Ntchito ya optical fiber spectrometer

Ma optical fiber spectrometers nthawi zambiri amagwiritsa ntchito ulusi wa kuwala ngati cholumikizira chizindikiro, chomwe chimakhala ndi chithunzithunzi chophatikizidwa ndi spectrometer kuti chiwunikidwe. Chifukwa cha kuphweka kwa fiber optical, ogwiritsa ntchito amatha kusinthasintha kwambiri kuti apange makina opangira ma spectrum.

Ubwino wa fiber optic spectrometers ndikusinthasintha komanso kusinthasintha kwa njira yoyezera. The microoptical fiber spectrometerkuchokera ku MUT ku Germany ndiyofulumira kwambiri kotero kuti itha kugwiritsidwa ntchito posanthula pa intaneti. Ndipo chifukwa chogwiritsa ntchito zowunikira zotsika mtengo zapadziko lonse lapansi, mtengo wa spectrometer umachepetsedwa, motero mtengo wa njira yonse yoyezera umachepetsedwa.

Kusintha kofunikira kwa fiber optic spectrometer imakhala ndi grating, slit, ndi chowunikira. Magawo a zigawozi ayenera kufotokozedwa pogula spectrometer. Kuchita kwa spectrometer kumadalira kuphatikizika kolondola komanso kusanja kwa zigawozi, pambuyo pa kuwongolera kwa optical fiber spectrometer, makamaka, zowonjezera izi sizingakhale ndi kusintha kulikonse.

Chiyambi cha ntchito

kukwapula

Kusankhidwa kwa grating kumatengera mtundu wa spectral ndi zofunikira pakuwongolera. Kwa ma fiber optic spectrometers, mawonekedwe owonera nthawi zambiri amakhala pakati pa 200nm ndi 2500nm. Chifukwa cha kufunikira kwa kusamvana kwakukulu, zimakhala zovuta kupeza mawonekedwe osiyanasiyana; Pa nthawi yomweyi, kufunikira kwa kusamvana kwapamwamba, kutsika kochepa kowala. Pazofunikira pakuwongolera kocheperako komanso mawonekedwe okulirapo, 300 mzere / mm grating ndiye chisankho chokhazikika. Ngati chiwongolero chapamwamba chikufunika, chikhoza kutheka posankha grating yokhala ndi mizere 3600 / mm, kapena kusankha chowunikira chokhala ndi ma pixel ambiri.

kudula

Kutsetsereka kocheperako kumatha kuwongolera kusintha, koma kuwala kocheperako kumakhala kochepa; Kumbali inayi, mikwingwirima yokulirapo imatha kukulitsa chidwi, koma pakuwononga kukonza. Pazofunikira zosiyanasiyana zogwiritsira ntchito, m'lifupi mwake moyenerera amasankhidwa kuti akwaniritse zotsatira zonse za mayeso.

kufufuza

Chojambulira mwanjira zina chimatsimikizira kusamvana ndi kukhudzika kwa fiber optic spectrometer, chigawo chowunikira chowunikira pa chojambuliracho chimakhala chochepa, chimagawidwa m'mapikseli ang'onoang'ono ang'onoang'ono kuti athetse kapena kugawidwa kukhala ma pixel ocheperako koma akuluakulu. Nthawi zambiri, kukhudzika kwa chowunikira cha CCD ndikwabwinoko, kotero mutha kupeza lingaliro labwinoko popanda kukhudzidwa pang'ono. Chifukwa cha kutengeka kwakukulu komanso phokoso la kutentha kwa chowunikira cha InGaAs pafupi ndi infrared, chiŵerengero cha chizindikiro ndi phokoso la dongosololi chikhoza kusinthidwa bwino pogwiritsa ntchito firiji.

Zosefera zowonera

Chifukwa cha multistage diffraction effect ya sipekitiramu yokha, kusokoneza kwa multistage diffraction kumatha kuchepetsedwa pogwiritsa ntchito fyuluta. Mosiyana ndi ma spectrometer wamba, ma fiber optic spectrometer amakutidwa pa chowunikira, ndipo gawo ili la ntchitoyo liyenera kuyikidwa pamalo pafakitale. Panthawi imodzimodziyo, chophimbacho chimakhalanso ndi ntchito yotsutsa-kulingalira komanso kumapangitsa kuti chiŵerengero cha chizindikiro ndi phokoso la dongosolo.

