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class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_no.wikipedia.org&uselang=nb" class=""><span>Doner</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Opprett_konto&returnto=Nattoptikk" title="Du oppfordres til å opprette en konto og logge inn, men det er ikke obligatorisk" class=""><span>Opprett konto</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Logg_inn&returnto=Nattoptikk" title="Du oppfordres til å logge inn, men det er ikke obligatorisk [o]" 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class="vector-toc-list"> </ul> </li> <li id="toc-Termisk_avbildning" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Termisk_avbildning"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Termisk avbildning</span> </div> </a> <ul id="toc-Termisk_avbildning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referanser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referanser"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Referanser</span> </div> </a> <ul id="toc-Referanser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_lenker" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_lenker"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Eksterne lenker</span> </div> </a> <ul id="toc-Eksterne_lenker-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul innholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul innholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Nattoptikk</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til en artikkel på et annet språk. Tilgjengelig på 30 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-30" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">30 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Bildf%C3%B6rst%C3%A4rkare" title="Bildförstärkare – svensk" lang="sv" hreflang="sv" data-title="Bildförstärkare" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D9%87%D8%A7%D8%B2_%D8%A7%D9%84%D8%B1%D8%A4%D9%8A%D8%A9_%D8%A7%D9%84%D9%84%D9%8A%D9%84%D9%8A%D8%A9" title="جهاز الرؤية الليلية – arabisk" lang="ar" hreflang="ar" data-title="جهاز الرؤية الليلية" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Gec%C9%99g%C3%B6rm%C9%99_cihaz%C4%B1" title="Gecəgörmə cihazı – aserbajdsjansk" lang="az" hreflang="az" data-title="Gecəgörmə cihazı" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B0%E0%A6%BE%E0%A6%A4%E0%A7%87%E0%A6%B0_%E0%A6%85%E0%A6%A8%E0%A7%8D%E0%A6%A7%E0%A6%95%E0%A6%BE%E0%A6%B0%E0%A7%87_%E0%A6%A6%E0%A7%87%E0%A6%96%E0%A6%BE%E0%A6%B0_%E0%A6%AF%E0%A6%A8%E0%A7%8D%E0%A6%A4%E0%A7%8D%E0%A6%B0" title="রাতের অন্ধকারে দেখার যন্ত্র – bengali" lang="bn" hreflang="bn" data-title="রাতের অন্ধকারে দেখার যন্ত্র" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Noktovizor" title="Noktovizor – tsjekkisk" lang="cs" hreflang="cs" data-title="Noktovizor" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Nachtsichtger%C3%A4t" title="Nachtsichtgerät – tysk" lang="de" hreflang="de" data-title="Nachtsichtgerät" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/%C3%96%C3%B6n%C3%A4gemisseade" title="Öönägemisseade – estisk" lang="et" hreflang="et" data-title="Öönägemisseade" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Night-vision_device" title="Night-vision device – engelsk" lang="en" hreflang="en" data-title="Night-vision device" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Instrumento_de_visi%C3%B3n_nocturna" title="Instrumento de visión nocturna – spansk" lang="es" hreflang="es" data-title="Instrumento de visión nocturna" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Noktovidilo" title="Noktovidilo – esperanto" lang="eo" hreflang="eo" data-title="Noktovidilo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AF%D9%88%D8%B1%D8%A8%DB%8C%D9%86_%D8%AF%DB%8C%D8%AF_%D8%AF%D8%B1_%D8%B4%D8%A8" title="دوربین دید در شب – persisk" lang="fa" hreflang="fa" data-title="دوربین دید در شب" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Jumelles_de_vision_nocturne" title="Jumelles de vision nocturne – fransk" lang="fr" hreflang="fr" data-title="Jumelles de vision nocturne" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%BC%EA%B0%84_%ED%88%AC%EC%8B%9C%EA%B2%BD" title="야간 투시경 – koreansk" lang="ko" hreflang="ko" data-title="야간 투시경" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%9E%D7%A6%D7%A2%D7%99_%D7%A8%D7%90%D7%99%D7%99%D7%AA_%D7%9C%D7%99%D7%9C%D7%94" title="אמצעי ראיית לילה – hebraisk" lang="he" hreflang="he" data-title="אמצעי ראיית לילה" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Naktinis_taikiklis" title="Naktinis taikiklis – litauisk" lang="lt" hreflang="lt" data-title="Naktinis