Thaum huab cua kub, ntau tus neeg xaiv hnav tsom iav los tiv thaiv lawv lub qhov muag. Cov tsom iav tseem ceeb yog muab faib ua cov xim thiab cov polarized. Txawm hais tias nws yog cov neeg siv khoom lossis cov lag luam, cov tsom iav polarized tsis yog qhov txawv.
Kev Txhais Lus ntawm Polarization
Kev ua kom pom kev (polarization), tseem hu ua lub teeb polarized, txhais tau hais tias lub teeb pom kev yog ib nthwv dej transverse, nrog nws qhov kev co perpendicular rau qhov kev taw qhia ntawm kev nthuav dav. Qhov kev co ntawm lub teeb ntuj yog random nyob rau hauv lub dav hlau perpendicular rau qhov kev taw qhia ntawm kev nthuav dav; rau lub teeb polarized, nws qhov kev co yog txwv rau ib qho kev taw qhia tshwj xeeb ntawm ib lub sijhawm.
Kev faib tawm polarization
Kev sib hloov polarization muaj peb hom: linear polarization, elliptical polarization, thiab circular polarization. Feem ntau, qhov hu ua polarization yog hais txog linear polarization, tseem hu ua plane polarization. Qhov kev co ntawm hom nthwv dej teeb no yog kho raws li qhov kev taw qhia tshwj xeeb thiab tseem tsis hloov pauv. Nws txoj kev nthuav dav hauv qhov chaw ua raws li kab sinusoidal, thiab nws qhov kev kwv yees ntawm lub dav hlau perpendicular rau qhov kev taw qhia ntawm kev nthuav dav yog ib txoj kab ncaj.
Lub dav hlau uas tsim los ntawm kev co ntawm lub teeb linearly polarized thiab kev taw qhia ntawm kev nthuav dav hu ua lub dav hlau ntawm kev co, thiab lub dav hlau perpendicular rau kev co thiab muaj kev taw qhia ntawm kev nthuav dav hu ua lub dav hlau ntawm polarization. Kev dhau lub teeb ntuj los ntawm lub polarizer tuaj yeem tsim lub teeb linearly polarized.
Lub luag haujlwm ntawm Polarization
Hauv lub neej txhua hnub, muaj ntau lub teeb uas tsim lub teeb phem, tshwj xeeb tshaj yog lub hnub ci. Lub hnub ci tso tawm peb hom teeb: lub teeb pom kev, lub teeb infrared, thiab lub teeb ultraviolet (UV). Ntawm cov no, lub teeb ultraviolet tuaj yeem ua rau muaj kev puas tsuaj loj rau daim tawv nqaij thiab qhov muag. Lub teeb pom kev yog txij li 380 txog 780 nanometers, thaum lub teeb ultraviolet raug faib ua UVA, UVB, thiab UVC, nrog rau qhov ntev tshaj 310nm. UVA, UVB, thiab UVC yog cov teeb meem. Kev raug lub teeb no ntev ntev tuaj yeem ua rau lub cev puas tsuaj. UVB muaj kev cuam tshuam loj heev rau kev pom kev, thiab nws kuj yog "lub teeb tanning" uas ua rau daim tawv nqaij tsaus ntuj. Feem ntau ntawm cov ces kaum ntawm lub qhov muag nqus cov teeb UVB no, yog li nws yog qhov tseem ceeb kom thaiv lub teeb no.
Cov iav polarizedmuaj lub luag haujlwm ntawm lub teeb polarizing, uas tso cai rau lawv los thaiv lub teeb phem yam tsis cuam tshuam rau kev kis lub teeb pom kev, yog li tiv thaiv lub qhov muag. Ntxiv nrog rau lub luag haujlwm tseem ceeb ntawm kev tiv thaiv UV, cov iav polarized kuj muaj cov haujlwm tiv thaiv kev ci ntsa iab, kev cuam tshuam ntawm txoj kev, thiab kev ci ntsa iab ntawm dej, ua rau lawv haum rau kev tsav tsheb, nuv ntses, mus ncig, thiab hnav txhua hnub.
