Vim li cas thiaj tuaj yeem hloov xim / photochromic myopia lens hloov xim

Raws li myopic nquag tshwm sim, txhua hom tsom iav myopic tshwm sim nyob rau hauv qhov kawg, yog li cas cov xim hloov myopic tsom iav yog qhov teeb meem uas txhua tus neeg mob siab tshaj plaws.Vim tias discoloration myopia tsom iav saib zoo, yog li nws yog qhov kev xaiv ntawm ntau tus neeg mob myopic, hauv qab no rau cov iav tsom iav discoloration yuav ua li cas los qhia meej rau koj.

Lub lens photochromic yog tsim los ntawm kev ntxiv cov nyiaj bromide thiab tooj liab oxide micrograins rau hauv iav zoo tib yam.Thaum raug lub teeb muaj zog, nyiaj bromide tawg ua nyiaj thiab bromine.Cov nplej me me ntawm cov nyiaj uas decompose muab lub khob xim av tsaus.Thaum lub teeb dimmed, cov nyiaj thiab bromine tau catalyzed los ntawm tooj liab oxide los ua nyiaj bromide dua.Yog li ntawd, cov xim ntawm cov lo ntsiab muag tau sib dua dua.

Tsis tshua muaj stylish "photochromic lens" thiab "Polarized hnub lo ntsiab muag"

Haum rau txhua tus neeg, suav nrog cov neeg pom luv

Ua ntej, lub lens yog ua los ntawm cov iav tsis muaj xim

Iav uas hloov xim thaum irradiated los ntawm lub teeb ntawm ib tug wavelength tsim nyog thiab restores nws cov xim qub thaum lub teeb ntawm lub teeb raug tshem tawm.Kuj hu ua photochromic iav los yog lub teeb xim iav.Cov iav hloov xim yog tsim los ntawm kev ntxiv cov khoom siv xim xim rau hauv cov iav raw khoom.Cov khoom siv no muaj ob lub molecules sib txawv lossis cov qauv hluav taws xob hauv lub xeev, hauv thaj chaw pom lub teeb muaj ob qhov sib txawv ntawm qhov nqus coefficient, nyob rau hauv qhov kev txiav txim ntawm lub teeb, tuaj yeem hloov ntawm ib qho qauv mus rau lwm hom qauv, ua rau cov xim hloov pauv, feem ntau muaj nyiaj. halide xim iav, txhuas nyob rau hauv sodium borate iav ntxiv ib qho me me ntawm cov nyiaj halide (AgX) ua ib qho sensitizer, Tom qab ntxiv cov kab ntawm tooj liab thiab cadmium ions ua sensitizer, lub iav yog fused thiab kho cua sov ntawm qhov tsim nyog kub kom cov nyiaj halide concentrate rau hauv cov khoom.Thaum nws yog irradiated los ntawm ultraviolet lub teeb los yog luv nthwv dej ntawm lub teeb pom kev, nyiaj ions raug txo mus rau silver atoms, thiab ib tug xov tooj ntawm cov nyiaj atoms sib sau ua ke rau hauv colloid ua lub iav xim;Thaum lub teeb nres, cov nyiaj atoms ua nyiaj ions thiab ploj mus nyob rau hauv irradiation ntawm thermal hluav taws xob los yog lub teeb ntev (liab lossis infrared).

 

Silver halide xim-hloov iav tsis yooj yim rau qaug zog, tom qab ntau tshaj 300,000 hloov ntawm lub teeb thiab ntxoov ntxoo, tseem tsis poob, yog ib qho khoom siv los ua cov iav hloov xim.Cov iav hloov xim kuj tuaj yeem siv rau cov ntaub ntawv khaws cia thiab tso saib, cov duab hloov dua siab tshiab, tswj lub teeb siv thiab hloov kho.

Ob, lub ntsiab cai ntawm kev hloov xim

Cov iav uas lub lens yuav hloov xim raws li lub teeb ambient hloov.Tag nrho lub npe photochromic tsom iav, tseem hu ua lub teeb xim tsom iav.Cov xim ntawm lub lens yuav tsaus dua thiab lub teeb xa hluav taws xob txo qis thaum lub lens yog irradiated los ntawm ultraviolet thiab luv-yoj pom lub teeb nyob rau hauv tshav ntuj.Nyob rau hauv tsev los yog tsaus lens lub teeb transmittance nce, ploj mus kom rov pom kev.Lub photochromism ntawm lub lens yog tsis siv neeg thiab thim rov qab.Cov iav hloov xim tuaj yeem kho lub teeb xa mus los ntawm lub lens xim hloov, kom tib neeg lub qhov muag tuaj yeem hloov pauv ntawm ib puag ncig lub teeb, txo qhov pom kev qaug zog, tiv thaiv lub qhov muag.Chromic lens chromic ua ntej muab faib tsis muaj lub hauv paus xim thiab lub teeb xim muaj ob hom xim puag;Cov xim tom qab discoloration yeej muaj grey, tawny ob yam.

