Hom iav UV-Filter rau kev tiv thaiv kev noj qab haus huv ntawm qhov muag
Kev raug tshav ntuj ultraviolet (UV) los ntawm lub hnub tsis yog tsuas yog cuam tshuam tsis zoo rau peb daim tawv nqaij xwb tab sis kuj cuam tshuam rau peb lub qhov muag thiab. Kev raug tshav ntuj UV ntev thiab ntau dhau tuaj yeem ua rau ntau qhov ntawm lub qhov muag puas tsuaj, suav nrog lub cornea, lens, thiab retina. Ntxiv mus, tshav ntuj UV tau txuas nrog kev pheej hmoo ntawm cataracts, macular degeneration, thiab ntau yam teeb meem kev noj qab haus huv ntawm lub qhov muag. Yog li ntawd, kev siv cov tsom iav UV-filtered tau dhau los ua qhov tseem ceeb hauv kev tswj kev noj qab haus huv ntawm lub qhov muag. Hauv tsab xov xwm no, peb yuav tham txog cov hom tsom iav UV-filtered uas tuaj yeem siv los tiv thaiv lub qhov muag ntawm kev phom sij ntawm UV rays.
Kev Taw Qhia Txog Cov Hluav Taws Xob UV thiab Lawv Qhov Cuam Tshuam Rau Lub Qhov Muag
Cov teeb UV muaj peb hom raws li lawv qhov wavelength: UVA, UVB, thiab UVC. UVC muaj qhov wavelength luv tshaj plaws thiab txaus ntshai tshaj plaws, tab sis nws yuav luag raug nqus los ntawm huab cua ntawm lub ntiaj teb thiab yog li ntawd nws tsis ncav cuag saum npoo av. UVA thiab UVB, ntawm qhov tod tes, ncav cuag saum npoo av thiab tuaj yeem ua rau lub qhov muag thiab daim tawv nqaij puas tsuaj.
– UVA: Muaj qhov ntev ntawm 320-400 nm. Txawm hais tias tsis muaj zog npaum li UVB, UVA tuaj yeem nkag mus rau hauv daim tawv nqaij thiab qhov muag tob dua, ua rau muaj kev puas tsuaj mus sij hawm ntev xws li kev laus ntawm daim tawv nqaij thiab kev puas tsuaj rau lub qhov muag.
– UVB: Muaj qhov ntev ntawm 290-320 nm. Nws muaj zog dua UVA thiab yog lub luag haujlwm rau cov mob xws li kub hnyiab. Hauv qhov muag, UVB tuaj yeem ua rau mob cataracts thiab puas tsuaj mus tas li rau lub retina.
Qhov Tseem Ceeb ntawm UV-Filters hauv Cov Tsom Iav
Cov tsom iav lossis cov iav uas muaj cov lim dej UV yog tsim los kom nqus lossis cuam tshuam cov duab UV kom lawv tsis txhob ncav cuag lub qhov muag. Tsis yog txhua lub tsom iav muaj qhov no, yog li nws tseem ceeb heev uas yuav tsum xaiv cov tsom iav uas tiv thaiv koj lub qhov muag ntawm cov duab UV tiag tiag.
Cov hauv qab no yog ntau hom iav UV-lim uas tuaj yeem pom muaj nyob rau hauv kev ua lag luam:
1. Polycarbonate Iav
Polycarbonate yog ib yam khoom yas uas muaj zog thiab tiv taus kev cuam tshuam uas kuj muaj peev xwm nqus tau cov duab UV. Qhov no ua rau polycarbonate yog qhov kev xaiv nrov rau cov tsom iav uas lim tau UV. Polycarbonate iav tsis yog tsuas yog muaj kev tiv thaiv UV siab xwb tab sis kuj tseem sib dua thiab ruaj khov. Ntxiv mus, polycarbonate feem ntau siv rau hauv cov tsom iav kis las thiab cov tsom iav menyuam yaus vim nws tiv taus kev cuam tshuam.
2. CR-39 iav
CR-39 yog lwm yam khoom yas uas siv dav hauv kev tsim cov tsom iav qhov muag. Txawm hais tias tsis muaj zog npaum li polycarbonate, cov tsom iav CR-39 muab kev pom tseeb zoo dua. Cov tsom iav no kuj tseem tuaj yeem tsim nrog cov txheej ntxiv los txhim kho kev tiv thaiv UV. CR-39 feem ntau muab kev tiv thaiv UV txog li 95%, thiab ntxiv cov txheej tiv thaiv kev cuam tshuam tuaj yeem txhim kho qhov peev xwm no ntxiv.
3. Iav nrog Anti-Reflective (AR) Txheej
Cov txheej tiv thaiv kev cuam tshuam feem ntau yog siv rau ntawm cov iav kom txo qhov kev cuam tshuam ntawm lub teeb thiab txhim kho qhov pom kev meej. Qee cov txheej AR suav nrog cov lim dej UV ntxiv uas nqus lub teeb UV. Kev sib xyaw ua ke no tsis yog tsuas yog txhim kho qhov xis nyob ntawm qhov muag xwb tab sis kuj tiv thaiv lub qhov muag los ntawm kev puas tsuaj los ntawm UV.
