{"id":37385,"date":"2024-10-31T13:39:18","date_gmt":"2024-10-31T13:39:18","guid":{"rendered":"https:\/\/chineselens.com\/?p=37385"},"modified":"2024-10-31T13:59:19","modified_gmt":"2024-10-31T13:59:19","slug":"laser-beam-collimation","status":"publish","type":"post","link":"https:\/\/chineselens.com\/cs\/laser-beam-collimation\/","title":{"rendered":"Kolimace laserov\u00e9ho paprsku: Techniky a osv\u011bd\u010den\u00e9 postupy"},"content":{"rendered":"
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Zaveden\u00ed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Kolimace laserov\u00e9ho paprsku je z\u00e1kladn\u00edm aspektem mnoha analytick\u00fdch metod, kde se jako zdroj excitace \u010dasto pou\u017e\u00edv\u00e1 laser s kontinu\u00e1ln\u00ed vlnou (CW). Techniky jako fluorescence, Raman\u016fv rozptyl, absorpce a Rayleigh\u016fv rozptyl vyu\u017e\u00edvaj\u00ed lasery k p\u0159enosu energie na molekuly, \u010d\u00edm\u017e indukuj\u00ed excitaci nebo extrakci energie. Volba typu laseru je z\u00e1sadn\u00ed, proto\u017ee ovliv\u0148uje zaost\u0159itelnost a rovnom\u011brnost intenzity paprsku. Pro po\u017eadavky na vysok\u00e9 rozli\u0161en\u00ed a rovnom\u011brn\u00e9 osv\u011btlen\u00ed jsou nezbytn\u00e9 specifick\u00e9 typy CW laser\u016f.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Typy CW laser\u016f pro analytick\u00e9 aplikace\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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CW lasery se li\u0161\u00ed typem a strukturou a jsou p\u0159izp\u016fsobeny r\u016fzn\u00fdm aplikac\u00edm ve viditeln\u00e9m a bl\u00edzk\u00e9m infra\u010derven\u00e9m (NIR) spektru. Dominuj\u00ed dva prim\u00e1rn\u00ed typy: diodov\u00e9 lasery a DPSS (diode-Pumped Solid-State) lasery. Diodov\u00e9 lasery jsou kompaktn\u011bj\u0161\u00ed a ekonomi\u010dt\u011bj\u0161\u00ed, zat\u00edmco lasery DPSS \u010dasto poskytuj\u00ed vy\u0161\u0161\u00ed kvalitu paprsku. Ka\u017ed\u00fd typ lze konfigurovat v r\u016fzn\u00fdch modulech, jako je voln\u00e9 m\u00edsto, jednovidov\u00e9 vl\u00e1kno (SMF), v\u00edcevidov\u00e9 vl\u00e1kno (MMF) a vl\u00e1kno udr\u017euj\u00edc\u00ed polarizaci (PMF). N\u00ed\u017ee uveden\u00e1 tabulka porovn\u00e1v\u00e1 vlastnosti kolima\u010dn\u00edch technik pro diodov\u00e9 a DPSS lasery.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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CW laserov\u00e9 prostorov\u00e9 re\u017eimy\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Kontinu\u00e1ln\u00ed lasery pracuj\u00ed bu\u010f v jednom prostorov\u00e9m re\u017eimu (SM), nebo v v\u00edce prostorov\u00fdch re\u017eimech (MM), kter\u00e9 se tak\u00e9 ozna\u010duj\u00ed jako \u201etransverz\u00e1ln\u00ed\u201c nebo \u201epaprskov\u00e9 re\u017eimy\u201c. Tyto re\u017eimy ovliv\u0148uj\u00ed profil paprsku a jsou kl\u00ed\u010dov\u00e9 pro ur\u010den\u00ed zaost\u0159itelnosti a kvality paprsku. Lasery se \u010dasto vyb\u00edraj\u00ed na z\u00e1klad\u011b zam\u00fd\u0161len\u00e9 aplikace, proto\u017ee SM lasery obecn\u011b poskytuj\u00ed lep\u0161\u00ed kvalitu paprsku a zaost\u0159itelnost, zat\u00edmco MM lasery nab\u00edzej\u00ed vy\u0161\u0161\u00ed v\u00fdstupn\u00ed v\u00fdkon.