Optical teeb pom kev zookho vajtse spectrometer
A spectrometeryog ib qho khoom siv kho qhov muag uas cais lub teeb polychromatic rau hauv ib qho spectrum. Muaj ntau hom spectrometers, ntxiv rau cov spectrometers siv nyob rau hauv lub teeb pom kev zoo, muaj infrared spectrometers thiab ultraviolet spectrometers. Raws li qhov sib txawv dispersion ntsiab, nws tuaj yeem muab faib ua prism spectrometer, grating spectrometer thiab cuam tshuam spectrometer. Raws li txoj kev tshawb pom, muaj cov spectroscopes rau kev soj ntsuam qhov muag ncaj qha, spectroscopes rau cov ntaub ntawv nrog cov duab thaij duab, thiab cov spectrophotometers rau kev ntes spectro nrog photoelectric lossis thermoelectric ntsiab. Lub monochromator yog ib qho cuab yeej spectral uas tso tawm tsuas yog ib kab chromatographic nkaus xwb los ntawm txoj hlua, thiab feem ntau yog siv ua ke nrog lwm cov cuab yeej tshuaj ntsuam xyuas.
Ib tug raug spectrometer muaj ib tug kho qhov muag platform thiab ib tug nrhiav kom tau qhov system. Nws suav nrog cov hauv qab no tseem ceeb:
1. Kev tshwm sim slit: cov khoom taw tes ntawm lub imaging system ntawm lub spectrometer tsim nyob rau hauv lub irradiation ntawm qhov teeb meem teeb.
2. Collimation caij: lub teeb emitted los ntawm lub slit ua rau tib lub teeb. Cov khoom sib xyaw ua ke tuaj yeem yog lub lens ywj siab, daim iav, lossis ncaj qha kev sib xyaw ntawm cov khoom sib cais, xws li cov kab sib txuas hauv cov kab sib txuas ntawm cov spectrometer.
(3) Dispersion element: feem ntau yog siv lub grating, kom lub teeb teeb liab nyob rau hauv qhov chaw raws li lub wavelength dispersion mus rau ntau kab teeb.
4. Focusing element: Tsom kom pom cov kab sib txawv kom nws tsim cov duab ntawm qhov xwm txheej ntawm lub dav hlau focal, qhov twg txhua daim duab taw tes sib raug rau ib lub wavelength tshwj xeeb.
5. Detector array: muab tso rau ntawm lub dav hlau focal rau ntsuas lub teeb siv ntawm txhua lub wavelength duab point. Lub ntes array tuaj yeem yog CCD array lossis lwm hom teeb pom kev array.
Feem ntau cov spectrometers nyob rau hauv lub chaw soj nstuam loj yog CT qauv, thiab chav kawm ntawm spectrometers no tseem hu ua monochromators, uas feem ntau muab faib ua ob pawg:
1, symmetrical off-axis scanning CT qauv, cov qauv no yog txoj kev kho qhov muag sab hauv yog qhov sib luag, lub grating ntauwd log muaj tsuas yog ib qho hauv nruab nrab. Vim yog ua tiav symmetry, yuav muaj qhov sib txawv ntawm qhov sib txawv, uas ua rau lub teeb tsis muaj zog tshwj xeeb, thiab vim tias nws yog qhov ntsuas tawm ntawm qhov chaw, qhov tseeb yuav raug txo.
2, asymmetric axial scanning CT qauv, uas yog, txoj kev kho qhov muag sab hauv tsis yog qhov sib luag, lub grating ntauwd log muaj ob lub hauv paus axes, los xyuas kom meej tias lub grating rotation yog scanned nyob rau hauv lub axis, zoo inhibit stray lub teeb, txhim kho qhov tseeb. Tus tsim ntawm asymmetric in-axis scanning CT qauv revolves nyob ib ncig ntawm peb lub ntsiab lus tseem ceeb: optimizing cov duab zoo, tshem tawm theem nrab diffracted lub teeb, thiab maximizing luminous flux.
Nws cov khoom tseem ceeb yog: A. xwm txheejqhov kajB. Txoj kab nkag C. daim iav collimating D. grating E. tsom iav F. Tawm (slit) G.photodetector
Spectroscope (Spectroscope) yog cov cuab yeej tshawb fawb uas ua rau cov teeb pom kev nyuaj rau hauv cov kab spectral, muaj cov prisms lossis diffraction gratings, thiab lwm yam, siv lub spectrometer los ntsuas lub teeb pom ntawm qhov chaw ntawm ib qho khoom. Lub xya xim lub teeb nyob rau hauv lub hnub yog ib feem ntawm qhov muag liab qab yuav muab faib (pom lub teeb), tab sis yog hais tias lub spectrometer yuav decompose lub hnub, raws li lub wavelength kev npaj, pom lub teeb tsuas yog rau ib tug me me ntawm cov spectrum, tus so yog qhov muag liab qab tsis tuaj yeem paub qhov txawv ntawm cov spectrum, xws li infrared, microwave, ultraviolet, X-ray thiab lwm yam. Los ntawm kev ntes cov ntaub ntawv lub teeb los ntawm lub spectrometer, kev txhim kho ntawm daim phiaj duab, lossis lub computer tsis siv neeg cov khoom siv cov lej tso saib thiab tshuaj xyuas, txhawm rau txheeb xyuas cov ntsiab lus twg muaj nyob hauv kab lus. Cov tshuab no tau siv dav hauv kev tshawb nrhiav cov pa phem, dej qias neeg, zaub mov huv, kev lag luam hlau thiab lwm yam.
Post lub sij hawm: Sep-05-2024