Ma spectrometer a fiber optical nthawi zambiri amagwiritsa ntchito fiber optical ngati cholumikizira chizindikiro, chomwe chimalumikizidwa ndi spectrometer kuti chiwunikire ma spectral. Chifukwa cha kusavuta kwa fiber optical, ogwiritsa ntchito amatha kusinthasintha kwambiri kuti apange njira yopezera ma spectrum.
Ubwino wa ma fiber optic spectrometer ndi modularity ndi kusinthasintha kwa njira yoyezera.spectrometer ya fiber opticalkuchokera ku MUT ku Germany ndi yachangu kwambiri kotero kuti ingagwiritsidwe ntchito pofufuza pa intaneti. Ndipo chifukwa cha kugwiritsa ntchito zida zoyesera zotsika mtengo, mtengo wa spectrometer umachepetsedwa, motero mtengo wa njira yonse yoyezera umachepetsedwa.
Kapangidwe koyambira ka fiber optic spectrometer kamakhala ndi grating, slit, ndi detector. Ma parameter a zigawo izi ayenera kufotokozedwa bwino pogula spectrometer. Kagwiridwe ka ntchito ka spectrometer kamadalira kuphatikiza kolondola ndi kulinganiza kwa zigawo izi, pambuyo polinganiza spectrometer ya fiber optical, kwenikweni, zowonjezera izi sizingasinthe chilichonse.
Chiyambi cha ntchito
sefa
Kusankha grating kumadalira mtundu wa spectral ndi zofunikira pa resolution. Pa ma fiber optic spectrometer, mtundu wa spectral nthawi zambiri umakhala pakati pa 200nm ndi 2500nm. Chifukwa cha kufunika kwa resolution yayikulu, zimakhala zovuta kupeza mtundu wa wide spectral; Nthawi yomweyo, kufunika kwa resolution yayikulu, kuwala kochepa. Pazofunikira pa resolution yotsika komanso mtundu wa spectral wokulirapo, grating ya 300 line / mm ndiyo njira yachizolowezi. Ngati resolution yayikulu ikufunika, ikhoza kuchitika posankha grating yokhala ndi mizere 3600 / mm, kapena kusankha chowunikira chokhala ndi resolution yochulukirapo ya pixel.
kudula
Mpata wopapatiza ungathandize kuti kuwala kuwoneke bwino, koma kuwalako kumakhala kochepa; Kumbali inayi, mpata wokulirapo ungapangitse kuti kuwala kuwoneke bwino, koma popanda kuoneka bwino. Pazofunikira zosiyanasiyana zogwiritsira ntchito, mpata woyenera umasankhidwa kuti ukhale wabwino kwambiri.
kafukufuku
Chowunikira m'njira zina chimatsimikizira kutsimikizika ndi kukhudzidwa kwa fiber optic spectrometer, dera lozindikira kuwala pa chowunikira kwenikweni ndi lochepa, limagawidwa m'ma pixel ang'onoang'ono ambiri kuti azitha kuwunikira kwambiri kapena kugawidwa m'ma pixel ochepa koma akuluakulu kuti azitha kuwunikira kwambiri. Kawirikawiri, kukhudzidwa kwa chowunikira cha CCD kumakhala bwino, kotero mutha kupeza kutsimikizika bwino popanda kukhudzidwa pang'ono. Chifukwa cha kukhudzidwa kwakukulu ndi phokoso la kutentha kwa chowunikira cha InGaAs pafupi ndi infrared, chiŵerengero cha chizindikiro-kwa-phokoso cha dongosolochi chingawongoleredwe bwino pogwiritsa ntchito firiji.
fyuluta yowala
Chifukwa cha mphamvu ya multistage diffraction ya spectrum yokha, kusokoneza kwa multistage diffraction kungachepe pogwiritsa ntchito fyuluta. Mosiyana ndi ma spectrometer achikhalidwe, ma fiber optic spectrometer amakutidwa pa detector, ndipo gawo ili la ntchito liyenera kuyikidwa pamalo ake ku fakitale. Nthawi yomweyo, chophimbacho chilinso ndi ntchito yotsutsana ndi kuwunikira ndipo chimakweza chiŵerengero cha chizindikiro-ku-phokoso cha dongosolo.
