{"id":69178,"date":"2022-02-21T13:04:57","date_gmt":"2022-02-21T05:04:57","guid":{"rendered":"https:\/\/qvarz.com\/modh-calabru-ard-beachtais-le-haghaidh-speictrimeadar\/"},"modified":"2022-02-21T13:05:59","modified_gmt":"2022-02-21T05:05:59","slug":"modh-calabru-ard-beachtais-le-haghaidh-speictrimeadar","status":"publish","type":"post","link":"https:\/\/qvarz.com\/ga\/modh-calabru-ard-beachtais-le-haghaidh-speictrimeadar\/","title":{"rendered":"Modh Calabr\u00fa Ard-Beachtais le haghaidh Speictrim\u00e9adar"},"content":{"rendered":"\n

T\u00e1 cruinneas calabraithe speictrim\u00e9adar r\u00edth\u00e1bhachtach do go leor teicn\u00edc\u00ed tr\u00e9ithrithe opt\u00fala mar speictreasc\u00f3pacht Raman agus trasnamh\u00e9adracht. 1\u20133<\/sup> Go hiond\u00fail, \u00fas\u00e1idtear lampa calabraithe le haghaidh calabr\u00fa speictrim\u00e9adar. Sol\u00e1thra\u00edonn lampa\u00ed calabr\u00fach\u00e1in l\u00ednte saini\u00fala, dea-shainithe ag tonnfhad aitheanta, agus sanntar iad seo d’inn\u00e9acsanna picteil\u00edn\u00ed an bhrathad\u00f3ra. I gc\u00e1s raonta speictreach beaga, \u00e1fach, nuair nach bhfuil ach l\u00edon beag l\u00ednte calabraithe ar f\u00e1il, \u00e9ir\u00edonn an calabr\u00fa m\u00edchruinn. D\u00e9anann an t-alt seo cur s\u00edos ar phrionsabail modh calabr\u00fach\u00e1in ardchruinneas a \u00fas\u00e1ideann strucht\u00far ilchiseal Fabry-Perot, ag sol\u00e1thar buaiceanna calabraithe g\u00e9ar iolracha thar an raon speictrim\u00e9adar ioml\u00e1n.<\/p>\n\n

Modhanna calabraithe<\/h2>\n\n

I bhformh\u00f3r na gc\u00e1sanna, d\u00e9antar speictrim\u00e9adar a chalabr\u00fa ag baint \u00fas\u00e1ide as lampa\u00ed calabr\u00fach\u00e1in traidisi\u00fanta. C\u00e9 go bhfuil an modh seo simpl\u00ed le h\u00fas\u00e1id, t\u00e1 roinnt srianta aige; t\u00e1 cur s\u00edos orthu seo th\u00edos.<\/p>\n\n

Lampa\u00ed calabr\u00fach\u00e1in traidisi\u00fanta<\/h3>\n\n

Soils\u00edonn lampa calabraithe an speictrim\u00e9adar, agus d\u00e9antar su\u00edomhanna \u2013 ie, inn\u00e9acsanna picteil\u00edn ( p<\/em> ) de na l\u00ednte calabraithe de thonnfhaid aitheanta (\u03bb) – a thomhas. Tugann feisteas cearnach n\u00f3 ardoird-il-ilt\u00e9armach do na sonra\u00ed (tonnfhad [\u03bb] ag su\u00edomhanna [ p<\/em> ]) an fheidhm chalabr\u00fach\u00e1in at\u00e1 \u00e1 lorg \u2013 \u03bb( p<\/em> ). Sol\u00e1thra\u00edonn lampa\u00ed calabr\u00fach\u00e1in (m.sh., lampa\u00ed Hg\/Ar) l\u00ednte astaithe ag tonnfhad tugtha. Mar riail, t\u00e1 r\u00e9igi\u00fain tonnfhad leathan gan aon beanna, rud a fh\u00e1gann go bhfuil cruinneas calabraithe teoranta. Ina theannta sin, t\u00e1 oiri\u00fanach de ch\u00e9im ard-ilt\u00e9armach (N> 3) \u00e9il\u00edonn s\u00e9 l\u00edon \u00e1irithe l\u00ednte calabraithe, a d’fh\u00e9adfadh a bheith teoranta i, m.sh., speictrim\u00e9adar le raonta beaga speictreach. N\u00edl an modh traidisi\u00fanta chomh hiontaofa, go h\u00e1irithe i gc\u00e1s mionspeictrim\u00e9adar, a l\u00e9ir\u00edonn scaipthe solais neamhl\u00edneach go l\u00e1idir. R\u00e9it\u00edonn an modh calabraithe a bhfuil cur s\u00edos air anseo an fhadhb seo tr\u00ed \u00fas\u00e1id a bhaint as eilimint opt\u00fail bhreise a ghineann sraith l\u00ednte tagartha at\u00e1 scaipthe go cothrom d\u2019aon raon ar leith.<\/p>\n\n

