Txawm tias ob leegLED UVthiab hnub ci UV raug cais raws li lub teeb ci ultraviolet, lawv txawv ntawm ntau txoj hauv kev, xws li lawv tsim, lawv cov khoom, lawv siv, thiab lawv cuam tshuam li cas rau cov khoom muaj sia.
Mechanism ntawm tiam
Lub hnub ci UV yog ib qho tshwm sim los ntawm cov khoom siv hluav taws xob ntawm lub hnub lub nuclear fusion txheej xwm. Hydrogen atoms fuse rau hauv helium ntawm lub hnub tseem ceeb vim huab cua kub thiab siab, tso tawm ntau lub zog hauv daim ntawv ntawm hluav taws xob hluav taws xob, nrog rau lub teeb ultraviolet. Thaum cov hluav taws xob no nce mus txog lub ntiaj teb los ntawm qhov chaw, nws dhau los ntawm huab cua, qhov twg qee qhov nws tau tawg los yog nqus.
Conversely, LED UV yog tsim artificially. Electroluminescence yog lub hauv paus rau yuav ua li cas LED (lub teeb-emitting diode) UV teeb ua haujlwm. LED cov khoom siv semiconductor tso tawm lub zog nyob rau hauv daim ntawv ntawm photons thaum electrons recombine nrog electron qhov thaum muaj hluav taws xob tam sim no ntws thoob plaws nws. LEDs tuaj yeem ua rau emit UV teeb los ntawm kev ua tib zoo xaiv cov khoom siv semiconductor thiab lawv cov pleev.
Cov yam ntxwv ntawm Spectra
UVA (320–400 nm), UVB (280–320 nm), thiab UVC (100–280 nm) yog peb hom tseem ceeb ntawm qhov dav dav uas ua rau lub hnub ci tiv thaiv UV. Thaum UVC yuav luag tag nrho nqus los ntawm lub ntiaj teb ozone txheej, UVA ua rau feem ntau ntawm lub hnub ci mus txog lub ntiaj teb saum npoo, ua raws li UVB.
Hauv qhov sib txawv, nws muaj peev xwm tsim tauLED UVkom emit heev tshwj xeeb UV wavelengths. Piv txwv li, qee qhov LED UV qhov chaw yog tsim los tsim lub teeb UVA ntawm ib lub wavelengths, xws li 395 nm lossis 365 nm. Tsis zoo li qhov dav -spectrum UV los ntawm lub hnub, qhov nqaim no -band emission ua rau muaj kev tswj xyuas ntau dua li cas UV teeb cuam tshuam nrog cov khoom lossis cov qauv lom neeg.
Kev ruaj ntseg thiab kev siv zog
Huab cua, latitude, caij, thiab lub sij hawm ntawm ib hnub tag nrho muaj kev cuam tshuam loj npaum li cas ntawm UV rays ntawm tshav ntuj. Nyob rau hnub ntshiab nyob ze ntawm txoj kab nruab nrab, qhov kev siv UV tuaj yeem siab heev thaum tav su, tab sis nyob rau hnub huab lossis hmo ntuj, nws tuaj yeem poob mus rau zero. Nws yog ib qho nyuaj rau nyob ntawm lub hnub ci UV rau cov ntawv siv txhim khu kev qha vim qhov kev hloov pauv no.
Qhov kev siv ntawm LED UV qhov chaw nyob deb npaum li cas thiab tswj tau. Nrog rau kev siv cov tsav tsheb hauv hluav taws xob, lawv tuaj yeem hloov kho rau qee qhov kev tso tawm, thiab ib zaug tsim, lawv qhov kev siv zog tseem zoo ib yam nyob rau lub sijhawm. Rau kev siv xws li UV curing hauv kev lag luam kev lag luam, qhov twg cov koob tshuaj UV ruaj khov yog tsim nyog rau cov khoom tsim nyog sib txuas lossis tawv, qhov kev ruaj ntseg no yog qhov tseem ceeb.