Kev Tsim Khoom Ntawm Cov Lens Polarized
Hauv cov lus yooj yim,cov iav polarizedRau cov neeg uas pom kev ze, muaj cov qauv zoo li sandwich (muaj ib txheej pem hauv ntej ntawm cov tsom iav dub, ib txheej nruab nrab ntawm cov fibers polarized, thiab ib txheej tom qab ntawm cov iav tsom iav uas pom kev ze, txhua txheej yog laminated ua ke). Cov khoom siv lens uas siv feem ntau muaj qhov refractive index ntawm 1.50 (kuj tseem muaj 1.60, tab sis lawv kim dua). Cov iav tsom iav tuab thiab hnyav, thiab yog tias daim ntawv yuav tshuaj tshaj 600°, ob qho tib si kev zoo nkauj thiab kev nplij siab yuav raug cuam tshuam loj heev. Tus nqi ntawm cov iav tsom iav polarized rau cov neeg uas pom kev ze yog dav heev thiab nyob ntawm tus neeg tsim khoom txoj kev ruaj khov thiab zoo.
Cov iav polarized pab tau rau kev lim tawm qee lub teeb uas tawg (xws li cov teebmeem ntawm cov ntaub thaiv qhov muag), tab sis muaj qhov sib txawv tseem ceeb hauv qhov zoo. Cov iav polarized tsis zoo yuav yooj yim tawg thiab tawg, thiab ntau yam tsis ua raws li cov qauv kho qhov muag.
Cov Khoom Siv Ntawm Cov Lens Polarized
Muaj plaub hom kev siv ntaucov iav polarizednyob rau hauv kev ua lag luam: iav iav, resin iav, PC iav, thiab TAC iav.
① Cov iav iav
Txawm hais tias lawv tsis yooj yim khawb thiab muaj kev ua haujlwm zoo ntawm qhov muag, lawv qhov hnyav thiab kev nyab xeeb tau ua rau lawv siv tsawg zuj zus.
② Cov iav resin
Lawv yooj yim rau zas xim, tsis hnyav, thiab tiv taus kev cuam tshuam, ua rau lawv yog ib qho ntawm cov khoom siv tseem ceeb rau cov tsom iav hnub qub nrov. Txawm li cas los xij, cov iav resin feem ntau yuav tawg thaum lub sijhawm ua ntug, thiab lawv tseem tuaj yeem ua rau muaj kev phom sij rau kev nyab xeeb thaum raug kev cuam tshuam loj heev.
③ TAC lens
TAC yog ib qho ntawm cov khoom siv pob tshab siab molecular. TAC lenses ua cov tsom iav hnub ci muaj cov yam ntxwv xws li acid thiab alkali tsis kam, lub teeb yuag, thiab tus nqi tsim nyog. Txawm li cas los xij, TAC lenses tsis kam hnav tsis zoo thiab tsis ruaj khov optical yam ntxwv. Txawm hais tias lawv tus nqi qis, lawv tau raug tso tseg los ntawm feem ntau ntawm cov npe nrov txawv teb chaws.
④ Cov iav PC
Lawv tsis hnyav, muaj kev ua tau zoo ntawm kev tinting, thiab tiv taus kev cuam tshuam zoo dua, uas ua rau lawv kim dua.
Cov tsom iav PC kov yeej cov teeb meem kev ntxhov siab thiab astigmatism uas tshwm sim los ntawm kev hloov pauv ntawm cov tsom iav TAC ib txwm muaj tom qab raug teeb tsa. Lawv muaj kev tiv thaiv kev cuam tshuam zoo heev (60 npaug ntawm cov tsom iav iav, 20 npaug ntawm cov tsom iav TAC, thiab 10 npaug ntawm cov tsom iav resin) thiab siv dav hauv kev tsav dav hlau thiab tub rog. Tib lub sijhawm, cov tsom iav PC yog lub teeb yuag, ua 37% sib dua li cov tsom iav resin feem ntau.
Qhov Sib Txawv NtawmCov Lens PolarizedThiab Cov Lens Tinted
Cov tsom iav uas muaj xim tsuas yog siv lub luag haujlwm ntawm kev txo lub teeb, thiab lawv tsis tuaj yeem lim lub teeb tawm. Lawv tsuas yog tuaj yeem txo qhov muaj zog ntawm lub teeb ci ntsa iab, lub teeb ultraviolet, thiab lwm yam, thiab tsis tuaj yeem thaiv cov teeb ci phem no tag nrho. Tib lub sijhawm, vim yog lub teeb txo qis, nws cuam tshuam rau kev xa mus ntawm cov tsom iav, ua rau muaj kev phom sij rau kev nyab xeeb rau cov neeg hnav.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-29-2023