Kodi mumadziwa zoyambira zamagalasi?

Ndi kupititsa patsogolo chidziwitso cha ogula, makasitomala ochulukirachulukira samangoyang'ana ntchito yogulitsira zinthu, komanso amayang'anitsitsa chidwi cha zinthu zomwe adagula (magalasi).Kusankha magalasi ndi mafelemu ndikosavuta, chifukwa momwe zimakhalira ndipo zomwe amakonda zimamveka bwino, koma posankha magalasi, ubongo umayamba kuvulaza.Onse ndi mandala awiri, ndipo mitengo yake ndi yosiyana, refractive index, Abbe number, anti-blue kuwala, anti-kutopa… pali kumverera kwa kugwa kwayandikira!

Lero, tiyeni tingolankhula za momwe mungaswe mawu achinsinsi a magawo awa a lens!

I. Refractive Index

Refractive index ndiye gawo lomwe limatchulidwa pafupipafupi mu ma lens, lomwe limatanthauzidwa ngati chiŵerengero cha liwiro la kufalikira kwa kuwala mumlengalenga ndi momwe kuwala kumawonekera.Zikumveka zovuta, koma kwenikweni zosavuta.Kufalikira kwa kuwala mumlengalenga kumathamanga kwambiri, ndipo chizindikirochi chikufotokoza momwe amasiyana ndi wina ndi mzake.Kupyolera mu parameter iyi, tikhoza kudziwanso makulidwe a lens.

Nthawi zambiri, zimawoneka kuti kuchuluka kwa refractive index, disolo yocheperako komanso yokongola kwambiri imapangidwa.

Mndandanda wa refractive wa resin nthawi zambiri ndi: 1.499, 1.553, 1.601, 1.664, 1.701, 1.738, 1.76, ndi zina zotero.anthu omwe ali ndi chidwi choyandikira -3.00D mpaka -6.00D amatha kusankha magalasi pakati pa 1.601 ndi 1.701;ndipo anthu omwe ali ndi chidwi choyang'ana pafupi -6.00D amatha kulingalira magalasi okhala ndi index yotsika kwambiri.

II.Nambala ya Abbe

Nambala ya Abbe imatchedwa Dr. Ernst Abbe ndipo imafotokoza makamaka za kupezeka kwa mandala.

Dispersion ya Lens (Abbe Number): Chifukwa cha kusiyana kwa refractive index kwa mafunde osiyanasiyana a kuwala mu sing'anga yowonekera yomweyi, komanso kuwala koyera komwe kumapangidwa ndi mafunde osiyanasiyana a kuwala kwamitundu yosiyanasiyana, zida zowonekera zimakumana ndi chodabwitsa cha kubalalitsidwa pakuwala koyera, mofanana ndi njira yomwe imatulutsa utawaleza.Nambala ya Abbe ndi inverse proportionality index yomwe imayimira kuthekera kwa zinthu zowonekera, zomwe zili ndi mtengo wocheperako womwe ukuwonetsa kubalalitsidwa kwamphamvu.Ubale wa mandala ndi: kuchuluka kwa nambala ya Abbe, kuchepera kwa kubalalitsidwa komanso mawonekedwe apamwamba.Nambala ya Abbe nthawi zambiri imakhala pakati pa 32 mpaka 59.

III.Mphamvu ya Refractive

Mphamvu ya refraction imakhala ndi chidziwitso chimodzi kapena zitatu, kuphatikiza mphamvu yozungulira (ie myopia kapena hyperopia) ndi cylindrical power (astigmatism) ndi axis of astigmatism.Mphamvu yozungulira imayimira digiri ya myopia kapena hyperopia ndi mphamvu ya cylindrical ikuyimira mlingo wa astigmatism, pamene olamulira astigmatism amatha kuonedwa ngati malo a astigmatism ndipo nthawi zambiri amagawidwa ndi lamulo (mopingasa), motsutsana ndi ulamuliro (molunjika), ndi oblique axis.Ndi mphamvu yofanana ya cylindrical, motsutsana ndi ulamuliro ndi oblique axis zitha kukhala zovuta pang'ono kusintha.

Mwachitsanzo, kulembedwa kwa -6.00-1.00X180 kumayimira myopia ya madigiri 600, astigmatism ya madigiri 100, ndi axis of astigmatism molunjika 180.

IV.Blue Light Protection

Chitetezo cha kuwala kwa buluu ndi mawu otchuka m'zaka zaposachedwa, chifukwa kuwala kwa buluu kumachokera ku zowonetsera za LED kapena magetsi ndipo kuvulaza kwake kukuwonekera kwambiri ndi kufala kwa zinthu zamagetsi.