Nqe lus 2: Fiber optic spectrometer yog dab tsi, thiab koj yuav xaiv qhov kev txiav thiab fiber ntau li cas?
Fiber optic spectrometers tam sim no sawv cev rau cov chav kawm tseem ceeb ntawm spectrometers.Pawg ntawm spectrometer no ua rau kev sib kis ntawm cov teeb liab kho qhov muag los ntawm fiber ntau optic cable, feem ntau hu ua fiber ntau optic jumper, uas pab txhawb kev txhim kho yooj yim thiab yooj yim hauv spectral tsom xam thiab kev teeb tsa.Nyob rau hauv sib piv rau cov pa loj loj kuaj spectrometers nruab nrog focal lengths feem ntau xws li los ntawm 300mm mus rau 600mm thiab ua hauj lwm scanning gratings, fiber optic spectrometers ntiav taag gratings, tshem tawm qhov yuav tsum tau rau rotating motors.Lub focal ntev ntawm cov spectrometers no feem ntau yog nyob rau hauv thaj tsam ntawm 200mm, los yog lawv tuaj yeem luv dua, mus rau 30mm lossis 50mm.Cov cuab yeej no yog qhov loj me me thiab feem ntau hu ua me me fiber ntau optic spectrometers.
Miniature Fiber Spectrometer
Ib qho me me fiber ntau optic spectrometer yog nrov nyob rau hauv kev lag luam vim nws compactness, nqi-zoo, ceev nrhiav tau peev xwm, thiab zoo kawg li saj zawg zog.Qhov me me fiber ntau optic spectrometer feem ntau muaj xws li ib daim iav, concave daim iav, grating, CCD / CMOS ntes, thiab cuam tshuam tsav circuitry.Nws txuas nrog lub party computer (PC) software ntawm ob lub USB cable los yog serial cable kom tiav cov ntaub ntawv spectral.
Fiber optic spectrometer qauv
Lub fiber optic spectrometer yog nruab nrog fiber ntau interface adaptor, muab kev ruaj ntseg kev sib txuas rau fiber ntau optical.SMA-905 fiber ntau interfaces yog siv nyob rau hauv feem ntau fiber optic spectrometers tsis tau tej daim ntawv thov yuav tsum tau FC / PC los yog tsis-tus qauv fiber interfaces, xws li 10 hli inch cylindrical multi-core fiber interface.
SMA905 fiber ntau interface (dub), FC / PC fiber ntau interface (daj).Muaj ib lub qhov nyob rau ntawm FC / PC interface rau qhov chaw.
Lub teeb liab kho qhov muag, tom qab dhau los ntawm cov khoom siv kho qhov muag, yuav xub mus dhau ntawm qhov muag pom.Cov me me spectrometers feem ntau siv cov slits uas tsis kho, qhov twg qhov dav dav yog tsau.Whereas, JINSP fiber optic spectrometer muaj cov qauv slit widths ntawm 10μm, 25μm, 50μm, 100μm, thiab 200μm nyob rau hauv ntau yam specifications, thiab customizations kuj muaj raws li cov neeg siv yuav tsum tau.
Qhov kev hloov pauv ntawm qhov dav dav tuaj yeem cuam tshuam lub teeb flux thiab kho qhov muag pom kev feem ntau, ob qhov tsis zoo no qhia txog kev sib pauv kev sib raug zoo.Narrower qhov dav dav, siab dua qhov kev daws teeb meem kho qhov muag, txawm hais tias ntawm tus nqi ntawm txo lub teeb flux.Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev nthuav dav lub slit kom nce lub teeb flux muaj kev txwv lossis tsis yog linear.Ib yam li ntawd, txo qhov slit muaj kev txwv ntawm qhov kev daws teeb meem.Cov neeg siv yuav tsum tau soj ntsuam thiab xaiv qhov tsim nyog slit raws li lawv cov kev xav tau tiag tiag, xws li muab qhov tseem ceeb rau lub teeb flux lossis kho qhov muag.Hauv qhov no, cov ntaub ntawv qhia txog kev muab rau JINSP fiber optic spectrometers suav nrog cov lus qhia txog kev sib txuas ntawm qhov dav nrog lawv cov kev daws teeb meem sib raug, ua qhov tseem ceeb rau cov neeg siv.