Ntchito ya spectrometer imatsimikiziridwa makamaka ndi mawonekedwe a spectral, kusamvana kwa kuwala ndi kukhudzidwa. Kusintha kumodzi mwa magawowa nthawi zambiri kumakhudza magwiridwe antchito a magawo ena.

Chovuta chachikulu cha spectrometer sichikukulitsa magawo onse panthawi yopanga, koma kupanga zizindikiro zaumisiri za spectrometer kuti zikwaniritse zofunikira za ntchito zosiyanasiyana pakupanga malo atatuwa. Njirayi imathandizira spectrometer kukhutiritsa makasitomala kuti abwererenso kwambiri ndi ndalama zochepa. Kukula kwa cube kumatengera zisonyezo zaukadaulo zomwe spectrometer imayenera kukwaniritsa, ndipo kukula kwake kumagwirizana ndi zovuta za spectrometer ndi mtengo wazinthu za spectrometer. Zogulitsa za Spectrometer ziyenera kukwaniritsa zofunikira zamakasitomala.

Mtundu wa Spectral

Ma spectrometersokhala ndi mawonekedwe ang'onoang'ono nthawi zambiri amapereka chidziwitso chatsatanetsatane, pomwe mawonedwe akulu amakhala ndi mawonekedwe okulirapo. Chifukwa chake, ma spectral osiyanasiyana a spectrometer ndi amodzi mwamagawo ofunikira omwe ayenera kufotokozedwa momveka bwino.

Zinthu zomwe zimakhudza mawonekedwe a spectral makamaka grating ndi detector, ndipo grating yofananira ndi detector imasankhidwa malinga ndi zofunikira zosiyanasiyana.

kumva

Ponena za kukhudzika, ndikofunikira kusiyanitsa pakati pa kukhudzidwa mu photometry (mphamvu yaying'ono kwambiri yomwe aspectrometeramatha kuzindikira) komanso kukhudzidwa mu stoichiometry (kusiyana kocheperako pakuyamwa komwe spectrometer imatha kuyeza).

a. Photometric sensitivity

Pazinthu zomwe zimafuna ma spectrometer apamwamba, monga fluorescence ndi Raman, timalimbikitsa SEK thermo-utakhazikika kuwala CHIKWANGWANI spectrometers ndi thermo-utakhazikika 1024 mapikiselo awiri dimensional array array CCD detectors, komanso chojambulira condensing magalasi, magalasi golide, ndi slits lonse ( 100μm kapena kupitirira apo). Mtunduwu ukhoza kugwiritsa ntchito nthawi yayitali yophatikizira (kuchokera ku 7 milliseconds mpaka mphindi 15) kuti upangitse mphamvu yazizindikiro, ndipo utha kuchepetsa phokoso ndikuwongolera mawonekedwe osinthika.

b. Stoichiometric sensitivity

Kuti muzindikire zikhalidwe ziwiri zoyamwa ndi matalikidwe oyandikira kwambiri, osati kutengeka kwa detector kokha, komanso chiŵerengero cha signal-to-phokoso chikufunika. Chojambulira chokhala ndi chiŵerengero chapamwamba kwambiri cha signal-to-phokoso ndi thermoelectric refrigerated 1024-pixel two-dimensional array CCD detector mu SEK spectrometer yokhala ndi chiŵerengero cha phokoso la 1000: 1. Avereji ya zithunzi zowoneka bwino zimathanso kusintha chiŵerengero cha ma signal-to-phokoso, ndipo kuwonjezeka kwa chiwerengero kumapangitsa kuti chiŵerengero cha ma signal-to-noise chiwonjezeke pa liwiro la mizu, mwachitsanzo, nthawi zambiri za 100 zimatha. onjezerani chiŵerengero cha ma signal-to-phokoso maulendo 10, kufika pa 10,000: 1.

Kusamvana

Kusamvana kwa Optical ndi gawo lofunikira poyezera luso logawanika la kuwala. Ngati mukufuna mawonekedwe apamwamba kwambiri, tikupangira kuti musankhe kabati yokhala ndi mizere 1200/mm kapena kupitilira apo, pamodzi ndi kang'ono kakang'ono ndi chowunikira cha CCD 2048 kapena 3648.