NIR spectrum originates los ntawm hluav taws xob xa mus rau lub zog siv hluav taws xob cuam tshuam nrog kev txav ntawm atoms tuav ua ke los ntawm cov tshuaj sib txuas hauv cov molecule.
NIR hluav taws xob yog dab tsi?
NIR yog cov lus luv rau Nyob ze InfraRed spectroscopy, thiab nws yog hais txog cov txheej txheem tshuaj xyuas ntawm kev siv hluav taws xob ze-infrared los tshuaj xyuas cov qauv rau cov khoom sib xyaw lossis cov yam ntxwv. NIR kuj tau siv los piav txog Ze-Infrared Reflectance.
Dab tsi yog qhov chaw ntawm hluav taws xob hauv IR spectroscopy?
Infrared qhov chaw muaj ib qho khoom inert uas yog hluav taws xob rhuab mus rau qhov kub ntawm 1, 500 thiab 2, 200 K. Cov khoom rhuab yuav ces emit infrared tawg. Lub Nernst glower yog tsim los ntawm tsawg lub ntiaj teb oxides nyob rau hauv daim ntawv ntawm ib tug hollow cylinder.
Qhov twg siv rau thaj tsam deb infrared?
Qhov kub silicon carbide qhov chaw siv hauv kev lag luam infrared spectrometers, feem ntau hu ua "glow bar," yog txwv rau wavelengths luv dua 100 µm los ntawm λ −2 dependence ntawm kev siv ntawm lub teeb, raws li tau zoo raws li qhov tseeb hais tias nws emissivity poob ntawm ntev wavelengths, txo qhov kev siv tseem ntxiv.
Dab tsi yog qhov tsis zoo ntawm cov hluav taws xob infrared?
Ntev ntev raug rau IR hluav taws xob ua rau maj mam tab sis hloov tsis tau ntawm lub lens. Lwm yam kev puas tsuaj rau lub qhov muaglos ntawm IR raug suav nrog scotoma, uas yog qhov tsis pom kev vim kev puas tsuaj rau lub retina. Txawm tias qis qis IR nqus tuaj yeem ua rau cov tsos mob xws li redness ntawm qhov muag, o, lossis hemorrhaging.