Scagaire tagartha Fabry-Perot<\/strong><\/p>\n\n

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F\u00edor 1 – Socr\u00fa do thurgnaimh trasnamh\u00e9adair: 1) Calabr\u00fa garbh le lampa mearcair. 2) Calabr\u00fa le FRF. (Figi\u00fair\u00ed a at\u00e1irgeadh le cead \u00f3 Thag. 4.)<\/em><\/figcaption><\/figure><\/div>\n\n\n\n
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Is \u00ed an phr\u00edomheilimint a \u00fas\u00e1idtear n\u00e1 scagaire tagartha Fabry-Perot (FRF), a dh\u00e9antar de ghn\u00e1th de chiseal spacer tr\u00e9dhearcach a chr\u00edochna\u00edonn dh\u00e1 sc\u00e1th\u00e1n ardfhrithchaiteacha ( F\u00edor 1<\/em> ). Crutha\u00edonn soilsi\u00fa leathanbhanda le solas b\u00e1n uasmh\u00e9ideanna tarchurtha g\u00e9ara iolracha de dh\u00e9ine comhchos\u00fail a dh\u00e1ileadh thar an raon speictrim\u00e9adar ioml\u00e1n. Is \u00e9ard a bh\u00ed san FRF a \u00fas\u00e1ideadh i dturgnaimh na n-\u00fadar n\u00e1 dh\u00e1 bhileog mica droma-airgid i dteagmh\u00e1il dh\u00edreach lena ch\u00e9ile. Baineadh \u00fas\u00e1id as Mica, arb \u00e9 an t-\u00e1bhar ciseal spacer \u00e9, mar gheall ar a air\u00edonna scoilteachta den scoth agus ar a chumas bileoga m\u00f3ra aonchine\u00e1lacha a shol\u00e1thar. 4<\/sup><\/p>\n\n\n\n

M\u00e1 t\u00e1 a fhios go beacht ar thi\u00fasanna agus ar inn\u00e9acsanna athraonta gach sraithe den FRF, is f\u00e9idir an speictream tarchurtha a r\u00edomh agus is f\u00e9idir tonnfhaid a shannadh do na su\u00edomhanna uasta ar an eagar picteil\u00edn. Mar sin f\u00e9in, is \u00e9 an ti\u00fas ciseal spacer cruinn, a priori, nach bhfuil ar eolas, agus is f\u00e9idir athr\u00fa freisin le linn an n\u00f3s imeachta calabr\u00fa (m.sh., mar gheall ar leathn\u00fa teirmeach). D\u00e1 bhr\u00ed sin, t\u00e1 s\u00e9 dosheachanta ti\u00fas ciseal spacer cruinn a chinneadh ag an am c\u00e9anna le linn an n\u00f3s imeachta calabr\u00fach\u00e1in. R\u00e9it\u00edonn algartam atriallach a forbra\u00edodh an fhadhb seo tr\u00ed dh\u00e1 l\u00edne calabraithe de lampa calabraithe a \u00fas\u00e1id mar l\u00ednte ancaire. 4<\/sup><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

T\u00e1st\u00e1il chruinneas turgnamhach<\/strong><\/p>\n\n

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<\/figcaption><\/figure><\/div>\n\n\n\n
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L\u00e9ir\u00edtear beachtas an algartam calabr\u00fach\u00e1in ag baint \u00fas\u00e1ide as an socr\u00fa turgnamhach i bhF\u00edor 2<\/em> . Ar dt\u00fas, aims\u00edodh dh\u00e1 l\u00edne thagartha (RL3: 435 nm agus RL7: 697 nm) de lampa calabraithe CAL-2000 Hg\/Ar ( Ocean Optics<\/strong> , Dunedin, FL) le haghaidh calabr\u00fa l\u00edneach tosaigh. Ansin, shoilsigh lampa halaigine FRF le ti\u00fas ciseal spacer de 15.6 \u03bcm. Bail\u00edodh an solas tarchurtha ag sn\u00e1ith\u00edn gloine agus treora\u00edodh \u00e9 chuig an speictrim\u00e9adar chun coinn\u00edollacha ionch\u00fapl\u00e1la dea-shainithe a chinnti\u00fa. \u00das\u00e1ideadh mionspeictrim\u00e9adar USB 2000+ \u00f3 Ocean Optics ( T\u00e1bla 1<\/em> ) chun an speictream a bhrath. Ar deireadh, feist\u00edodh ilt\u00e9armach ocht\u00fa c\u00e9im ar na sonra\u00ed (tonnfhad [\u03bb] ag su\u00edomhanna [ p<\/em> ]). D’fhonn feidhm\u00edocht an algartam a imscr\u00fad\u00fa, rinneadh compar\u00e1id idir cruinneas an mhodha calabr\u00fach\u00e1in agus cruinneas an chalabr\u00fach\u00e1in thraidisi\u00fanta. Chun seo, braitheadh go l\u00e9ir tagartha<\/p>\n<\/div>\n<\/div>\n\n