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Metody kolimace laserov\u00e9ho paprsku\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Kolimace paprsku zahrnuje \u00fapravu v\u00fdstupu laseru tak, aby se minimalizovala divergence. To je zvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9 v mikroskopii a spektroskopii, kde divergence mus\u00ed b\u00fdt pod 2 mrad. Diodov\u00e9 lasery s kr\u00e1tkou dutinou nap\u0159\u00edklad produkuj\u00ed vysoce divergentn\u00ed paprsky, kter\u00e9 vy\u017eaduj\u00ed kolimaci. Nejp\u0159\u00edm\u011bj\u0161\u00ed p\u0159\u00edstup pou\u017e\u00edv\u00e1 jedinou asf\u00e9rickou \u010do\u010dku ke sn\u00ed\u017een\u00ed divergence; k dosa\u017een\u00ed v\u011bt\u0161\u00ed p\u0159esnosti a kontroly nad velikost\u00ed paprsku se v\u0161ak \u010dasto pou\u017e\u00edvaj\u00ed slo\u017eit\u011bj\u0161\u00ed konfigurace, jako jsou syst\u00e9my se dv\u011bma \u010do\u010dkami, zn\u00e1m\u00e9 tak\u00e9 jako teleskopy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Single Aspheric Lens Collimation\n<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Nejjednodu\u0161\u0161\u00ed metodou pro kolimaci laserov\u00e9ho paprsku je pou\u017eit\u00ed jedin\u00e9 asf\u00e9rick\u00e9 \u010do\u010dky. Ohniskov\u00e1 vzd\u00e1lenost \u010do\u010dky p\u0159\u00edmo ovliv\u0148uje pr\u016fm\u011br paprsku po kolimaci, p\u0159i\u010dem\u017e del\u0161\u00ed ohniskov\u00e9 vzd\u00e1lenosti produkuj\u00ed v\u011bt\u0161\u00ed pr\u016fm\u011bry paprsku. Tato metoda je \u0161iroce pou\u017e\u00edv\u00e1na kv\u016fli sv\u00e9 jednoduchosti, i kdy\u017e m\u016f\u017ee zp\u016fsobit aberace, pokud nen\u00ed spr\u00e1vn\u011b zarovn\u00e1na.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Syst\u00e9my se dv\u011bma \u010do\u010dkami\n\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Dvou\u010do\u010dkov\u00fd syst\u00e9m neboli dalekohled vyu\u017e\u00edv\u00e1 jednu negativn\u00ed a jednu pozitivn\u00ed \u010do\u010dku ke kolimaci a roz\u0161\u00ed\u0159en\u00ed nebo zmen\u0161en\u00ed paprsku. Toto nastaven\u00ed je up\u0159ednost\u0148ov\u00e1no v aplikac\u00edch vy\u017eaduj\u00edc\u00edch jemn\u00e9 ovl\u00e1d\u00e1n\u00ed polom\u011bru paprsku a je zvl\u00e1\u0161t\u011b u\u017eite\u010dn\u00e9 pro zlep\u0161en\u00ed kvality paprsku a sn\u00ed\u017een\u00ed astigmatismu v paprsc\u00edch diodov\u00e9ho laseru.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Kvalita a m\u011b\u0159en\u00ed paprsku<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Kvalita laserov\u00e9ho paprsku se \u010dasto hodnot\u00ed pomoc\u00ed faktoru kvality paprsku M\u00b2, kter\u00fd m\u011b\u0159\u00ed, jak bl\u00edzko se paprsek bl\u00ed\u017e\u00ed Gaussovu profilu. Hodnota M\u00b2 1 ozna\u010duje ide\u00e1ln\u00ed Gauss\u016fv paprsek, zat\u00edmco vy\u0161\u0161\u00ed hodnoty znamenaj\u00ed odchylky. Lasery DPSS s n\u00edzk\u00fdm v\u00fdkonem obvykle vykazuj\u00ed vysokou kvalitu paprsku s n\u00edzk\u00fdmi faktory M\u00b2, zat\u00edmco lasery DPSS s vysok\u00fdm v\u00fdkonem a diodov\u00e9 lasery maj\u00ed tendenci m\u00edt hor\u0161\u00ed kvalitu paprsku kv\u016fli tepeln\u00fdm vliv\u016fm.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Cirkularizace eliptick\u00fdch laserov\u00fdch paprsk\u016f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Diodov\u00e9 lasery obecn\u011b emituj\u00ed paprsky s eliptick\u00fdm pr\u016f\u0159ezem, co\u017e pro ur\u010dit\u00e9 aplikace vy\u017eaduje dal\u0161\u00ed kroky ke cirkulaci paprsku. Jeden p\u0159\u00edstup pou\u017e\u00edv\u00e1 dv\u011b ortogon\u00e1ln\u00ed cylindrick\u00e9 \u010do\u010dky k \u0159e\u0161en\u00ed divergence pod\u00e9l r\u016fzn\u00fdch os, co\u017e m\u00e1 za n\u00e1sledek kruhov\u011bj\u0161\u00ed profil paprsku. Dal\u0161\u00ed technika zahrnuje anamorfn\u00ed hranoly, kter\u00e9 upravuj\u00ed tvar paprsku rozta\u017een\u00edm nebo stla\u010den\u00edm jedn\u00e9 osy. Ka\u017ed\u00e1 metoda m\u00e1 sv\u00e9 p\u0159ednosti a omezen\u00ed, jak ukazuje tabulka.