Siv
UV hluav taws xob los ntawm tshav ntuj muaj ntau yam ntawm ib puag ncig thiab ntuj tsim. Thaum siv me me rau ntawm daim tawv nqaij, nws yog ib qho tsim nyog rau tib neeg thiab tsiaj txhu los tsim cov vitamin D. Ntawm qhov tod tes, kev raug mob ntev tuaj yeem ua rau tshav kub kub, tawv nqaij puas tsuaj, thiab muaj feem ntau ntawm kev mob qog noj ntshav ntawm daim tawv nqaij. Nyob rau hauv qhov xwm txheej, ultraviolet hluav taws xob los ntawm lub hnub kuj tseem ua rau kev puas tsuaj ntawm cov ntaub ntawv organic thiab kev tswj hwm ntawm qee cov txheej txheem ecological.
Muaj ntau yam kev tshawb fawb, kev lag luam, thiab kev kho mob siv rau LED UV. LED UV yog siv los kho inks, adhesives, thiab coatings nyob rau hauv printing thiab txheej industries. Zoo dua- ua tiav zoo thiab lub sijhawm kho sai dua yog ua tau los ntawm kev tswj xyuas qhov tseeb ntawm wavelength thiab kev siv zog. Vim tias cov wavelengths tshwj xeeb tuaj yeem rhuav tshem cov kab mob, kab mob, thiab cov fungi, LED UV tuaj yeem siv rau kev tua kab mob hauv thaj chaw kho mob. Nws kuj tseem raug tshuaj xyuas rau kev siv tshuaj kho mob, xws li kev kho mob ntawm daim tawv nqaij, qhov twg UV wavelength tshwj xeeb tuaj yeem ua rau lub hlwb cuam tshuam yam tsis muaj mob hnyav nyob ze cov ntaub so ntswg.
Cov txiaj ntsig rau Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv
Ib qho ntawm cov teeb meem tseem ceeb rau kev laus ntawm daim tawv nqaij thiab mob qog noj ntshav yog raug UV hluav taws xob los ntawm lub hnub, tshwj xeeb tshaj yog UVB thiab UVA ntau dhau. Lub sijhawm ntev - raug cuam tshuam tuaj yeem ua mob rau cov cell ntawm DNA, uas ua rau muaj kev hloov pauv thiab kev loj hlob ntawm malignancies. Nws kuj tseem yuav ua rau qhov muag pom zoo li cataracts.
Yog tsis siv kom raug,LED UVtuaj yeem ua rau muaj kev phom sij. Kev cuam tshuam ncaj qha rau siab - siv LED UV tuaj yeem ua mob rau ntawm daim tawv nqaij thiab ob lub qhov muag zoo ib yam li lub hnub ci, txawm tias tag nrho cov qib raug tuaj yeem tswj tau ntau dua. Txawm li cas los xij, kev ceev faj txog kev nyab xeeb tuaj yeem muab tso rau hauv qhov chaw kom txo cov kev pheej hmoo no tau zoo dua vim tias lub wavelength thiab kev siv zog tuaj yeem ua tib zoo tswj. Piv txwv li, cov neeg ua haujlwm nyob rau hauv ib puag ncig kev lag luam tuaj yeem tiv thaiv los ntawm kev hnav khaub ncaws thiab tsom iav uas thaiv qhov tshwj xeeb UV wavelengths uas LED qhov chaw tsim.
Hauv kev xaus, txawm tias ob lub hnub UV thiab LED UV emit ultraviolet lub teeb, lawv yog qhov zoo tshaj plaws rau kev siv sib txawv vim lawv qhov txawv ntawm cov yam ntxwv, kev siv zog, kev siv, thiab kev txhawj xeeb txog kev nyab xeeb. Kev nkag siab txog cov kev sib txawv no yog qhov tseem ceeb rau kev txhim kho lawv cov txiaj ntsig zoo thaum txo qis kev phom sij hauv ntau qhov xwm txheej.
http://www.benweilight.com/professional-lighting/uv-lighting/uv-light-black-light-for-halloween.html