4. Iav Hloov (Photochromic)
Cov iav hloov pauv yog ib hom iav uas hloov xim thaum raug lub teeb UV. Cov iav no feem ntau pom tseeb hauv tsev thiab tsaus ntuj thaum raug tshav ntuj ncaj qha. Cov iav hloov pauv muab kev tiv thaiv UV tsis siv neeg thiab siv tau zoo heev rau cov neeg uas siv sijhawm ntau hauv tsev thiab sab nraum zoov. Txawm hais tias kim dua, cov iav hloov pauv muab kev nplij siab thiab kev tiv thaiv zoo heev.
5. Iav Polarized
Cov tsom iav polarized feem ntau siv los txo qhov kaj uas los ntawm lub teeb ci ntsa iab rau ntawm cov chaw xws li dej, txoj kev, lossis daus. Txawm hais tias lub luag haujlwm tseem ceeb ntawm cov tsom iav polarized yog txo qhov kaj, ntau lub lens polarized kuj muaj cov txheej lim UV. Qhov no ua rau lawv zoo tagnrho rau kev siv sab nraum zoov, xws li tsav tsheb lossis ua si hauv dej.
6. Qeb 3 thiab 4 Iav (Qeb Xim)
Cov iav uas muaj xim yog cov iav uas tau muab xim kom txo qhov kaj uas nkag los. Cov iav qeb 3 thiab 4 muaj kev tiv thaiv UV ntau heev. Cov iav no raug pom zoo kom siv rau hauv cov chaw uas muaj lub teeb ci ntau heev, xws li roob lossis ntug hiav txwv. Txawm hais tias tsis zoo rau kev siv txhua hnub, cov iav no zoo heev rau kev tiv thaiv lub qhov muag ntawm kev puas tsuaj los ntawm UV.
Yuav Ua Li Cas Xaiv Lub Iav UV-Filter Zoo
Kev xaiv lub iav UV-lim kom raug yuav tsum xav txog ntau yam:
1. Cov Haujlwm thiab Cov Kev Xav Tau ntawm Tus Neeg Siv: Xav txog koj cov haujlwm txhua hnub. Yog tias koj siv sijhawm sab nraum zoov ntau zaus, kev xaiv cov tsom iav polarized lossis cov tsom iav hloov pauv yuav yog qhov kev xaiv zoo. Rau kev ua kis las, cov tsom iav polycarbonate uas tiv taus kev cuam tshuam yuav tsim nyog dua.
2. Kev Xis Nyob thiab Zam: Xyuas kom tseeb tias cov tsom iav uas koj xaiv xis nyob thiab haum koj tus qauv. Xaiv cov thav duab uas tsis hnyav thiab haum koj lub ntsej muag kom xis nyob tshaj plaws.
3. Kev Tiv Thaiv UV Siab Tshaj Plaws: Saib daim ntawv lo rau ntawm koj lub tsom iav kom paub tseeb tias lawv tiv thaiv tau 100%. Cov tsom iav uas muaj daim ntawv lo "UV400" txhais tau tias cov tsom iav thaiv tau cov teeb UV txog li ntawm 400 nm, thiab tiv thaiv tau tag nrho ob qho tib si UVA thiab UVB.
4. Qhov Zoo ntawm lub lens: Qhov zoo ntawm lub lens kuj tseem ceeb heev. Xaiv cov lens los ntawm cov chaw tsim khoom uas ntseeg tau kom ntseeg tau tias qhov zoo thiab tiv thaiv tau UV tiag tiag.
5. Kev Siv Tau Yooj Yim: Xav txog seb koj yuav siv cov tsom iav li cas. Cov tsom iav hloov pauv yuav zoo tagnrho yog tias koj feem ntau hloov ntawm sab hauv tsev thiab sab nraum zoov, thaum cov tsom iav Qeb 4 yuav zoo dua rau cov dej num tshwj xeeb xws li kev taug kev.
Xaus
Kev tiv thaiv koj ob lub qhov muag ntawm cov hluav taws xob UV yog ib kauj ruam tseem ceeb hauv kev tswj hwm kev noj qab haus huv ntawm lub qhov muag mus sij hawm ntev. Nrog rau ntau yam tsom iav lim UV hauv khw, koj muaj kev ywj pheej xaiv cov uas haum rau koj cov kev xav tau, kev nplij siab, thiab kev ua neej zoo tshaj plaws. Pib los ntawm kev nkag siab txog ntau hom tsom iav lim UV, xws li polycarbonate, CR-39, tiv thaiv kev cuam tshuam, hloov pauv, polarized, thiab qeb 3 thiab 4 tsom iav. Nrog cov ntaub ntawv no, koj tuaj yeem txiav txim siab zoo dua thiab tiv thaiv koj ob lub qhov muag ntawm kev puas tsuaj los ntawm UV. Kev tiv thaiv kom zoo yuav tsis tsuas yog txhim kho koj lub neej zoo xwb tab sis kuj tiv thaiv ntau yam teeb meem kev noj qab haus huv ntawm qhov muag yav tom ntej.