1964 Corning Glass Company tau tsim cov iav photochromic.Tam sim no, lub ntiaj teb lub ntsiab manufacturers ntawm discolored iav lens dawb paug yog lub tebchaws United States thiab Fabkis corning iav tuam txhab, lub teb chaws Yelemees Schott Group tshwj xeeb iav tuam txhab thiab lub UK Chance Pilkington tuam txhab.Beijing, Tuam Tshoj, thiab lwm yam manufacturers tsim xim - hloov lo ntsiab muag.

Lub lens chromic muaj nyiaj halide (silver chloride, silver bromide) microcrystals.Thaum raug lub teeb pom kev zoo xws li lub teeb ultraviolet lossis luv wavelength pom lub teeb, lub halide ion emits electrons, uas tau ntes los ntawm cov nyiaj ion, thiab cov kev tshwm sim hauv qab no tshwm sim:

Cov xim tsis muaj xim halide tawg rau hauv opaque silver atoms thiab pob tshab halogen atoms, uas nqus lub teeb thiab ua rau lub lens tsis pom.Txij li thaum lub halogen nyob rau hauv lub lens discoloration tsis khiav, reversible tshwm sim tuaj yeem tshwm sim.Tom qab lub teeb ua kom raug tshem tawm, cov nyiaj thiab halogen tau rov ua dua los kho lub lens rau nws qhov qub ntshiab, tsis muaj xim lossis lub teeb xim.Cov ntsiab lus ntawm silver halide micrograins yog hais txog 4×1015 / cm3, txoj kab uas hla yog li 80 ~ 150, thiab qhov nruab nrab ntawm qhov nruab nrab ntawm cov khoom yog hais txog 600. Cov khoom siv photochromic ntawm cov xim tsis muaj xim yog piav qhia los ntawm qhov tsaus ntuj - kho cov yam ntxwv nkhaus (saib daim duab).TO yog thawj qhov kev xa tawm ntawm lub lens iav ua ntej raug, thiab TD yog qhov xa tawm ntawm lub lens ntawm 550nm wavelength tom qab raug TO 5× 104Lx xenon teeb rau 15 feeb.THF yog lub sijhawm rov qab ib nrab, uas yog, lub sijhawm xav tau rau kev xa tawm ntawm lub lens uas tsis muaj xim kom rov qab los tom qab nres.Cov xim zoo nkauj hloov lub lens yuav tsum yog pob tshab, tsis muaj emulsifying xim thiab lustre, ib nrab rov qab lub sij hawm luv luv, rov qab sai.Thawj kis ntawm chromic lo ntsiab muag yam tsis muaj xim thawj yog li 90%.Thawj kis ntawm chromatic lo ntsiab muag nrog cov xim thawj tuaj yeem ua rau qis li 60 ~ 70%.Kev xa ntawm cov looj tsom iav dav dav hom xim hloov lub lens txo mus rau 20 ~ 30% tom qab lub teeb tawg.Qhov zoo ntawm cov xim ntawm lub lens discoloration yog ntiav, lub teeb hloov tom qab transmittance li ntawm 40 ~ 50%.

Peb, txheej txheem ntau lawm

Discoloration iav siv iav discoloration raws li muaj pes tsawg leeg yog muab faib ua borosilicate discoloration iav thiab txhuas phosphate discoloration iav.Tuam Tshoj, Tebchaws Asmeskas, Lub Tebchaws Yelemees thiab lwm yam borosilicate iav, lub tebchaws United Kingdom siv aluminium phosphate iav.

Kev tsim cov xim hloov lens iav dawb muaj xws li kev npaj cov khoom sib xyaw, iav melting, nias molding thiab kho cua sov.Cov txheej txheem nruam melting yog siv nyob rau hauv lub melting ntawm discolored iav nyob rau hauv lub ntiaj teb no, thiab muaj ob txoj kev ntawm ib tug platinum crucible melting thiab nruam melting nyob rau hauv Tuam Tshoj.Tom qab cov xim hloov lub lens yog nias rau hauv cov duab, kev kho cua sov yuav tsum tau ua nyob rau hauv kev tswj kub nruj kom ua rau lub iav theem sib cais thiab tswj kom tsim tau ib tug loj tus naj npawb ntawm dispersed thiab nplua nyiaj halide microcrystals, uas muab lub lens photochromism.