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Baineadh \u00fas\u00e1id as l\u00ednte (RL1-8) agus feist\u00edodh ilt\u00e9armach tr\u00ed\u00fa c\u00e9im ar na sonra\u00ed (tonnfhad [\u03bb] ag su\u00edomhanna [ p<\/em> ]). Cinneadh an cruinneas calabraithe turgnamhach comhfhreagrach tr\u00ed na difr\u00edochta\u00ed idir tonnfhaid na gcuar calabraithe agus na cinn beachta at\u00e1 ar eolas \u00f3 na l\u00ednte mearcair\/arg\u00f3in a r\u00edomh:<\/p>\n\n\n\n

\"\"<\/a><\/figure><\/div>\n<\/div>\n\n\n\n
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T\u00e1bla 1 – Sonra\u00edocht speictrim\u00e9adar<\/strong><\/figcaption><\/figure><\/div>\n<\/div>\n\n

Rinneadh cuaire, \u03ba = \u03bb calib<\/sup> \u2013\u03bb lin<\/sup> , den chuar calabr\u00fach\u00e1in a chinneadh tr\u00edd an difr\u00edocht tonnfhad idir an gn\u00e1thchalabr\u00fa agus an calabr\u00fa l\u00edneach tosaigh a r\u00edomh.<\/p>\n\n

Tortha\u00ed<\/h2>\n\n

T\u00e1 tortha\u00ed na t\u00e1st\u00e1la cruinnis breactha i bhF\u00edor 2. L\u00e9ir\u00edonn an cruinneas calabr\u00fach\u00e1in (barr) c\u00e9 chomh maith agus a at\u00e1irgeann an fheidhm chalabr\u00fach\u00e1in na tonnfhaid tagartha tomhaiste. Is \u00e9 0.4 \u00c5 cruinneas calabraithe an ghn\u00e1thmhodh calabr\u00fach\u00e1in (triant\u00e1in), ach b\u00edonn cruinneas n\u00edos fearr n\u00e1 0.2 \u00c5 (ciorcail) de thoradh an mhodha nua. L\u00e9ir\u00edonn cuaire \u03ba (F\u00edor 2, l\u00e1r) de na cuair chalabr\u00fa neamhl\u00edneacht an scaipthe solais sa mhionspeictrim\u00e9adar. Taispe\u00e1ntar an FRF agus speictream lampa calabr\u00fach\u00e1in ag bun F\u00edor 2.<\/p>\n\n

Mar thoradh ar an modh nua calabr\u00fach\u00e1in t\u00e1 beachtas calabraithe n\u00edos fearr n\u00e1 an modh traidisi\u00fanta. Ina theannta sin, is f\u00e9idir neamhl\u00edneachta de bharr saobhadh gr\u00e1ta n\u00f3 scaipthe inn\u00e9acs athraonta san \u00e1bhar sp\u00e1saire a bhrath. 5<\/sup><\/p>\n\n

Concl\u00faid<\/h2>\n\n

Is \u00e9 an bunt\u00e1iste a bhaineann leis an modh calabr\u00fach\u00e1in a bhfuil cur s\u00edos air anseo n\u00e1 go bhfuil ar a chumas mionspeictrim\u00e9adar neamhl\u00edneach a chalabr\u00fa le haghaidh raonta speictreach nach bhfuil ach c\u00fapla l\u00edne tagartha ar f\u00e1il iontu. Cumasa\u00edonn na buaiceanna calabr\u00fach\u00e1in breise \u00f3n FRF feistis d’ord n\u00edos airde polynomial, rud a fh\u00e1gann go mb\u00edonn cruinneas calabraithe n\u00edos airde. Nocht an modh nua cruinneas calabraithe faoi bhun 0.2 \u00c5, at\u00e1 ar a laghad dh\u00e1 uair chomh cruinn leis an gcalabr\u00fa traidisi\u00fanta. T\u00e1 s\u00e9 t\u00e1bhachtach a thabhairt faoi deara go bhfuarthas an toradh seo tr\u00ed \u00fas\u00e1id a bhaint as m\u00e9id suntasach l\u00ednte calabraithe don ghn\u00e1thchalabr\u00fa. I raonta ina bhfuil n\u00edos l\u00fa l\u00ednte ar f\u00e1il, thiocfadh an difr\u00edocht n\u00edos doimhne, rud a thaispe\u00e1nfadh cumhacht an mhodha calabraithe.<\/p>\n\n