Kugwira ntchito kwa spectrometer kumatsimikiziridwa makamaka ndi kuchuluka kwa ma spectral, kuwala kwa kuwala, ndi kukhudzidwa. Kusintha kwa chimodzi mwa izi nthawi zambiri kumakhudza kugwira ntchito kwa ma parameter ena.
Vuto lalikulu la spectrometer si kukulitsa magawo onse panthawi yopanga, koma kupanga zizindikiro zaukadaulo za spectrometer kukwaniritsa zofunikira pa ntchito zosiyanasiyana pakusankha malo awa amitundu itatu. Njira iyi imalola spectrometer kukwaniritsa makasitomala kuti apeze phindu lalikulu ndi ndalama zochepa. Kukula kwa cube kumadalira zizindikiro zaukadaulo zomwe spectrometer ikufunika kukwaniritsa, ndipo kukula kwake kumakhudzana ndi kuuma kwa spectrometer ndi mtengo wa chinthu cha spectrometer. Zogulitsa za spectrometer ziyenera kukwaniritsa mokwanira magawo aukadaulo omwe makasitomala amafunikira.
Mitundu ya Spectral
Ma spectrometerndi ma spectral range ochepa nthawi zambiri amapereka zambiri za ma spectral, pomwe ma spectral range akuluakulu amakhala ndi ma spectral range ambiri. Chifukwa chake, ma spectral range a spectral spectrum ndi chimodzi mwa zinthu zofunika kwambiri zomwe ziyenera kufotokozedwa bwino.
Zinthu zomwe zimakhudza mtundu wa spectral makamaka ndi grating ndi detector, ndipo grating ndi detector yofanana imasankhidwa malinga ndi zofunikira zosiyanasiyana.
kuzindikira
Ponena za kukhudzidwa, ndikofunikira kusiyanitsa pakati pa kukhudzidwa mu photometry (mphamvu yaying'ono kwambiri ya chizindikiro yomwe aspectromitakungathe kuzindikira) ndi kukhudzidwa mu stoichiometry (kusiyana kochepa kwambiri pakuyamwa komwe spectrometer ingathe kuyeza).
a. Kuzindikira kwa Photometric
Pa ntchito zomwe zimafuna ma spectrometer odziwika bwino, monga fluorescence ndi Raman, tikupangira ma SEK thermo-cooled optical fiber spectrometers okhala ndi thermo-cooled 1024 pixel two-dimensional array CCD detectors, komanso ma detector condensing lens, magalasi agolide, ndi mipata yayikulu (100μm kapena yokulirapo). Mtundu uwu ungagwiritse ntchito nthawi yayitali yolumikizirana (kuyambira ma millisecond 7 mpaka mphindi 15) kuti uwonjezere mphamvu ya chizindikiro, ndipo ukhoza kuchepetsa phokoso ndikuwongolera dynamic range.
b. Kuzindikira kwa Stoichiometric
Kuti muzindikire kuchuluka kwa ma absorption komwe kuli pafupi kwambiri, sikufunika mphamvu yokha ya detector, komanso chiŵerengero cha chizindikiro-mpaka-phokoso. Detector yokhala ndi chiŵerengero chapamwamba kwambiri cha chizindikiro-mpaka-phokoso ndi thermoelectric refrigerated 1024-pixel two-dimensional array CCD detector mu SEK spectrometer yokhala ndi chiŵerengero cha chizindikiro-mpaka-phokoso cha 1000:1. Avereji ya zithunzi zambiri za spectral ingawongolerenso chiŵerengero cha chizindikiro-mpaka-phokoso, ndipo kuwonjezeka kwa chiwerengero cha avareji kudzapangitsa kuti chiŵerengero cha chizindikiro-mpaka-phokoso chiwonjezeke pa liwiro la muzu wa sikweya, mwachitsanzo, avareji ya nthawi 100 ikhoza kuwonjezera chiŵerengero cha chizindikiro-mpaka-phokoso nthawi 10, kufika pa 10,000:1.
Mawonekedwe
Kuwona bwino kwa kuwala ndi chinthu chofunikira kwambiri poyesa kuthekera kogawa kuwala. Ngati mukufuna kuwona bwino kwambiri, tikukulangizani kuti musankhe grating yokhala ndi mizere 1200/mm kapena kuposerapo, pamodzi ndi mpata wopapatiza komanso chowunikira cha CCD cha 2048 kapena 3648 pixel.
Nthawi yotumizira: Julayi-27-2023