Lensa: Perbedaan antara revisi

Konten dihapus Konten ditambahkan
Tag: Suntingan perangkat seluler Suntingan peramban seluler
InternetArchiveBot (bicara | kontrib)
Rescuing 7 sources and tagging 2 as dead.) #IABot (v2.0.8
Baris 81:
 
=== [[Lensa aksikon]] ===
'''Lensa aksikon''' ([[bahasa Inggris|en]]: '''''axicon lens''''') adalah lensa dengan bidang antarmuka berbentuk kerucut. Lensa aksikon akan memproyeksikan sebuah titik menjadi garis sepanjang sumbu optis, dan mengubah sinar [[laser]] menjadi bentuk cincin.<ref>{{cite web| url=http://www.optics.arizona.edu/OPTI696/2005/axicon_Proteep.pdf| author=Proteep Mallik| title=The Axicon| year=2005| accessdate=2007-11-22| archive-date=2009-11-23| archive-url=https://web.archive.org/web/20091123101108/http://www.optics.arizona.edu/OPTI696/2005/axicon_Proteep.pdf| dead-url=yes}}</ref> Lensa ini dapat dipergunakan untuk mengubah [[sorot Gauss]] menjadi seperti [[sorot Bessel]] dengan efek [[difraksi]] yang sangat kecil.<ref>{{cite web| url=http://www.st-andrews.ac.uk/%7Eatomtrap/papers/Nature.pdf| author=Kishan Dholakia| coauthors= David McGloin, and Vene Garcés-Chávez| title=Optical micromanipulating using a self-reconstructing light beam| year=2002| accessdate=2007-11-22| archive-date=2004-12-04| archive-url=https://web.archive.org/web/20041204141219/http://www.st-andrews.ac.uk/~atomtrap/papers/Nature.pdf| dead-url=yes}}</ref><ref>{{cite journal|author=V. Garcés-Chávez| coauthors= D. McGloin, H. Melville, W. Sibbett and K. Dholakia| title=Simultaneous micromanipulation in multiple planes using a self-reconstructing light beam| journal=Nature| volume= 419| year=2002| url=http://sinclair.ece.uci.edu/Papers/Optics/Orbital%20angular%20momentum/Garces-Chavez%20Nature%20419%20pp145-148%202002%20(Simultaneous%20micromanipulation%20in%20multiple%20planes%20using%20a%20self-reconstructing%20light%20beam).pdf| accessdate=2007-02-06| doi=10.1038/nature01007| pages=145}}</ref>
 
=== [[Lensa Fresnel]] ===
'''Lensa Fresnel''' adalah sebuah lensa yang dikembangkan oleh seorang fisikawan berkebangsaan Prancis, [[Augustin Jean Fresnel]] untuk aplikasi pada [[mercusuar]]. Konstruksi lensa didesain dengan panjang fokus yang pendek, jarak fokus tak terhingga dan tebal lensa yang sangat tipis jika dibandingkan dengan lensa konvensional, agar dapat melewatkan lebih banyak [[cahaya]] sehingga lampu mercusuar dapat terlihat dari jarak yang lebih jauh.
 
Menurut majalah Smithsonian, lensa Fresnel yang pertama digunakan pada tahun 1823 pada [[mercusuar Cordouan]] di tanjung [[muara Gironde]], sinar cahaya yang dipancarkan mampu terlihat dari jarak 20 mil (32&nbsp;km).<ref>Watson, Bruce. [http://libproxy.uncg.edu:2088/servlet/BioRC "Science Makes a Better Lighthouse Lens."]{{Pranala mati|date=Februari 2021 |bot=InternetArchiveBot |fix-attempted=yes }} ''Smithsonian''. August 1999 v30 i5 p30. produced in ''Biography Resource Center''. Farmington Hills, Mich.: Thomson Gale. 2005.</ref> Seorang fisikawan [[Skotlandia]], [[Sir David Brewster]], memperkenalkan lensa ini untuk digunakan pada seluruh mercusuar di daratan [[Inggris]].<ref>[http://search.eb.com/eb/article-9016395 "Brewster, Sir David."] ''Encyclopædia Britannica''. 2005. Encyclopædia Britannica Online. 11 November 2005.</ref><ref>[http://libproxy.uncg.edu:2088/servlet/BioRC "David Brewster."]{{Pranala mati|date=Februari 2021 |bot=InternetArchiveBot |fix-attempted=yes }} ''World of Invention'', 2nd ed. Gale Group, 1999. Reproduced in ''Biography Resource Center''. Farmington Hills, Mich.: Thomson Gale. 2005.</ref>
 
Sebelum lensa Fresnel ditemukan, ide untuk membuat lensa yang lebih tipis dan ringan yang tersusun dari beberapa bagian terpisah dalam sebuah bingkai, sering disebut sebagai ide dari [[Georges Louis Leclerc]] dan [[Comte de Buffon]].<ref>[http://search.eb.com/eb/article-9035385 "Fresnel lens."] ''Encyclopædia Britannica''. 2005. Encyclopædia Britannica Online. 11 November 2005.</ref> [[Augustin Jean Fresnel|Fresnel]] menyempurnakan penyusunan lensa-lensa konsentrik tersebut berdasarkan perhitungan [[zona Fresnel]].
Baris 161:
== Pranala luar ==
{{Commons|Lens}}
* [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 }}
* [http://www.phy.ntnu.edu.tw/java/Lens/lens_e.html Thin Lens Java applet]
* [http://home.comcast.net/~hebsed/enoch.htm Article on Ancient Egyptian lenses]
Baris 169:
* [http://www.truckview.net TruckView Fresnel lens combats the HGV Blind-Spot.]
* [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 }}
* [http://books.google.com/books?id=cuzYl4hx-B8C&pg=PA58&lpg=PA58&dq=Fused+quartz+nikon++camera+lens&source=web&ots=n-IqvTABOz&sig=t-YYBNAIsgKQ37D9kTA0CcK6f1k&hl=en&sa=X&oi=book_result&resnum=8&ct=result#PPA100,M1 Applied photographic optics Book]
* [http://books.google.com/books?id=J0RX1mbhzAEC&printsec=toc&dq=bk7+optical+glass+construction&source=gbs_summary_s&cad=0#PRA1-PA58,M1 Book- The properties of optical glass]
Baris 177:
* [http://www.lightandmatter.com/html_books/5op/ch04/ch04.html a chapter from an online textbook on refraction and lenses]
* [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 }}
* [http://home.comcast.net/~hebsed/enoch.htm Article on Ancient Egyptian lenses]
* [http://www3.usal.es/%7Ehistologia/aplicacion/english/museum/microsco/micros01/micros01.htm picture of the Ninive rock crystal lens] {{Webarchive|url=https://web.archive.org/web/20070516051709/http://www3.usal.es/%7Ehistologia/aplicacion/english/museum/microsco/micros01/micros01.htm |date=2007-05-16 }}
* [http://luminous-landscape.com/tutorials/resolution.shtml Do Sensors “Outresolve” Lenses?] {{Webarchive|url=https://web.archive.org/web/20100102070908/http://luminous-landscape.com/tutorials/resolution.shtml |date=2010-01-02 }}; on lens and sensor resolution interaction.
 
== Simulasi ==