Qhov sib nrug nqaim
Slit-Resolution Table piv
Cov neeg siv, thaum teeb tsa lub spectrometer system, yuav tsum xaiv cov khoom siv kho qhov muag tsim nyog rau kev txais thiab xa cov teeb liab mus rau spectrometer txoj hauj lwm slit.Peb qhov tseem ceeb yuav tsum tau txiav txim siab thaum xaiv cov fibers optical.Thawj qhov ntsuas yog qhov tseem ceeb ntawm txoj kab uas hla, uas muaj nyob rau hauv ntau qhov muaj peev xwm suav nrog 5μm, 50μm, 105μm, 200μm, 400μm, 600μm, thiab txawm tias loj dua diameters tshaj 1mm.Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev nce cov tub ntxhais txoj kab uas hla tuaj yeem txhim kho lub zog tau txais ntawm qhov kawg ntawm qhov kho qhov muag.Txawm li cas los xij, qhov dav ntawm qhov slit thiab qhov siab ntawm CCD / CMOS ntes txwv cov teeb liab kho qhov muag uas lub spectrometer tuaj yeem tau txais.Yog li ntawd, kev nce cov tub ntxhais txoj kab uas hla tsis tas yuav txhim kho rhiab heev.Cov neeg siv yuav tsum xaiv qhov tsim nyog txoj kab uas hla raws li qhov tseeb system configuration.Rau B&W Tek's spectrometers siv linear CMOS detectors nyob rau hauv cov qauv xws li SR50C thiab SR75C, nrog ib tug 50μm slit configuration, nws yog pom zoo kom siv ib tug 200μm core inch optical fiber rau teeb liab txais.Rau spectrometers nrog cheeb tsam sab hauv CCD detectors nyob rau hauv cov qauv xws li SR100B thiab SR100Z, nws yuav tsim nyog los txiav txim siab thicker optical fibers, xws li 400μm los yog 600μm, rau cov teeb liab txais.
Txawv optical fiber diameters
Fiber optic teeb liab txuas mus rau lub slit
Qhov thib ob yog qhov kev khiav hauj lwm wavelength ntau yam thiab cov ntaub ntawv ntawm optical fibers.Cov khoom siv fiber ntau feem ntau suav nrog High-OH (high hydroxyl), Low-OH (low hydroxyl), thiab UV-resistant fibers.Cov khoom sib txawv muaj qhov sib txawv wavelength kis tau tus yam ntxwv.High-OH optical fibers feem ntau yog siv nyob rau hauv ultraviolet / pom lub teeb ntau (UV / VIS), thaum Low-OH fibers yog siv nyob rau hauv ze-infrared (NIR) ntau yam.Rau ultraviolet ntau yam, tshwj xeeb UV-resistant fibers yuav tsum tau xav txog.Cov neeg siv yuav tsum xaiv qhov tsim nyog fiber ntau raws li lawv cov kev khiav hauj lwm wavelength.
Qhov thib peb nam yog tus lej aperture (NA) tus nqi ntawm optical fibers.Vim yog lub hauv paus ntsiab lus ntawm emission ntawm optical fibers, lub emitted lub teeb los ntawm lub fiber kawg yog kaw nyob rau hauv ib tug tej yam txawv divergence kaum sab xis, uas yog yus muaj los ntawm tus nqi NA.Multi-mode optical fibers feem ntau muaj NA qhov tseem ceeb ntawm 0.1, 0.22, 0.39, thiab 0.5 raws li kev xaiv.Ua piv txwv ntau tshaj 0.22 NA, nws txhais tau hais tias qhov chaw kab ntawm cov fiber ntau tom qab 50 hli yog kwv yees li 22 hli, thiab tom qab 100 hli, txoj kab uas hla yog 44 hli.Thaum tsim cov spectrometer, cov tuam txhab tsim khoom feem ntau xav txog qhov sib txuam ntawm qhov muag fiber ntau NA tus nqi kom ze li sai tau los xyuas kom meej qhov siab tshaj plaws kev txais tos.Tsis tas li ntawd, NA tus nqi ntawm cov khoom siv kho qhov muag muaj feem xyuam nrog kev sib txuas ntawm cov lo ntsiab muag ntawm qhov kawg ntawm lub fiber.Tus nqi NA ntawm lub lens yuav tsum tau sib phim kom ze li sai tau rau NA tus nqi ntawm cov fiber ntau kom tsis txhob poob teeb liab.
Tus nqi NA ntawm cov fiber ntau kho qhov muag txiav txim siab lub divergence lub kaum sab xis ntawm lub teeb pom kev zoo
Thaum siv cov fibers kho qhov muag ua ke nrog cov lo ntsiab muag lossis cov iav concave, NA tus nqi yuav tsum tau muab sib xyaw kom zoo li sai tau kom tsis txhob muaj zog poob.
Fiber optic spectrometers tau txais lub teeb ntawm cov ces kaum txiav txim los ntawm lawv NA (Numerical Aperture) tus nqi.Lub teeb liab teeb meem yuav raug siv tag nrho yog tias NA ntawm qhov teeb meem teeb meem tsawg dua los yog sib npaug rau qhov spectrometer's NA.Lub zog poob tshwm sim thaum NA ntawm teeb pom kev zoo siab dua NA ntawm spectrometer.Ntxiv nrog rau kev sib kis ntawm fiber ntau optic, qhov chaw pub dawb tuaj yeem siv los sau cov teeb liab.Qhov no suav nrog kev sib txuas lub teeb sib luag rau hauv ib qho kev siv lo ntsiab muag.Thaum siv qhov chaw kho qhov muag qhov chaw dawb, nws yog ib qho tseem ceeb uas yuav tsum xaiv cov lo ntsiab muag uas tsim nyog nrog NA tus nqi sib piv ntawm cov spectrometer, thaum tseem ua kom ntseeg tau tias lub spectrometer lub slit yog nyob rau ntawm lub ntsej muag ntawm lub lens kom ua tiav lub teeb ci siab tshaj plaws.
Dawb qhov chaw optical coupling
Post lub sij hawm: Dec-13-2023