnel lens cross section depicted in the 'graphic examples' section of this very Wikipedia article.] {{Webarchive|url=https://web.archive.org/web/20090520054046/http://www.digitalartform.com/archives/2009/04/fresnel_lens_-.html |date=2009-05-20 }}
Baris 175:
* [http://books.google.com/books?id=KdYclkhSfTAC&pg=PT49&lpg=PT49&dq=optical+glass+ingredients&source=web&ots=sLEkmvi05g&sig=F6ERFbklTewIvFuKh30POTb0JG0&hl=en&sa=X&oi=book_result&resnum=7&ct=result Optical glass construction]
* [http://www.bbc.co.uk/radio4/history/inourtime/inourtime_20070301.shtml History of Optics (audio mp3)] {{Webarchive|url=https://web.archive.org/web/20090106072032/http://www.bbc.co.uk/radio4/history/inourtime/inourtime_20070301.shtml |date=2009-01-06 }} by Simon Schaffer, Professor in History and Philosophy of Science at the [[University of Cambridge]], Jim Bennett, Director of the Museum of the History of Science at the [[University of Oxford]] and Emily Winterburn, Curator of Astronomy at the [[National Maritime Museum]] (recorded by the [[BBC]]).
* [http://www.lightandmatter.com/html_books/5op/ch04/ch04.html a chapter from an online textbook on refraction and lenses] {{Webarchive|url=https://web.archive.org/web/20091217113846/http://www.lightandmatter.com/html_books/5op/ch04/ch04.html |date=2009-12-17 }}
* [http://www.physnet.org/modules/pdfmodules/m223.pdf ''Thin Spherical Lenses ''] on [http://www.physnet.org Project PHYSNET].
* [http://www.digitalartform.com/lenses.htm Lens article at ''digitalartform.com''] {{Webarchive|url=https://web.archive.org/web/20160304054022/http://www.digitalartform.com/lenses.htm |date=2016-03-04 }}
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