Plaub, kev tsim cov khoom siv

 Cov iav uas muaj nyiaj bromide (los yog nyiaj chloride) thiab kab tooj liab oxide yog ib hom iav discoloration, thaum raug tshav ntuj los yog ultraviolet hluav taws xob, cov nyiaj bromide tshwm sim decomposition, nyiaj atoms (AgBr = = Ag + Br), nyiaj atomic zog rau nyiam lub teeb pom kev, thaum cov nyiaj atoms sib sau ua ke rau qee tus lej, qhov ci ntawm lub iav yog absorbed, Ameslikas tsis muaj xim pob tshab iav los ua ib zaj duab xis nyob rau lub sijhawm no, thaum lub khob rau hauv qhov tsaus ntuj, tom qab xim hloov hauv catalysis ntawm tooj liab. oxide, nyiaj thiab bromine atoms tuaj yeem ua ke rau hauv cov nyiaj bromide (Ag + Br = = AgBr), vim tias cov nyiaj ions tsis nqus cov teeb pom kev zoo, yog li cov iav yuav tsis muaj xim, pob tshab, qhov no yog lub hauv paus ntsiab lus ntawm xim iav discoloration.

Ua lub qhov rais iav nrog hloov xim iav, tuaj yeem ua rau lub teeb uas dhau los ntawm lub hnub ci ntsa iab dhau los ua kev poob siab thiab muaj lub siab txias, hloov xim iav kuj tuaj yeem siv los ua lub hnub ci lens, hloov xim tsom iav los ntawm qhov no.

Nyob rau hauv ib txwm muaj xwm txheej, tsuas yog qhov kev ntsuam xyuas photometric sib phim kom raug yuav tsis ua mob rau lub qhov muag, tab sis vim hais tias txhua tus neeg siv lub qhov muag tsis zoo ib yam, yog li tsis txhob sawv cev rau koj nrog tsom iav tom qab diopter yuav tsis nce.Kev lag luam xim ntawm lub lens myopic yog feem ntau zaj duab xis txheej discoloration thiab zaj duab xis puag discoloration ob yam, qhov txawv yog tias cov yeeb yaj kiab hloov cov tshuaj tiv thaiv ceev ceev, tsis muaj xim sib txawv, tus nqi yog me ntsis kim.Qhov ceev ntawm lub substrate yog qeeb, yog hais tias lub degree ntawm sab laug thiab txoj cai yuav tsis tshwm xim txawv, tab sis pheej yig, siv sij hawm ntev dua.Yog tias nws yog xim av, nws tsis pom zoo rau kev hnav mus ntev.

Hloov cov xim myopic tsom iav siv tau yooj yim dua, tsis xav tau looj tsom iav dub tshwj xeeb, nws yog cov looj tsom iav ntawm tus neeg mob myopic.Txawm li cas los xij, nws yuav siv sij hawm los hloov xim, uas tsis haum rau cov cheeb tsam uas lub teeb hloov sai sai thiab tsis tuaj yeem hloov mus tas li.Qhov siab myopia thiab tus neeg uas muaj qhov sib txawv loj ntawm qib ntawm ob lub qhov muag yuav tsum tsis txhob sib piv cov xim hloov.

Yuav ua li cas discoloration myopia tsom iav?Tiag tiag hloov cov xim myopic tsom iav thiab tsis muaj xim zoo ib yam, yuav tsis ua rau qhov muag qhov tob tob vim yog siv xim, hnav tsom iav kom xav ua tib zoo mloog cov ntsiab lus ntau dua, tsis txhob dag piv txwv nyeem phau ntawv, saib TV thiab siv computer kom deb li deb. raws li qhov ua tau tsis txhob cia siab rau ze dhau, txwv tsis pub cov degree myopic kuj tseem tuaj yeem ua kom tob zuj zus.

Pom saum toj no rau "hloov xim myopia tsom iav li cas" qhia, ntseeg tias koj tau nkag siab qee yam hloov xim myopia tsom iav.Nco ntsoov, nrog rau cov tsom iav myopia yuav tsum mus rau lub chaw kho qhov muag pom kev, thiaj li tsis ua yuam kev.


Post lub sij hawm: Aug-04-2021