Lub tshuab ntsuas qhov muag pom kev kho vajtse

Kev kuaj pom teeb liabcov khoom siv kho vajtse spectrometer
A lub tshuab ntsuas spectrometeryog ib qho cuab yeej kho qhov muag uas cais cov teeb pom kev zoo polychromatic ua ib lub spectrum. Muaj ntau hom spectrometers, ntxiv rau cov spectrometers siv hauv cov teeb pom kev zoo, muaj infrared spectrometers thiab ultraviolet spectrometers. Raws li cov khoom sib txawv dispersion, nws tuaj yeem faib ua prism spectrometer, grating spectrometer thiab interference spectrometer. Raws li txoj kev tshawb pom, muaj spectroscopes rau kev soj ntsuam qhov muag ncaj qha, spectroscopes rau kev kaw nrog cov yeeb yaj kiab photosensitive, thiab spectrophotometers rau kev ntes spectra nrog photoelectric lossis thermoelectric elements. Ib lub monochromator yog ib qho cuab yeej spectral uas tso tawm tsuas yog ib kab chromatographic los ntawm ib qho slit, thiab feem ntau siv ua ke nrog lwm cov cuab yeej analytical.
Ib lub spectrometer feem ntau muaj ib lub platform optical thiab ib lub detection system. Nws muaj cov khoom tseem ceeb hauv qab no:
1. Qhov chaw tshwm sim: qhov chaw ntawm lub tshuab thaij duab ntawm lub spectrometer tsim nyob rau hauv qab kev cuam tshuam ntawm lub teeb pom kev.
2. Lub teeb sib txuas: lub teeb uas tawm los ntawm qhov txiav ua lub teeb sib luag. Lub teeb sib txuas yuav yog lub lens ywj pheej, daim iav, lossis ncaj qha koom ua ke rau ntawm lub teeb sib kis, xws li lub grating concave hauv lub spectrometer grating concave.
(3) Lub ntsiab lus tawg: feem ntau siv lub grating, yog li ntawd lub teeb liab nyob rau hauv qhov chaw raws li qhov wavelength dispersion rau hauv ntau lub beams.
4. Lub ntsiab lus tsom: Tsom lub teeb dispersive kom nws tsim cov duab txiav ntawm qhov chaw tsom, qhov twg txhua qhov duab sib xws rau qhov wavelength tshwj xeeb.
5. Cov khoom siv ntes teeb: muab tso rau ntawm lub dav hlau focal rau kev ntsuas qhov muaj zog ntawm txhua qhov wavelength duab taw tes. Cov khoom siv ntes teeb tuaj yeem yog CCD array lossis lwm hom khoom siv ntes teeb.
Cov spectrometers feem ntau siv hauv cov chaw soj nstuam loj yog CT cov qauv, thiab cov chav kawm ntawm cov spectrometers no kuj hu ua monochromators, uas feem ntau muab faib ua ob pawg:
1, qhov sib npaug ntawm cov qauv CT scanning off-axis, cov qauv no yog txoj kev kho qhov muag sab hauv yog sib npaug kiag li, lub log grating tower tsuas muaj ib lub axis nruab nrab xwb. Vim yog qhov sib npaug tag nrho, yuav muaj qhov sib txawv theem ob, ua rau muaj lub teeb tsis pom kev zoo heev, thiab vim tias nws yog kev scan off-axis, qhov tseeb yuav raug txo qis.
2, cov qauv CT scanning asymmetric axial, uas yog, txoj kev kho qhov muag sab hauv tsis sib xws kiag li, lub log grating muaj ob lub axis nruab nrab, kom ntseeg tau tias qhov kev sib hloov ntawm grating raug luam theej duab hauv lub axis, ua kom lub teeb tsis pom kev zoo, txhim kho qhov tseeb. Kev tsim qauv ntawm cov qauv CT scanning asymmetric in-axis muaj peb lub ntsiab lus tseem ceeb: kev ua kom zoo dua cov duab zoo, tshem tawm lub teeb diffracted theem ob, thiab ua kom lub teeb ci ntsa iab siab tshaj plaws.
Nws cov khoom tseem ceeb yog: A. qhov xwm txheejlub teeb ciB. Qhov nkag C. daim iav sib txuas D. daim grating E. daim iav tsom F. Qhov tawm (qhov)G.lub tshuab ntes duab
Spectroscope (Spectroscope) yog ib yam khoom siv tshawb fawb uas siv los rhuav tshem cov teeb pom kev zoo sib xws ua cov kab spectral, uas muaj cov prisms lossis diffraction gratings, thiab lwm yam, siv lub spectrometer los ntsuas lub teeb uas cuam tshuam los ntawm qhov chaw ntawm ib yam khoom. Lub teeb xya xim hauv lub hnub yog ib feem ntawm lub qhov muag liab qab tuaj yeem faib ua ob (lub teeb pom kev), tab sis yog tias lub spectrometer yuav rhuav tshem lub hnub, raws li qhov kev teeb tsa wavelength, lub teeb pom kev tsuas yog suav rau ib qho me me ntawm cov spectrum, cov seem yog lub 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 teeb los ntawm lub spectrometer, kev tsim cov phaj duab, lossis kev tso saib cov cuab yeej suav lej hauv computer, kom pom cov ntsiab lus twg muaj nyob hauv cov khoom. Cov thev naus laus zis no siv dav hauv kev tshawb nrhiav cov pa phem, dej qias neeg, kev huv huv zaub mov, kev lag luam hlau thiab lwm yam.