Ultraviolet (UV) lub teeb yog dav siv nyob rau hauv ntau yam kev siv, los ntawm forensic kev tshawb fawb thiab kev tshawb nrhiav cuav rau industrial curing thiab fluorescence tsom xam. Ob hom UV wavelengths yog365nm uathiab395nm ua, uas tej zaum yuav zoo sib xws tab sis muaj qhov sib txawv ntawm kev ua tau zoo thiab kev siv.
1. Wavelength thiab pom kev
365nm (UVA):
Los ze rau qhov qis kawg ntawm UVA spectrum (315-400nm).
Emits pom lub teeb me ntsis, tshwm yuav luag "tsis pom" rau tib neeg lub qhov muag.
Ua kom pom lub ntsej muag ci ntsa iab tab sis feem ntau yog UV.
395nm (Nyob ze-UVA):
Ntawm qhov kawg siab dua ntawm UVA ntau yam, ciam teb rau pom lub teeb violet (~ 400nm).
Emits ib tug pom liab liab glow, ua rau nws zoo li ci ntsa iab.
Ntau pom rau tib neeg lub qhov muag piv rau 365nm.
2. Cov teebmeem fluorescence
365nm ua:
Txaus siab rau ntau yam khoom siv fluorescent zoo dua.
Zoo dua rau kev txheeb xyuas cov yam ntxwv ntawm kev ruaj ntseg (xws li, ntawv nyiaj, ntawv hla tebchaws), cov kab mob lom (xws li, cov zis tso zis), thiab qee yam minerals.
Ua kom muaj zog fluorescence nrog tsawg pom teeb pom kev cuam tshuam.
395nm ua:
Tseem excites ntau cov ntaub ntawv fluorescent tab sis tsawg dua li 365nm.
Qee cov ntaub ntawv yuav tsis fluoresce li ci ntsa iab hauv qab 395nm.
Zoo dua rau kev siv dav dav - lub hom phiaj UV tshuaj xyuas qhov twg lub teeb ci dua.
3. Kev txiav txim siab txog kev nyab xeeb
Ob lub wavelengths yog nyob rau hauvUVA ntau, txhais tau tias lawvtsis yog -ionizingthiab feem ntau muaj kev nyab xeeb dua li UVB / UVC.
Txawm li cas los xij, kev raug ncua ntev tseem tuaj yeem ua mob rau qhov muag thiab tawv nqaij.
365nm uankag mus tob me ntsis rau hauv daim tawv nqaij thiab tej zaum yuav ua rau muaj kev pheej hmoo siab dua nrog kev raug ncua ntev.
4. Kev siv ntau
| Daim ntawv thov | 365nm ua | 395nm ua |
|---|---|---|
| Forensics | Zoo dua rau kev kuaj xyuas lub cev, cov ntiv tes | Tsawg zog rau cov fluorescence tsis muaj zog |
| Kev txheeb xyuas cuav | Ua haujlwm zoo rau kev ruaj ntseg nta | Tej zaum yuav plam qee qhov UV-reactive inks |
| UV kho | Siv rau tshwj xeeb adhesives & coatings | Ntau dua nyob rau hauv dav dav UV kho |
| Mineralogy | Muaj zog fluorescence hauv cov zaub mov | Tsis muaj zog teb nyob rau hauv ib co qauv |
| Kev lom zem (Glow Effects) | Tsim cov tshuaj tiv thaiv UV zoo dua | Lub teeb xiav xiav rau cov tog neeg dub |
Xaus
Thaum365nm uayog qhov zoo dua rau kev tshawb fawb thiab forensic daim ntawv thov vim nws qhov zoo tshaj plaws fluorescence excitation,395nm uayog tus neeg siv ntau dua - tus phooj ywg rau lub hom phiaj dav dav qhov pom kev tseem ceeb. Qhov kev xaiv nyob ntawm qhov xav tau tshwj xeeb -precision (365nm) lossis pom thiab nqi (395nm).