taikiklis" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Nachtzichtapparatuur" title="Nachtzichtapparatuur – nederlandsk" lang="nl" hreflang="nl" data-title="Nachtzichtapparatuur" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%9A%97%E8%A6%96%E8%A3%85%E7%BD%AE" title="暗視装置 – japansk" lang="ja" hreflang="ja" data-title="暗視装置" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%B4%D8%A8_%D8%A8%D8%B5%D8%B1%DB%8C_%D8%B9%DB%8C%D9%86%DA%A9" title="شب بصری عینک – vestpunjabi" lang="pnb" hreflang="pnb" data-title="شب بصری عینک" data-language-autonym="پنجابی" data-language-local-name="vestpunjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%B4%D9%BE%DB%90_%D9%84%D9%8A%D8%AF_%D8%B3%D8%AA%D8%B1%DA%AF%DB%8D" title="شپې ليد سترگۍ – pashto" lang="ps" hreflang="ps" data-title="شپې ليد سترگۍ" data-language-autonym="پښتو" data-language-local-name="pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Noktowizor" title="Noktowizor – polsk" lang="pl" hreflang="pl" data-title="Noktowizor" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B1%D0%BE%D1%80_%D0%BD%D0%BE%D1%87%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B2%D0%B8%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F" title="Прибор ночного видения – russisk" lang="ru" hreflang="ru" data-title="Прибор ночного видения" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sat mw-list-item"><a href="https://sat.wikipedia.org/wiki/%E1%B1%B1%E1%B1%9F%E1%B1%AD%E1%B1%A4%E1%B1%B4_%E1%B1%B5%E1%B1%B7%E1%B1%A4%E1%B1%A5%E1%B1%9A%E1%B1%B1_%E1%B1%B0%E1%B1%A4%E1%B1%B5%E1%B1%B7%E1%B1%9F%E1%B1%AD%E1%B1%A4%E1%B1%A5" title="ᱱᱟᱭᱤᱴ ᱵᱷᱤᱥᱚᱱ ᱰᱤᱵᱷᱟᱭᱤᱥ – santali" lang="sat" hreflang="sat" data-title="ᱱᱟᱭᱤᱴ ᱵᱷᱤᱥᱚᱱ ᱰᱤᱵᱷᱟᱭᱤᱥ" data-language-autonym="ᱥᱟᱱᱛᱟᱲᱤ" data-language-local-name="santali" class="interlanguage-link-target"><span>ᱥᱟᱱᱛᱟᱲᱤ</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Pajisja_p%C3%ABr_shikim_nat%C3%ABn" title="Pajisja për shikim natën – albansk" lang="sq" hreflang="sq" data-title="Pajisja për shikim natën" data-language-autonym="Shqip" data-language-local-name="albansk" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Naprava_za_no%C4%8Dno_gledanje" title="Naprava za nočno gledanje – slovensk" lang="sl" hreflang="sl" data-title="Naprava za nočno gledanje" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Optiset_pime%C3%A4n%C3%A4k%C3%B6kiikarit" title="Optiset pimeänäkökiikarit – finsk" lang="fi" hreflang="fi" data-title="Optiset pimeänäkökiikarit" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Gece_g%C3%B6r%C3%BC%C5%9F_arac%C4%B1" title="Gece görüş aracı – tyrkisk" lang="tr" hreflang="tr" data-title="Gece görüş aracı" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%BB%D0%B0%D0%B4_%D0%BD%D1%96%D1%87%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B1%D0%B0%D1%87%D0%B5%D0%BD%D0%BD%D1%8F" title="Прилад нічного бачення – ukrainsk" lang="uk" hreflang="uk" data-title="Прилад нічного бачення" data-language-autonym="Українська" data-language-local-name="ukrainsk" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%B4%D8%A8_%D8%A8%D8%B5%D8%B1%DB%8C_%D8%B9%DB%8C%D9%86%DA%A9" title="شب بصری عینک – urdu" lang="ur" hreflang="ur" data-title="شب بصری عینک" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Thi%E1%BA%BFt_b%E1%BB%8B_nh%C3%ACn_%C4%91%C3%AAm" title="Thiết bị nhìn đêm – vietnamesisk" lang="vi" hreflang="vi" data-title="Thiết bị nhìn đêm" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%A4%9C%E8%A6%96%E9%8F%A1" title="夜視鏡 – kinesisk" lang="zh" hreflang="zh" data-title="夜視鏡" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q328989#sitelinks-wikipedia" title="Rediger lenker til artikkelen på andre språk" class="wbc-editpage">Rediger lenker</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Navnerom"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Nattoptikk" title="Vis innholdssiden [c]" accesskey="c"><span>Artikkel</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Diskusjon:Nattoptikk" rel="discussion" title="Diskusjon om innholdssiden [t]" accesskey="t"><span>Diskusjon</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Bytt språkvariant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">norsk bokmål</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Visninger"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Nattoptikk"><span>Les</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nattoptikk&veaction=edit" title="Rediger siden [v]" accesskey="v"><span>Rediger</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nattoptikk&action=edit" title="Rediger kildekoden for denne siden [e]" accesskey="e"><span>Rediger