Lub teeb ultraviolet tshwm sim ntawm qhov pom thiab x-ray spectrums. Ultraviolet wavelength ntau yog teev raws li 10 nm txog 400 nm; Txawm li cas los xij, ntau lub tuam txhab optoelectronic kuj xav txog wavelengths siab li 430nm kom nyob rau hauv UV ntau. Lub teeb ultraviolet tau txais nws lub npe vim yog xim "violet" nws tsim nyob rau hauv qhov pom ntawm cov spectrum txawm hais tias ntau ntawm cov zis ntawm UV teeb tsis pom rau tib neeg lub qhov muag.
Xim spectrum highlighting UV-A, UV-B, thiab UV-C
UV LEDs tau pom kev loj hlob zoo heev nyob rau ntau xyoo dhau los. Qhov no tsis yog tsuas yog qhov tshwm sim ntawm kev nce qib hauv kev tsim cov khoom siv hauv lub xeev UV, tab sis qhov kev xav tau ntau ntxiv rau kev ua tus phooj ywg ib puag ncig ntawm kev tsim cov teeb ci UV uas tam sim no tseem ceeb los ntawm mercury teeb. Tam sim no muab UV LEDs hauv kev lag luam optoelectronics muaj cov khoom lag luam xws li kwv yees li 265nm - 420nm nrog ntau hom pob xws li los ntawm-qhov, nto mount thiab COB (Chip-On-Board). Muaj ntau daim ntawv thov tshwj xeeb rau UV LED emitters; Txawm li cas los xij, txhua qhov yog nyob ntawm wavelength thiab cov zis tawm zog heev. Feem ntau, UV teeb rau LEDs tuaj yeem tawg ua 3 qhov chaw dav dav. Cov no suav nrog UV-A, UV-B thiab UV-C. (Saib daim duab hauv qab no)
Kev siv Cov khoom siv "sab sauv" UVA tau muaj txij li xyoo 1990s. Cov LEDs no tau ib txwm siv rau hauv cov ntawv thov xws li kev tshawb nrhiav cuav lossis kev siv tau (Ntawm, Daim Ntawv Tso Cai Tsav Tsheb, Cov Ntaub Ntawv thiab lwm yam) thiab Forensics (Kev Tshawb Fawb Kev Ua Phem Txhaum Cai) rau npe ob peb. Lub zog tso zis yuav tsum muaj rau cov ntawv thov no tsawg heev thiab qhov tseeb wavelengths siv nyob rau hauv 390nm - 420nm ntau. Tsawg wavelengths tsis muaj nyob rau lub sijhawm ntawd rau kev siv ntau lawm. Raws li qhov tshwm sim ntawm lawv lub neej ntev nyob rau hauv kev ua lag luam thiab qhov yooj yim ntawm kev tsim, cov LEDs no tau yooj yim muaj los ntawm ntau qhov chaw thiab tus nqi qis tshaj ntawm tag nrho cov khoom UV. Qhov "middle" UVA LED cheeb tsam tau pom kev loj hlob zoo tshaj plaws nyob rau ntau xyoo dhau los. Feem ntau ntawm daim ntawv thov nyob rau hauv no wavelength ntau yam (kwv yees li 350nm - 390nm) yog rau UV kho ntawm ob qho tib si coj mus muag thiab industrial cov ntaub ntawv xws li nplaum, coatings thiab inks. LEDs muab cov txiaj ntsig tseem ceeb ntawm kev kho ib txwm siv thev naus laus zis xws li mercury lossis fluorescent vim muaj kev ua tau zoo dua qub, tus nqi qis dua ntawm cov tswv cuab thiab qhov system miniaturization. Qhov sib txawv ntawm kev siv LEDs rau kev kho yog nce raws li cov saw hlau txuas txuas ntxiv mus rau kev siv tshuab LED. Txawm hais tias tus nqi ntawm qhov kev sib tw wavelength no muaj ntau dua li thaj tsam ntawm UVA sab saud, kev nce qib sai hauv kev tsim khoom nrog rau kev nce ntim tsis tu ncua ua rau tus nqi qis. Qhov "qis" UVA thiab "sab sauv" UVB ntau yam (kwv yees li 300nm - 350nm) yog cov lus qhia tsis ntev los no rau lub khw muag khoom. Cov cuab yeej no muaj peev xwm siv tau rau ntau yam kev siv xws li UV kho, biomedical, DNA tsom xam thiab ntau hom kev hnov. Muaj qhov sib tshooj tseem ceeb hauv tag nrho 3 ntawm UV spectral ntau yam; Yog li ntawd, ib tug yuav tsum xav txog tsis tsuas yog dab tsi yog qhov zoo tshaj plaws rau daim ntawv thov, tab sis kuj yog dab tsi yog qhov zoo tshaj plaws kev daws teeb meem, txij li thaum lub qis nyob rau hauv wavelength, feem ntau yog siab dua tus nqi LED. Qhov "qis" UVB thiab "saum" UVC ranges (kwv yees li 