Ama-spectrometer e-optical fiber ngokuvamile asebenzisa i-optical fiber njengesixhumi sesiginali, esizohlanganiswa ne-photometric ne-spectrometer ukuze kuhlaziywe ama-spectral. Ngenxa yokuthi i-optical fiber ilula, abasebenzisi bangakwazi ukuguquguquka kakhulu ekwakheni uhlelo lokuthola ama-spectrum.
Inzuzo yama-spectrometer e-fiber optic ukuthi uhlelo lokulinganisa lune-modularity kanye nokuguquguquka.i-spectrometer yefayibha yokukhanyakusuka ku-MUT eJalimane kuyashesha kangangokuthi kungasetshenziswa ekuhlaziyeni okuku-inthanethi. Futhi ngenxa yokusetshenziswa kwezitholi ezishibhile zomhlaba wonke, izindleko ze-spectrometer ziyancishiswa, ngaleyo ndlela izindleko zohlelo lonke lokulinganisa ziyancishiswa.
Ukucushwa okuyisisekelo kwe-fiber optic spectrometer kuqukethe i-grating, i-slit, kanye ne-detector. Amapharamitha alezi zingxenye kumele acaciswe lapho uthenga i-spectrometer. Ukusebenza kwe-spectrometer kuncike ekuhlanganisweni okunembile kanye nokulinganiswa kwalezi zingxenye, ngemva kokulinganiswa kwe-optical fiber spectrometer, ngokomthetho, lezi zesekeli azikwazi ukuba nezinguquko.
Isingeniso somsebenzi
i-grating
Ukukhetha i-grating kuncike kububanzi be-spectral kanye nezidingo ze-resolution. Kuma-fiber optic spectrometer, ububanzi be-spectral buvame ukuba phakathi kuka-200nm no-2500nm. Ngenxa yesidingo se-resolution ephezulu, kunzima ukuthola ububanzi be-spectral; Ngesikhathi esifanayo, uma isidingo se-resolution siphezulu, i-flux encane ekhanyayo. Ngezidingo ze-resolution ephansi kanye nobubanzi be-spectral, i-grating engu-300 line /mm iyisinqumo esivamile. Uma kudingeka i-resolution ephezulu ye-spectral, ingafinyelelwa ngokukhetha i-grating enemigqa engu-3600 /mm, noma ukukhetha i-detector ene-resolution yamaphikseli amaningi.
umqhekezo
Isikhala esincane singathuthukisa ukucaca, kodwa ukukhanya kuncane; Ngakolunye uhlangothi, izikhala ezibanzi zingandisa ukuzwela, kodwa ngezindleko zokucaca. Ezidingweni ezahlukene zokusetshenziswa, kukhethwa ububanzi besikhala esifanele ukuze kuthuthukiswe umphumela wokuhlolwa ojwayelekile.
i-probe
I-detector ngezindlela ezithile inquma ukucaca kanye nokuzwela kwe-fiber optic spectrometer, indawo ezwela ukukhanya kumtholi ngokuyisisekelo inqunyelwe, ihlukaniswe ngamaphikseli amaningi amancane ukuze kube nesisombululo esiphezulu noma ihlukaniswe ngamaphikseli ambalwa kodwa amakhulu ukuze kube nesisindo esiphezulu. Ngokuvamile, ukuzwela komtholi we-CCD kungcono, ngakho-ke ungathola ukucaca okungcono ngaphandle kokuzwela ngezinga elithile. Ngenxa yokuzwela okuphezulu nomsindo wokushisa komtholi we-InGaAs eduze kwe-infrared, isilinganiso sesiginali-kumsindo sohlelo singathuthukiswa ngempumelelo ngokusebenzisa isiqandisi.
Isihlungi se-Optical
Ngenxa yomphumela we-multistage diffraction we-spectrum uqobo, ukuphazamiseka kwe-multistage diffraction kungancishiswa ngokusebenzisa isihlungi. Ngokungafani nama-spectrometer avamile, ama-fiber optic spectrometer ambozwe ku-detector, futhi le ngxenye yomsebenzi idinga ukufakwa endaweni yayo efektri. Ngesikhathi esifanayo, i-coating nayo inomsebenzi wokulwa nokukhanya futhi ithuthukisa isilinganiso sesignali-kuya-kumsindo sohlelo.
