{"id":863,"date":"2008-02-12T10:37:58","date_gmt":"2008-02-12T07:37:58","guid":{"rendered":"http:\/\/www.fyysika.ee\/wordpress\/?p=863"},"modified":"2010-03-29T09:43:30","modified_gmt":"2010-03-29T06:43:30","slug":"uudne-korduvkasutatav-3d-hologramm","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=863","title":{"rendered":"Uudne korduvkasutatav 3D hologramm"},"content":{"rendered":"<p><strong>&nbsp;Holograafiline ekraan, mis lubab 3D kujutiste kiiret salvestamist ja uuendamist avab uusi v&otilde;imalusi<\/strong>&nbsp;<\/p>\n<p>USA teadlased on v&auml;lja t&ouml;&ouml;tanud uudse ekraani, mis lubab holograafilisi kujutisi salvestada, kustutada ning siis uuesti salvestada k&otilde;igest m&otilde;ne minuti jooksul.&nbsp;Seade, mille m&otilde;&otilde;tmed on&nbsp;ca 10*10 cm&nbsp;ning mille tekitatud kujutist saab vaadelda ilma abivahenditeta t&ouml;&ouml;tab spetsiaalsetele valgustundlikel pol&uuml;meeridel&nbsp;ning suudab&nbsp;kujutist s&auml;ilitada mitu tundi.<\/p>\n<p>Tavalistes<\/p>\n<table cellspacing=\"5\" cellpadding=\"1\" width=\"200\" align=\"left\" summary=\"\" border=\"0\">\n<tbody>\n<tr>\n<td><em><img loading=\"lazy\" decoding=\"async\" height=\"182\" alt=\"\" width=\"259\" src=\"\/pildid\/Hologram.jpg\" \/><\/em><\/td>\n<\/tr>\n<tr>\n<td><em>Pildil on n&auml;ha inimese kolba, aju ja m&auml;nguauto hologrammid (Nature)<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>holograafilistes ekraanides&nbsp;salvestatud 3D pilti ei ole v&otilde;imalik uuendada ning see teeb &uuml;he pildi maksumuse v&auml;ga k&otilde;rgeks. Uus seade&nbsp;sai v&otilde;imalikuks t&auml;nu spetsiaalse, holograafia n&otilde;udmistele vastava&nbsp;fotorefraktiivse pol&uuml;meeri loomisele (kiire salvestamine, aeglane iseeneslik kustumine ja suured m&otilde;&otilde;tmed)&nbsp;ning salvestamise metoodika olulisele edasiarendusele.&nbsp;&nbsp;<\/p>\n<p>Fotorefraktiivsetest materjalidest tehtud filmis&nbsp;tekib holograafilise kujutise salvestamisel interferentsimustrile vastav laengute ruumiline jaotus, mis omakorda muudab&nbsp;filmi murdumisn&auml;itajat vastavalt sellele, kas tegemist on &quot;tumeda&quot; v&otilde;i &quot;heleda&quot; piirkonnaga.&nbsp;Aga kui filmi murdumisn&auml;itaja j&auml;lgib holografeerimisel tekkinud interferentsimustrit, siis sellise filmi valgustamisel laserivalgusega n&auml;emegi filmi taga soovitud 3D kujutist &#8211; hologrammi.<\/p>\n<p>Protsessis rakendatakse sellisele pol&uuml;meerile ka k&otilde;rgeid pingeid ning just nende pingete rakendamise metoodika on teine oluline edasiarendus selles t&ouml;&ouml;s. <\/p>\n<p>Enne veel, kui niisugust seadet hakatakse t&ouml;&ouml;stuslikult tootma tahavad teadlased luua fotorefraktiivse filmi m&otilde;&otilde;tmetega&nbsp;v&auml;hemalt 30*30 cm ning teha taastatava pildi v&auml;rviliseks. L&otilde;ppeesm&auml;rgiks oleks luua 3D televiisor pildi muutumise sagedusega 33 korda sekundis.<\/p>\n<p>Allikas: <em>Nature<\/em> <strong>451<\/strong> 694, optics.org<br \/>\nVahendas Kaido Reivelt<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;Holograafiline ekraan, mis lubab 3D kujutiste kiiret salvestamist ja uuendamist avab uusi v&otilde;imalusi&nbsp; USA teadlased on v&auml;lja t&ouml;&ouml;tanud uudse ekraani, mis lubab holograafilisi kujutisi salvestada, kustutada ning siis uuesti salvestada k&otilde;igest m&otilde;ne minuti jooksul.&nbsp;Seade, mille m&otilde;&otilde;tmed on&nbsp;ca 10*10 cm&nbsp;ning mille tekitatud kujutist saab vaadelda ilma abivahenditeta t&ouml;&ouml;tab spetsiaalsetele valgustundlikel pol&uuml;meeridel&nbsp;ning suudab&nbsp;kujutist s&auml;ilitada mitu tundi. Tavalistes [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[31,16],"tags":[],"class_list":{"0":"post-863","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rakenduslik-teadus","7":"category-teadusuudis","8":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=863"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/863\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}