Qhov ob feem ntau wavelengths rau ultraviolet lub teeb-emitting diode teeb yog 365 thiab 395 nanometers. Txawm hais tias lawv zoo li zoo sib xws, cov wavelengths tiag tiag muaj qhov sib txawv tseem ceeb uas yuav tsum nkag siab.
1. Wavelength:
Thawj qhov sib txawv ntawm 365 nm thiab395nm UV LED teebyog qhov ntev ntawm lub teeb nthwv dej lawv tus kheej. Lub wavelength ntawm 365 nm yog luv dua li ntawm 395 nm, tso cai rau nws nkag mus rau qee yam ntaub ntawv ntau dua li qhov ntau dua wavelength.
Qhov kev sib txawv no tseem ceeb heev hauv forensics thiab lwm yam kev tshawb nrhiav haujlwm. Piv txwv li, yog tias koj xav kuaj ntshav stains ntawm daim ntaub ntxhua khaub ncaws, koj tuaj yeem siv 365 nm UV LED teeb. Qhov no yog vim qhov luv luv wavelength tuaj yeem nkag mus tob rau hauv daim ntaub, pom cov stains uas yuav tsis pom ntawm tib neeg lub qhov muag lossis nrog lub teeb 395 nm.
Txawm li cas los xij, muaj qee qhov xwm txheej uas 395 nm UV LED teeb yuav muaj txiaj ntsig zoo dua. Piv txwv li, yog tias koj siv lub teeb UV los txheeb xyuas cov nyiaj cuav lossis lwm yam kev dag ntxias, koj yuav xav tau lub teeb uas tuaj yeem ntes cov cim dej thiab lwm yam ntxwv uas tsuas pom ntawm qee qhov wavelengths ntawm lub teeb. Hauv qhov xwm txheej no, 395 nm UV LED teeb yuav ua tau zoo dua li qhov luv luv wavelength.
Lwm qhov yuav tsum tau xav txog thaum txiav txim siab ntawm 365 nm thiab 395 nm UV LED teeb yog qhov kev nyab xeeb. Thaum ob hom teeb pom kev zoo feem ntau muaj kev nyab xeeb thaum siv kom tsim nyog, lub teeb 365 nm yuav ua rau muaj kev phom sij ntau dua yog tias siv tsis raug. Qhov no yog vim qhov luv luv wavelength tuaj yeem nkag mus rau ntawm daim tawv nqaij tob dua thiab ua rau DNA puas hauv peb lub hlwb. Yog li ntawd, nws yog ib qho tseem ceeb rau kev saib xyuas kev noj qab haus huv thaum siv 365 nm UV LED teeb thiab yuav tsum hnav khaub ncaws tiv thaiv zoo (xws li hnab looj tes thiab tsom iav) thaum ua haujlwm nrog cov khoom siv no.
2. Daim ntawv thov
UV LED teeb muaj txiaj ntsig zoo rau ntau yam kev siv, suav nrog kev luam ntawv thiab kho, kev tshawb nrhiav cuav, kev tshawb nrhiav kev tshawb fawb, thiab kev lim dej, hais txog ob peb yam. Lub wavelength ntawm ultraviolet lub teeb cuam tshuam nws cov txiaj ntsig hauv ntau yam kev siv.
Lub 365 nm UV LED lub teeb muaj luv luv wavelength thiab muaj txiaj ntsig zoo hauv kev txheeb xyuas cov ntawv cuav, IDs, thiab daim npav rho nyiaj. Nws kuj tseem siv tau rau kev kho mob thiab kev tshawb fawb, suav nrog kev txheeb xyuas cov kua hauv lub cev thiab tshuaj xyuas cov ntshav stains. 365 nm UV LED teeb kuj tseem muaj txiaj ntsig zoo rau kev kho cov nplaum nplaum, txheej, thiab inks vim lawv lub zog tso zis ntau thiab luv wavelength.
Ntawm qhov tod tes, 395 nm UV LED lub teeb muaj lub teeb ntev dua thiab muaj txiaj ntsig zoo hauv kev kho UV-rhiab cov ntaub ntawv xws li inks, xim, thiab varnishes. Nws kuj tseem tuaj yeem siv los ua kom tsis muaj menyuam thiab tua cov khoom siv kho mob thiab kho hniav, nrog rau hauv cov chaw kho dej kom tshem tawm cov kab mob thiab cov kab mob phem los ntawm cov dej.
Nyob rau hauv cov nqe lus ntawm tsos, 395 nm UV LED teeb ua ib tug nplua nuj xim liab xim, thaum lub 365 nm UV LED teeb zoo li bluer. Qhov kev hloov pauv xim no yuav tsis yog qhov tseem ceeb hauv ntau daim ntawv thov, tab sis nws yuav cuam tshuam rau huab cua ntawm cov chaw tshwj xeeb, xws li cov koom haum, tuav, thiab tsev noj mov.
3. Tus nqi
UV LED teeb nrog lub zaus ntawm 365 nm thiab 395 nm yog siv rau ntau yam sib txawv thiab cov nqi sib txawv. 365 nm UV LED teeb muab tawm luv-yoj UV teeb uas siv ntau hauv kev tshawb fawb thiab kev ua txhaum cai thiab raug nqi ntau dua los ua. 395 nm UV LED teeb, ntawm qhov tod tes, muab tawm ntev-yoj UV teeb uas tau siv dav hauv ntau lub sijhawm thiab raug nqi tsawg. Tsis muaj teeb meem dab tsi ntawm UV LED teeb siv, lawv yog txoj hauv kev zoo dua los xa tawm lub teeb ultraviolet dua li cov qauv UV teeb. Qhov no yog vim li cas ntau lub lag luam xaiv lawv.
Thaum qhov sib txawv ntawm 365 nm thiab 395 nm UV LED teeb yuav zoo li me me, nws yog ib qho tseem ceeb kom nkag siab qhov wavelength twg yog qhov zoo tshaj plaws rau koj daim ntawv thov tshwj xeeb. Ob lub wavelengths muaj cov khoom tshwj xeeb uas ua rau lawv zoo tagnrho rau kev siv tshwj xeeb. Nco ntsoov ua raws li cov lus qhia txog kev nyab xeeb thaum ua haujlwm nrog UV LED teeb, vim tias lawv tuaj yeem tsim teeb meem rau lub qhov muag thiab tawv nqaij. Nrog rau kev siv kom raug thiab kev ceev faj txog kev nyab xeeb, UV LED teeb tuaj yeem yog cov cuab yeej siv tau zoo rau kev ua kom tsis muaj menyuam, tshawb nrhiav, thiab kho daim ntawv thov.
