1.59 PC Polycarbonate yopita patsogolo Lens
Chifukwa chiyani ma lens a polycarbonate?
Polycarbonate ndi chinthu chosagwira ntchito kwambiri. Idapangidwa m'zaka za m'ma 1970 kuti ikhale yogwiritsa ntchito zamlengalenga kuphatikiza ma visor a chisoti cha astronaut ndi ma windshields apamlengalenga, ndiye ngati palibe china, ndizabwino kwambiri…
Pofika m'zaka za m'ma 1980 polycarbonate inali kugwiritsidwa ntchito ngati magalasi chifukwa inali yopyapyala, yopepuka komanso yosamva mphamvu kuposa galasi. Masiku ano ndi muyezo wa magalasi oteteza chitetezo, magalasi a ana ndi magalasi amasewera, chifukwa champhamvu kwambiri kukana.
Polycarbonate ndi thermoplastic yomwe imayamba kupanga ma lens ngati ma pellets omwe amapangidwa mwanjira yotchedwa jekeseni. Pochita izi ma pellets amapanikizidwa mopanikizika kwambiri kukhala ma lens moulds, kenako atakhazikika kuti apange mandala apulasitiki olimba.
Komanso kulimba kwake, magalasi a polycarbonate mwachilengedwe amatchinga 100% ya kuwala kwa dzuwa kwa dzuwa popanda kufunikira kwa zokutira, kutanthauza kuti maso anu amatetezedwa bwino. Magalasi awa amaperekedwanso muzosankha zambiri (monga magalasi opita patsogolo) kuposa zida zina zamphamvu kwambiri.
Ngakhale polycarbonate mosakayikira imapanga mandala osamva, kulimba kwake kumabwera pamtengo. Polycarbonate imakhala ndi kuwala kwa lens kwambiri kuposa pulasitiki kapena galasi, zomwe zikutanthauza kuti zokutira zotsutsana ndi zowunikira zingakhale zofunikira. Kupitilira apo polycarbonate ili ndi mtengo wa Abbe wongokwana 30, kutanthauza kuti imapereka mawonekedwe osawoneka bwino pazosankha zomwe takambirana kale.
Magalasi a Presbyopia - Patsogolo
Ngati muli ndi zaka zoposa 40 ndipo mukuvutika ndi masomphenya anu pafupi ndi pafupi ndi dzanja lanu, mwayi wanu umakhala ndi presbyopia. Magalasi opita patsogolo ndiye yankho lathu labwino kwambiri ku presbyopia, kukupatsani masomphenya akuthwa patali kulikonse.
Kodi Ubwino Wa Magalasi Opita Patsogolo Ndi Chiyani?
Mofanana ndi ma lens a bifocal, ma lens opita patsogolo amalola wogwiritsa ntchito kuwona bwino pamatali osiyanasiyana kudzera pa lens imodzi. Lens yopita patsogolo pang'onopang'ono imasintha mphamvu kuchokera pamwamba pa mandala mpaka pansi, ndikupatsa kusintha kosalala kuchokera ku masomphenya akutali kupita ku masomphenya apakati / apakompyuta mpaka pafupi / kuwerenga masomphenya.
Mosiyana ndi ma bifocals, ma lens opita patsogolo ambiri alibe mizere kapena zigawo zosiyana ndipo ali ndi mwayi wopereka masomphenya omveka bwino pamtunda waukulu wamtunda, osakulepheretsani mtunda wautali kapena katatu. Izi zimawapangitsa kukhala chisankho chodziwika kwa anthu ambiri.
Momwe Mungadziwire Ngati Magalasi Otsogola Ndi Oyenera Kwa Inu?
Ngakhale mandala opita patsogolo amakupatsani mwayi wowona kutali komanso kutali, magalasi awa siwoyenera kwa aliyense.
Anthu ena samazolowera kuvala ma lens opita patsogolo. Izi zikakuchitikirani, mutha kukhala ndi chizungulire nthawi zonse, mavuto ozindikira mwakuya, ndi kupotoza kwa zotumphukira.
Njira yokhayo yodziwira ngati magalasi opita patsogolo angagwire ntchito kwa inu ndikuyesa ndikuwona momwe maso anu amasinthira. Ngati simusintha pakadutsa milungu iwiri, dokotala wanu wamaso angafunikire kusintha mphamvu ya mandala anu. Mavuto akapitilira, lens ya bifocal ikhoza kukhala yoyenera kwa inu.