250nm - 300nm) yog thaj chaw uas tseem muaj ntau heev nyob rau hauv nws cov me nyuam mos, txawm li cas los xij, muaj kev txaus siab thiab xav tau rau cov khoom no hauv huab cua thiab dej huv. Tam sim no tsuas muaj ib tug puv tes ntawm tuam txhab uas muag uas muaj peev xwm tsim UV LEDs nyob rau hauv no wavelength ntau yam thiab txawm ib tug me me npaum li cas ntawm cov khoom uas muaj txaus lub neej, kev ntseeg tau thiab kev ua tau zoo yam ntxwv. Yog li ntawd, cov nqi ntawm cov khoom siv nyob rau hauv UVC / B ntau yog tseem siab heev thiab tuaj yeem raug nqi txwv rau qee qhov kev siv. Kev taw qhia txog kev lag luam thawj zaug UVC LED raws li kev tua kab mob hauv xyoo 2012 tau pab txav kev lag luam mus rau qhov twg ntau lub tuam txhab tam sim no mob siab rau cov khoom siv LED. Kev ceev faj Ib lo lus nug ntau txog ultraviolet LEDs yog: Lawv puas ua rau muaj kev nyab xeeb? Raws li tau piav saum toj no, muaj ntau theem ntawm UV teeb. Ib qho ntawm feem ntau siv thiab paub qhov chaw tsim tawm UV yog "dub lub teeb". Cov khoom no tau siv ntau caum xyoo los tsim lub ci ntsa iab lossis fluorescence cuam tshuam rau qee hom ntawv tshaj tawm nrog rau lwm yam kev siv xws li kev lees paub cov duab kos duab thiab txiaj. Lub teeb raug tsim los ntawm Kev Nkag Siab Ultraviolet LED Daim Ntawv Thov thiab Kev Ceeb Toom
Cov qij no feem ntau yog nyob rau hauv "sab sauv" UVA spectrum uas nyob ze tshaj plaws nyob rau hauv wavelength mus rau qhov pom ntau yam nrog lub zog qis. Qhov no ntawm UVA spectrum yog qhov nyab xeeb tshaj plaws ntawm peb qhov ntau yam ntawm UV teeb, txawm hais tias muaj kev cuam tshuam loj heev tau txuas rau cov qog nqaij hlav tawv nqaij hauv tib neeg nrog rau lwm yam teeb meem xws li kev ua kom tawv nqaij tawv. LEDs (raws li tsis yog cov qauv incandescent los yog fluorescent hom qhov muag teev) kuj yog cov kev taw qhia zoo nrog rau qhov pom nqaim heev. Saib ncaj qha rau hauv UV LED tuaj yeem tsim teeb meem rau lub qhov muag. Nws yog qhov zoo tshaj plaws los txwv qhov raug UVA tsim cov khoom. UVC thiab ntau ntawm UVB spectrums ntawm lub teeb yog feem ntau yog siv rau kev tua kab mob thiab ua kom tsis muaj menyuam. Lub teeb uas tsim los ntawm cov wavelengths no tsis yog tsuas yog tsim kev puas tsuaj rau cov kab mob me me xwb, tab sis kuj yog qhov txaus ntshai rau tib neeg thiab lwm yam kev ua neej uas tuaj yeem cuam tshuam nrog nws. Cov teeb ci LED no yuav tsum muaj kev tiv thaiv ib txwm thiab tsis tuaj yeem pom ntawm qhov muag liab qab txawm tias nws yuav tshwm sim tias me me lossis tsis muaj lub teeb tawm ntawm lub cuab yeej. Kev cuam tshuam rau cov wavelengths no yuav ua rau mob qog noj ntshav ntawm daim tawv nqaij thiab ib ntus lossis tsis pom kev mus tas li. Tag nrho cov khoom siv UV yuav tsum muaj cov ntawv ceeb toom zoo ib yam li daim ntawv qhia hauv qab no (muab los ntawm Marktech Optoelectronics). Tsis tas li ntawd, ua ntej yuav yuav UVC lossis UVB LED, ntau lub tuam txhab xav kom txhua tus neeg siv khoom kos npe rau daim ntawv qhia tias lawv nkag siab thiab pom zoo rau kev ceev faj txog kev siv thiab tuav cov khoom no.
Daim duab 3, Schematic ntawm Standard LED.
Los ntawm Vincent C. Forte - Lub Ib Hlis 2014 Vincent yog Tus Thawj Saib Xyuas Kev Lag Luam ntawm Marktech Optoelectronics hauv Latham, New York. Nws tau nyob rau hauv optoelectronics teb rau ze li 30 xyoo thiab tau sau los yog co-sau ob peb tsab xov xwm hais txog LED technology. Ntau qhov kev txhim kho tseem ceeb rau LEDs thiab lawv cov ntawv thov tau ncaj qha los ntawm Vincent cov tswv yim thiab kev ua haujlwm ntawm tes
