Dab tsi yog yam uas cuam tshuam rau emissivity ntawm infrared tus pas ntsuas kub
Txhua yam khoom ntawm -273 degree yuav emit infrared nthwv dej. Raws li lub tshuab hluav taws xob zoo tshaj plaws, lub cev dub tuaj yeem nqus cov hluav taws xob hluav taws xob ntawm txhua qhov wavelengths. Cov ntsuas kub infrared tsis muaj lub zog cuam tshuam thiab xa mus, thiab lawv qhov emissivity saum npoo yog 1.00. Keeb kwm, tsis muaj lub cev dub tiag tiag hauv qhov xwm txheej, tab sis txhawm rau nkag siab thiab tau txais txoj cai ntawm kev faib hluav taws xob infrared, nws yog ib qho tsim nyog yuav tsum xaiv tus qauv tsim nyog rau infrared thermometers hauv kev tshawb fawb theoretical, uas yog lub cev kab noj hniav hluav taws xob tawm tswv yim los ntawm infrared. Tus pas ntsuas kub Planck Quantize tus qauv oscillator, thiab tom qab ntawd muab txoj cai ntawm Planck lub cev hluav taws xob dub. Tus pas ntsuas kub infrared yog lub cev dub spectral radiance qhia los ntawm wavelength. Qhov no yog qhov pib ntawm tag nrho infrared radiation theories, yog li nws yog hu ua txoj cai dub lub cev hluav taws xob.
Kev cuam tshuam ntawm tus pas ntsuas kub infrared khoom emissivity ntawm hluav taws xob ntsuas kub: Cov khoom tiag tiag uas muaj nyob hauv qhov xwm txheej infrared yuav luag tsis yog lub cev dub. Tus nqi hluav taws xob ntawm tag nrho cov khoom tiag tiag nyob ntawm tsis yog tsuas yog nyob ntawm qhov hluav taws xob wavelength thiab qhov kub ntawm cov khoom, tab sis kuj yog nyob ntawm hom khoom tsim los ntawm cov khoom, cov txheej txheem kev npaj, cov txheej txheem thermal ntawm lub ntsuas kub infrared, thiab qhov chaw thiab ib puag ncig. . Yog li ntawd, txhawm rau ua kom txoj cai ntawm lub cev dub hluav taws xob siv tau rau txhua yam khoom siv tiag tiag, tus ntsuas kub infrared yuav tsum ua kom pom qhov sib npaug ntawm cov khoom siv thiab qhov chaw saum npoo, uas yog, emissivity. Qhov coefficient no qhia tau hais tias ze li cas cov hluav taws xob hluav taws xob ntawm qhov khoom tiag tiag yog rau cov hluav taws xob lub cev dub, thiab nws cov nqi yog nyob nruab nrab ntawm xoom thiab tus nqi tsawg dua 1. Raws li txoj cai hluav taws xob ntawm infrared Planck dub lub cev hluav taws xob, tsuav yog qhov emissivity ntawm cov khoom paub, cov yam ntxwv ntawm infrared tawg ntawm txhua yam khoom tuaj yeem paub.
Infrared radiation infrared tus pas ntsuas kub ntsuas qhov ntsuas kub ntawm lub hom phiaj ua ntej ntsuas qhov hluav taws xob infrared ntawm lub hom phiaj nyob rau hauv nws cov qhab ntau, thiab tom qab ntawd xam qhov ntsuas kub ntawm lub hom phiaj ntsuas los ntawm tus ntsuas kub infrared. Tus pas ntsuas kub ib leeg-xim infrared yog proportional rau cov hluav taws xob hauv cov qhab; ob-xim infrared tus pas ntsuas kub yog proportional rau qhov piv ntawm cov hluav taws xob nyob rau hauv ob pawg.