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Stabilita nasm\u011brov\u00e1n\u00ed a homogenita profilu paprsku<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Stabilita sm\u011brov\u00e1n\u00ed paprsku je nezbytn\u00e1 pro aplikace vy\u017eaduj\u00edc\u00ed vysokou p\u0159esnost. Faktory, jako jsou mechanick\u00e9 vibrace a tepeln\u00e1 rozta\u017enost sou\u010d\u00e1st\u00ed, mohou zp\u016fsobit kol\u00eds\u00e1n\u00ed paprsku. Pe\u010dliv\u00e9 vyrovn\u00e1n\u00ed optick\u00fdch prvk\u016f a regulace teploty zah\u0159\u00edvan\u00fdch sou\u010d\u00e1st\u00ed jsou kl\u00ed\u010dov\u00e9 pro minimalizaci nestability nasm\u011brov\u00e1n\u00ed.<\/p>

P\u0159esto\u017ee n\u011bkdy vykazuj\u00ed \u0161patn\u00fd profil paprsku v bl\u00edzk\u00e9m poli, diodov\u00e9 lasery mohou dos\u00e1hnout dobr\u00e9 zaost\u0159itelnosti na del\u0161\u00ed vzd\u00e1lenosti. P\u0159\u00edsn\u00fdm testov\u00e1n\u00edm bylo prok\u00e1z\u00e1no, \u017ee laserov\u00e9 paprsky se zlep\u0161uj\u00ed v homogenit\u011b a st\u00e1vaj\u00ed se v\u00edce kruhov\u00fdmi v bl\u00edzkosti ohniska, co\u017e podporuje jejich pou\u017eit\u00ed v aplikac\u00edch vy\u017eaduj\u00edc\u00edch vysokou zaost\u0159itelnost.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Z\u00e1v\u011bre\u010dn\u00e9 my\u0161lenky<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Techniky laserov\u00e9 kolimace se zna\u010dn\u011b li\u0161\u00ed v z\u00e1vislosti na typu laseru a po\u017eadavc\u00edch aplikace. Diodov\u00e9 lasery poskytuj\u00ed n\u00e1kladov\u011b efektivn\u00ed \u0159e\u0161en\u00ed pro mnoho pou\u017eit\u00ed, ale mohou vy\u017eadovat dal\u0161\u00ed komponenty pro optim\u00e1ln\u00ed kvalitu paprsku. Lasery DPSS, i kdy\u017e jsou dra\u017e\u0161\u00ed, nab\u00edzej\u00ed vynikaj\u00edc\u00ed kvalitu paprsku a zaost\u0159itelnost. Integrovan\u00e1 optika poskytuje \u0159adu mo\u017enost\u00ed kolimace s \u0159e\u0161en\u00edmi s vl\u00e1kny pro aplikace s vysokou popt\u00e1vkou. Nakonec by volba mezi diodov\u00fdmi a DPSS lasery m\u011bla vz\u00edt v \u00favahu faktory, jako je kvalita paprsku, zaost\u0159itelnost a rozpo\u010dtov\u00e1 omezen\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Kolimace laserov\u00e9ho paprsku je z\u00e1kladn\u00edm aspektem mnoha analytick\u00fdch metod, kde se jako zdroj buzen\u00ed \u010dasto pou\u017e\u00edv\u00e1 kontinu\u00e1ln\u00ed vlnov\u00fd (CW) laser.<\/p>","protected":false},"author":1,"featured_media":37401,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Laser Beam Collimation: Techniques and Best Practices","_seopress_titles_desc":"Laser beam collimation is a fundamental aspect in many analytical methods, where a continuous wave (CW) laser is often used as the excitation source.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[255,189],"tags":[253,254,242],"class_list":["post-37385","post","type-post","status-publish","format-standard","has-post-thumbnail","category-laser-industry","category-optical-components","tag-laser-beam","tag-laser-beam-collimator","tag-laser-collimating-lens"],"acf":[],"_links":{"self":[{"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/posts\/37385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/comments?post=37385"}],"version-history":[{"count":0,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/posts\/37385\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/media\/37401"}],"wp:attachment":[{"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/media?parent=37385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/categories?post=37385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chineselens.com\/cs\/wp-json\/wp\/v2\/tags?post=37385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}