Kufumura zvinhu zvema lenzi emagirazi

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Lens ukobvu mumagirazi kunokonzerwa nezvinhu zvakawanda, pakati peiyo lens simba ndiro chinhu chikuru.Ukobvu hweLens hweYakakwira Myopia hwakakora kupfuura yeyakaderera Myopia.Nekudaro, kana zvasvika pakukora kwese, dhayamita yeLens yakakoshawo, uye kusarudza diki furemu kunogona kuderedza zvakanyanya ukobvu hweLens.Chimiro cheLens chakakoshawo, senge Myopia mune gobvu repariferi chikamu che concave Lens, Hyperopia iri mukati mepakati penzvimbo yeConvex Lens uye yakaonda yeperipheral.

Iyo refractive index (Chikumi 20) yelenzi chinhu chakakosha uye chinhu chinobvumira murwere kudzora ukobvu hweLens.Refractive index ndiyo chiyero chemwero wekuti chiedza chinopfuura nepamwe svikiro (segirazi, mvura, plastiki, mweya) kusvika pachiyero chayo muvacuum.Iyo yakakwirira iyo refractive index, iyo inoderedza mwero wekufambisa kwechiedza mukati mepakati, uye zvakanyanya kuoneka kupenya kwechiedza.Saka, lens ine high refractive index inoramba chiedza zvakanyanya uye naizvozvo yakatetepa kupfuura lens ine low refractive index.

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Magirazi ave achigadzirwa negirazi kwemazana emakore, uye vamwe varwere vachiri kusimbirira pamagirazi egirazi nekuti vanonzwa kuti anovapa iwo emhando yepamusoro yekuona.Magirazi emazuva ano magirazi anogadzirwa kubva kuCrown Glass, chinhu chine yakaderera chromatic aberration uye kuramba kukwenya.Crown Glass ine yakakwira refractive index, yakatokwirira kupfuura iyo yemalenzi mazhinji epurasitiki.Nekudaro, nekuda kwehupamhi hwayo, girazi rekorona rinorema kupfuura lenzi epurasitiki ine yakafanana refractive index, kunyangwe magirazi epurasitiki anowanzo kukora.Varwere vanowanzosarudza akareruka lenzi, ndosaka vachisarudza epurasitiki lenzi pane korona yegirazi.

Iyo Yakajairwa Plastiki yemagirazi emagirazi ndeye Columbia Resin-39(CR-39) .Iyi yakanaka lens zvinhu, isingakwenye, uye inorema hafu chete seyakaenzana girazi lenzi.Nekudaro, iyo yakaderera refractive index inoreva kuti iyo Lenzi yakakora kana yaitwa magirazi epamusoro-diopta.

Yakasiyana-siyana yepurasitiki lens zvinhu zvakagadzirwa, zvichikonzera yakakwirira refractive index asi yakatetepa, yakareruka lenzi.Zvakadai sepolycarbonate (1.586) , polyurethane (1.595) uye kunyange yakakosha zvinhu girazi (1.70).Aya lenzi haana kukora kupfuura evamwe varwere vemyopic, nepo achipa huwandu hwepamusoro madhigirii ehurefu.Nekudaro, zvimwe zvezvinhu izvi zvine akakura aberration pane yakaderera refractive index zvinhu uye hazvitenderwe nyore.Zvizhinji zvezvishandiso izvi zvakapfava, zvinoshingirira kuputsika kupfuura girazi kana CR-39 plastiki, asi zvakanyanya kukwenya.

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Nguva yekutumira: Jul-28-2021