kilde</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Nattoptikk&action=history" title="Tidligere sideversjoner av denne siden [h]" accesskey="h"><span>Vis historikk</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Sideverktøy"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Verktøy" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Verktøy</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Verktøy</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">skjul</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Flere alternativer" > <div class="vector-menu-heading"> Handlinger </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" 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Disse fordeles i to hovedkategorier av teknologi: Bildeforbedring og termisk avbildning.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Bildeforbedring forsterker eksisterende lys (visuelt og nær-<a href="/wiki/Infrar%C3%B8d_str%C3%A5ling" title="Infrarød stråling">infrarødt lys</a>) mens termisk avbildning bruker forskjell i varmesignatur (termisk IR-stråling) for å generere et bilde. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Bildeforbedring">Bildeforbedring</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nattoptikk&veaction=edit&section=1" title="Rediger avsnitt: Bildeforbedring" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nattoptikk&action=edit&section=1" title="Rediger kildekoden til seksjonen Bildeforbedring"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Fil:Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg/250px-Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg" decoding="async" width="250" height="166" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg/375px-Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/db/Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg/500px-Special_tactics_operatorfrom_the_24th_Special_Operations_Wing.jpg 2x" data-file-width="6048" data-file-height="4024" /></a><figcaption>Night Vision Goggles, (NVG) forsterker eksisterende lys</figcaption></figure> <p>Bildeforbedringoptikk forsterker eksisterende lys som befinner seg i det nær-infrarøde (typisk lys fra verdensrommet) og visuelle spektret. </p><p>Lys forsterkes på følgende måte: </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Iron_Knights_at_Night_150124-A-AG877-391.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Iron_Knights_at_Night_150124-A-AG877-391.jpg/250px-Iron_Knights_at_Night_150124-A-AG877-391.jpg" decoding="async" width="250" height="166" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Iron_Knights_at_Night_150124-A-AG877-391.jpg/375px-Iron_Knights_at_Night_150124-A-AG877-391.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Iron_Knights_at_Night_150124-A-AG877-391.jpg/500px-Iron_Knights_at_Night_150124-A-AG877-391.jpg 2x" data-file-width="6016" data-file-height="4000" /></a><figcaption>Landskap sett igjennom NVG</figcaption></figure> <ol><li><a href="/wiki/Foton" title="Foton">Fotoner</a> i nevnte spekter entrer nattbrillenes linse.</li> <li>Fotonene går videre inn i et bildeforsterker-rør <i>(image-intensifier tube)</i> som inneholder en <a href="/wiki/Fotomultiplikator" title="Fotomultiplikator">fotokatode</a>. Fotokatoden frigir <a href="/wiki/Elektron" title="Elektron">elektroner</a> når den treffes av fotoner.</li> <li>Etter som elektronene reiser fra katoden, treffer de en strømsatt plate (<i>microchannel plate, MCP</i>). Dette er en liten skive av glass med millioner av mikroskopiske hull/mikrokanaler i seg. MCP befinner seg i et vakuum og har elektroder på hver side av platen. Hver mikrokanal er ca 45 ganger så lang som den er vid, og fungerer som en <a href="/wiki/Elektronmultiplikator" title="Elektronmultiplikator">elektronmultiplikator</a> som øker antall elektroner tusenvis av ganger. Etter som elektronene treffer veggene på tur gjennom en mikrokanal blir antallet elektroner mangedoblet. I enden av MCP treffer disse elektronene en fosforskjerm. Fosforet emitterer lys (fotoner) når elektronene treffer, og et «lysforsterket» bilde blir presentert for brukeren.</li></ol> <div class="mw-heading mw-heading2"><h2 id="Termisk_avbildning">Termisk avbildning</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nattoptikk&veaction=edit&section=2" title="Rediger avsnitt: Termisk avbildning" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nattoptikk&action=edit&section=2" title="Rediger kildekoden til seksjonen Termisk avbildning"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Thermal_imaging_of_a_rat.