{"id":7369,"date":"2015-12-26T03:34:14","date_gmt":"2015-12-26T01:34:14","guid":{"rendered":"http:\/\/www.ilkkimbuldu.com\/?p=7369"},"modified":"2017-01-01T02:25:07","modified_gmt":"2017-01-01T00:25:07","slug":"fotoseli-kim-buldu","status":"publish","type":"post","link":"https:\/\/www.ilkkimbuldu.com\/?p=7369","title":{"rendered":"Fotosel’i kim buldu"},"content":{"rendered":"

Fotosel’i icat eden ki\u015fi George R. Carey<\/strong>, 1851 y\u0131l\u0131nda d\u00fcnyaya gelen Amerikal\u0131 bir mucittir. Selenyum<\/a>‘un foto-elektrik \u00f6zelliklerini kullanarak, g\u00f6r\u00fcnt\u00fc aktar\u0131m\u0131 i\u00e7in bir ara\u00e7 olarak telefoskopu yapan ilk ki\u015filer aras\u0131ndad\u0131r – Modern televizyonun bir \u00f6nc\u00fcs\u00fc olmu\u015ftur.<\/p>\n

1873’de Willoughby Smith<\/strong>, selenyumun olu\u015fturdu\u011fu elektrik ak\u0131m\u0131<\/a> miktar\u0131n\u0131n \u00fczerine\u00a0vuran \u0131\u015f\u0131\u011f\u0131n miktar\u0131na ba\u011fl\u0131 oldu\u011funu ke\u015ffetti. (Baz\u0131 iletken malzemelerin bu \u00f6zelli\u011fi, foto iletkenlik olarak adland\u0131r\u0131l\u0131r.)
\nGeorge R. Carey bu ke\u015ffi \u00f6\u011frendi ve g\u00f6r\u00fcnt\u00fc aktar\u0131m\u0131 i\u00e7in temel bir sistem yapmak\u00a0i\u00e7in kulland\u0131. Bu temel g\u00f6r\u00fcnt\u00fc aktar\u0131m sistemi\u00a0televizyonun icad\u0131<\/a> i\u00e7in ilk\u00a0giri\u015fimlerden birisiydi.<\/p>\n

\u0130lk olarak, \u0131\u015f\u0131k, selenyum fotoselleri ve teller kullanarak\u00a0bir foto\u011fraf\u0131 ba\u015fka bir yere yans\u0131tmay\u0131 denedi. B\u00f6ylece foto\u011fraftan tek kare bir g\u00f6r\u00fcnt\u00fc olu\u015fturmay\u0131 ba\u015fard\u0131.<\/p>\n

\u0130kinci bulu\u015fu, birden \u00e7ok sinyali, g\u00f6rsel bir ekrana iletmek i\u00e7in geni\u015f bir fotosel ve tel dizisi kulland\u0131. Her ne kadar bu yakla\u015f\u0131m teoride \u00e7al\u0131\u015f\u0131lsa da, her bir piksel i\u00e7in kendine ait bir fotoseli ve kablolu devresi olmas\u0131 gerekti\u011fi sonucuna vard\u0131.\u00a0Bu da sistemi olduk\u00e7a b\u00fcy\u00fck yapmak manas\u0131na gerliyordu.<\/p>\n

Fotosel<\/b> (\u0130ngilizce: Photo Cell<\/i>) \u00fczerine d\u00fc\u015fen \u0131\u015f\u0131\u011f\u0131n \u015fiddetiyle orant\u0131l\u0131 olarak voltaj \u00fcreten \u0131\u015f\u0131k alg\u0131lay\u0131c\u0131s\u0131d\u0131r.\u00a0Fotoelektrik olay prensibiyle \u00e7al\u0131\u015f\u0131r.\u00a0Fotoseldeki cam k\u00fcrenin i\u00e7 k\u0131sm\u0131 sodyum,lityum gibi alkali metallerle kaplan\u0131r. \u00c7\u00fcnk\u00fc alkali metaller y\u00fcksek enerjili beyaz \u0131\u015f\u0131k al\u0131nca (g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131) elektronlar\u0131 kopar ve anot ucuna \u00e7ekilirler. Fotosel\u00a0g\u00fcne\u015f pili olarak kullan\u0131l\u0131r ve \u0131\u015f\u0131k enerjisiyle elektrikli aletleri do\u011frudan \u00e7al\u0131\u015ft\u0131r\u0131labilir. Di\u011fer metaller de i\u015fe yarar ancak alkali metallerdeki metalik \u00f6zellikleri g\u00f6steremez.<\/p>\n","protected":false},"excerpt":{"rendered":"

Fotosel’i icat eden ki\u015fi George R. Carey, 1851 y\u0131l\u0131nda d\u00fcnyaya gelen Amerikal\u0131 bir mucittir. Selenyum‘un foto-elektrik \u00f6zelliklerini kullanarak, g\u00f6r\u00fcnt\u00fc aktar\u0131m\u0131 i\u00e7in bir ara\u00e7 olarak telefoskopu yapan ilk ki\u015filer aras\u0131ndad\u0131r –…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2916,2191,655],"class_list":["post-7369","post","type-post","status-publish","format-standard","hentry","category-teknoloji","tag-fotosel","tag-selenyum","tag-televizyon"],"_links":{"self":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/7369"}],"collection":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7369"}],"version-history":[{"count":5,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/7369\/revisions"}],"predecessor-version":[{"id":7925,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/7369\/revisions\/7925"}],"wp:attachment":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}