Ukusebenza kwe-spectrometer kunqunywa kakhulu ububanzi be-spectral, i-optical resolution kanye nokuzwela. Ushintsho kwenye yalezi parameter luvame ukuthinta ukusebenza kwamanye ama-parameter.
Inselele enkulu ye-spectrometer akukhona ukukhulisa wonke amapharamitha ngesikhathi sokukhiqiza, kodwa ukwenza izinkomba zobuchwepheshe ze-spectrometer zihlangabezane nezidingo zokusebenza kwezinhlelo zokusebenza ezahlukene kulokhu kukhethwa kwesikhala esinezinhlangothi ezintathu. Leli cebo lenza i-spectrometer ikwazi ukwanelisa amakhasimende ukuze athole inzuzo ephezulu ngokutshala imali okuncane. Usayizi we-cube uncike ezinkomba zobuchwepheshe okudingeka i-spectrometer izifinyelele, futhi usayizi wayo uhlobene nobunzima be-spectrometer kanye nentengo yomkhiqizo we-spectrometer. Imikhiqizo ye-Spectrometer kufanele ihlangabezane ngokugcwele nemingcele yezobuchwepheshe edingwa amakhasimende.
Uhla lwe-Spectral
Ama-Spectrometerngebanga elincane le-spectral ngokuvamile inikeza ulwazi oluningiliziwe lwe-spectral, kanti ububanzi obukhulu be-spectral bunobubanzi obubonakalayo. Ngakho-ke, ububanzi be-spectral be-spectrometer bungenye yemingcele ebalulekile okumele icaciswe ngokucacile.
Izici ezithinta ububanzi be-spectral ikakhulukazi i-grating kanye ne-detector, kanti i-grating kanye ne-detector ehambisanayo kukhethwa ngokwezidingo ezahlukene.
ukuzwela
Uma sikhuluma ngokuzwela, kubalulekile ukuhlukanisa phakathi kokuzwela ku-photometry (amandla amancane kakhulu esignali atholakala ku-i-spectrometerkungatholakala) kanye nokuzwela ku-stoichiometry (umehluko omncane kakhulu ekumuncweni ongalinganiswa yi-spectrometer).
a. Ukuzwela kwe-Photometric
Kuzinhlelo zokusebenza ezidinga ama-spectrometer okuzwela okuphezulu, njenge-fluorescence kanye ne-Raman, sincoma ama-spectrometer e-fiber optical e-SEK apholile nge-thermo-cooled anama-detector e-CCD angu-1024 pixel ane-thermo-cooled two-dimensional array CCD, kanye nama-lens okuthola ama-condensing, izibuko zegolide, kanye nama-slits abanzi (100μm noma abanzi). Lo modeli ungasebenzisa izikhathi zokuhlanganisa ezinde (kusukela kuma-millisecond angu-7 kuya kumaminithi angu-15) ukuthuthukisa amandla esignali, futhi unganciphisa umsindo futhi uthuthukise ububanzi obuguqukayo.
b. Ukuzwela kwe-Stoichiometric
Ukuze kutholakale amanani amabili esilinganiso sokumuncwa nge-amplitude eseduze kakhulu, akudingeki nje kuphela ukuzwela komtshina, kodwa futhi kudingeka isilinganiso sesignali kuya kumsindo. Umtshina onesilinganiso sesignali kuya kumsindo esiphezulu kakhulu umtshina we-thermoelectric ofrijiwe ongu-1024-pixel two-dimensional array CCD ku-SEK spectrometer enesilinganiso sesignali kuya kumsindo esingu-1000:1. Isilinganiso sezithombe eziningi ze-spectral singathuthukisa futhi isilinganiso sesignali kuya kumsindo, futhi ukwanda kwenani elimaphakathi kuzobangela ukuthi isilinganiso sesignali kuya kumsindo sikhuphuke ngesivinini sempande yesikwele, isibonelo, isilinganiso sezikhathi eziyi-100 singakhulisa isilinganiso sesignali kuya kumsindo izikhathi eziyi-10, sifinyelele ku-10,000:1.
Isixazululo
Isixazululo sokubona siyipharamitha ebalulekile yokulinganisa ikhono lokuhlukaniswa kwe-optical. Uma udinga isixazululo sokubona esiphezulu kakhulu, sincoma ukuthi ukhethe i-grating enemigqa engu-1200/mm noma ngaphezulu, kanye nomngxuma omncane kanye ne-detector ye-CCD engu-2048 noma engu-3648 pixel.
Isikhathi sokuthunyelwe: Julayi-27-2023