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Thermal_imaging_of_a_rat.jpg/250px-Thermal_imaging_of_a_rat.jpg" decoding="async" width="250" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Thermal_imaging_of_a_rat.jpg/375px-Thermal_imaging_of_a_rat.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/64/Thermal_imaging_of_a_rat.jpg/500px-Thermal_imaging_of_a_rat.jpg 2x" data-file-width="1080" data-file-height="487" /></a><figcaption>En rotte gjennom termisk avbildning</figcaption></figure> <p>Termisk avbildning benytter forskjell i varmesignatur i det som observeres for å generere et bilde. Til forskjell fra bildeforbedring-/lysforsterker-optikk, som benytter seg av lyset som blir reflektert i omgivelsene, benytter termisk avbildning energi i form av infrarød stråling som blir emittert av objekter i omgivelsene. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Thermal_Skylarks.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Thermal_Skylarks.png/250px-Thermal_Skylarks.png" decoding="async" width="250" height="189" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Thermal_Skylarks.png/375px-Thermal_Skylarks.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Thermal_Skylarks.png/500px-Thermal_Skylarks.png 2x" data-file-width="854" data-file-height="645" /></a><figcaption>Sanglerker observert på lang avstand gjennom termisk avbildning</figcaption></figure> <ol><li>Strålingen i område som observeres treffer linsen og blir etter dette skannet av elektronisk styrte IR detektorer som har tusenvis av observasjonpunkt.</li> <li>Detektorene skaper et detaljert temperaturmønster kalt et termogram.</li> <li>Termogrammet blir omgjort til elektriske impulser som sendes til en dataenhet, bestående av signal-behandlingsenhet og kretskort, som omgjør informasjonen til digital data.</li> <li>Data blir sendt til og presentert på en skjerm, som presenterer det observerte i form av forskjellige farger som samsvarer med temperaturforskjellen på det som observeres.</li></ol> <p>Det finnes to hovedtyper teknologi for termisk avbildning: Ikke-avkjølte og avkjølte </p><p>Ikke-avkjølt optikk er den mest utbredte, billigste, men mist nøyaktige. Avkjølte enheter er mye mer kostbare, men også ekstremt nøyaktige. </p><p>Termisk avbildning brukes brukes blant annet av forsvar, politi, redningstjenester, jegere eller ofte som et verktøy i undersøkelse av bygninger for å avdekke kuldebroer, i elektriske anlegg for å oppdage varmgang eller på andre områder der temperaturforskjeller kan gi en indikasjon på problemer. </p> <div class="mw-heading mw-heading2"><h2 id="Referanser">Referanser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nattoptikk&veaction=edit&section=3" title="Rediger avsnitt: Referanser" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nattoptikk&action=edit&section=3" title="Rediger kildekoden til seksjonen Referanser"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><b><a href="#cite_ref-1">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://electronics.howstuffworks.com/gadgets/high-tech-gadgets/nightvision.htm">«How Night Vision Works»</a>. <i>HowStuffWorks</i> (på engelsk). 27. april 2001<span class="reference-accessdate">. Besøkt 9. september 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fno.wikipedia.org%3ANattoptikk&rft.atitle=How+Night+Vision+Works&rft.date=2001-04-27&rft.genre=unknown&rft.jtitle=HowStuffWorks&rft_id=https%3A%2F%2Felectronics.howstuffworks.com%2Fgadgets%2Fhigh-tech-gadgets%2Fnightvision.htm&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal" class="Z3988"><span style="display:none;"> </span></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Eksterne_lenker">Eksterne lenker</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nattoptikk&veaction=edit&section=4" title="Rediger avsnitt: Eksterne lenker" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Nattoptikk&action=edit&section=4" title="Rediger kildekoden til seksjonen Eksterne lenker"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="bjeller languageicon" style="color: var(--color-subtle, #54595d);cursor:help;" title="engelsk">(en)</span> <a href="https://commons.wikimedia.org/wiki/Category:Night_vision_devices" class="extiw" title="commons:Category:Night vision devices">Night vision devices</a> – kategori av bilder, video eller lyd på <a href="/wiki/Wikimedia_Commons" title="Wikimedia Commons">Commons</a> <span class="noprint plainlinks wikidata-linkback wd_p373"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q328989?uselang=nb#P373" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" 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