Tagairt\u00ed<\/h2>\n\n
  1. Dorrer, c. J. Rogha Soc. T\u00e1im. b<\/em> 1999<\/strong> , 16<\/em> (7), 1160.<\/li>
  2. Fountain, AW; Vickers, TJ et al. Appl. Spectrosc<\/em>. 1998<\/strong> , 52<\/em> (3), 462.<\/li>
  3. Hamaguchi, HO Appl. Spectrosc. Athr<\/em>. 1988<\/strong> , 24<\/em> (1\u20132), 1378.<\/li>
  4. Perret, E.; Balmer, TD et al. Appl. Spectrosc<\/em>. 2010<\/strong> , 64<\/em> , 1139.<\/li>
  5. Iosraelachvili, JN; Adams, GE J. Ceimic. Soc. I bhfad. tras. m\u00e9<\/em> 1978<\/strong> , 74<\/em> , 9758.<\/li><\/ol>\n

    Is Eola\u00ed \u00e9 an Dr. Perret, Paul Scherrer Institut<\/strong> , 5232 Villigen, An Eilv\u00e9is; teil .: +41 3401394; r\u00edomhphost: edithfu@gmail.com. Is Innealt\u00f3ir \u00c1bhar \u00e9 an Dr. Balmer, ETH Zurich<\/strong> , Zurich, an Eilv\u00e9is. Gabhann na h\u00fadair bu\u00edochas le Ocean Optics<\/strong> (Dunedin, FL) as a dtaca\u00edocht chun speictrim\u00e9adar \u00e9ags\u00fala a th\u00e1st\u00e1il. Mhaoinigh Fond\u00faireacht N\u00e1isi\u00fanta na hEilv\u00e9ise (Bern, an Eilv\u00e9is) an obair seo.<\/em><\/p>\n\n

    Foinse<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    T\u00e1 cruinneas calabraithe speictrim\u00e9adar r\u00edth\u00e1bhachtach do go leor teicn\u00edc\u00ed tr\u00e9ithrithe opt\u00fala mar speictreasc\u00f3pacht Raman agus trasnamh\u00e9adracht. 1\u20133 Go hiond\u00fail, \u00fas\u00e1idtear lampa calabraithe le haghaidh calabr\u00fa speictrim\u00e9adar. Sol\u00e1thra\u00edonn lampa\u00ed calabr\u00fach\u00e1in l\u00ednte saini\u00fala, dea-shainithe ag tonnfhad aitheanta, agus sanntar iad seo d’inn\u00e9acsanna picteil\u00edn\u00ed an bhrathad\u00f3ra. I gc\u00e1s raonta speictreach beaga, \u00e1fach, nuair nach bhfuil ach l\u00edon beag<\/p>\n

    Read More<\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","ub_ctt_via":"","footnotes":""},"categories":[830,829],"tags":[],"class_list":["post-69178","post","type-post","status-publish","format-standard","hentry","category-gach-post","category-speictreafotaimeadracht"],"featured_image_src":null,"author_info":{"display_name":"admin","author_link":"https:\/\/qvarz.com\/ga\/author\/admin\/"},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"bacola-woo-product":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"variation_swatches_image_size":false,"variation_swatches_tooltip_size":false,"dgwt-wcas-product-suggestion":false},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/qvarz.com\/ga\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"T\u00e1 cruinneas calabraithe speictrim\u00e9adar r\u00edth\u00e1bhachtach do go leor teicn\u00edc\u00ed tr\u00e9ithrithe opt\u00fala mar speictreasc\u00f3pacht Raman agus trasnamh\u00e9adracht. 1\u20133 Go hiond\u00fail, \u00fas\u00e1idtear lampa calabraithe le haghaidh calabr\u00fa speictrim\u00e9adar. Sol\u00e1thra\u00edonn lampa\u00ed calabr\u00fach\u00e1in l\u00ednte saini\u00fala, dea-shainithe ag tonnfhad aitheanta, agus sanntar iad seo d’inn\u00e9acsanna picteil\u00edn\u00ed an bhrathad\u00f3ra. I gc\u00e1s raonta speictreach beaga, \u00e1fach, nuair nach bhfuil ach l\u00edon beagRead…","_links":{"self":[{"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/posts\/69178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/comments?post=69178"}],"version-history":[{"count":1,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/posts\/69178\/revisions"}],"predecessor-version":[{"id":69179,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/posts\/69178\/revisions\/69179"}],"wp:attachment":[{"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/media?parent=69178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/categories?post=69178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qvarz.com\/ga\/wp-json\/wp\/v2\/tags?post=69178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}