Ngokwandiswa kolwazi lokusetyenziswa kwabathengi, ngakumbi nangakumbi abathengi abanikeli ngqalelo kuphela kwinkonzo yevenkile ethengisa izinto, kodwa banika ingqwalasela engakumbi kumdla weemveliso ezithengiweyo (iilensi).Ukukhetha iiglasi zamehlo kunye neefreyimu kulula, kuba umkhwa ukhona kwaye izinto azithandayo zicacile, kodwa xa kuziwa ekukhetheni iilensi, ingqondo yomntu iqala ukulimaza.Zonke ziilensi ezimbini ezicacileyo, kwaye amaxabiso ahluke ngokulula, isalathiso se-refractive, inombolo ye-Abbe, ukukhanya okuchasene noluhlaza okwesibhakabhaka, ukulwa nokudinwa… kukho imvakalelo yokuwa okusondele!
Namhlanje, makhe sithethe ngokulula malunga nendlela yokwaphula igama eliyimfihlo lale milinganiselo yeelensi!
I. Refractive Index
Isalathiso seRefractive yeyona parameter ikhankanywe rhoqo kwiilensi, echazwa njengomlinganiselo wesantya sokusasazwa kokukhanya kwiatmosfera ukuya kuloo lens.Ivakala inzima, kodwa eneneni ilula kakhulu.Ukusabalalisa ukukhanya emoyeni kukhawuleza kakhulu, kwaye le parameter ichaza ukuba bahluke kangakanani omnye komnye.Ngale parameter, singakwazi kwakhona ukwazi ubukhulu be-lens.
Ngokuqhelekileyo, kubonakaliswa ukuba isalathisi esiphezulu se-refractive index, i-lens encinci kwaye i-lens iyathandeka ngakumbi.
Isalathiso se-refractive resin ngokubanzi: 1.499, 1.553, 1.601, 1.664, 1.701, 1.738, 1.76, njl. Ngokuqhelekileyo, kucetyiswa ukuba abantu abanombono osondeleyo we-3.00D okanye ngaphantsi banokukhetha iilensi phakathi kwe-1.499 kunye ne-1.499;abantu abanombono osondeleyo we-3.00D ukuya kwi-6.00D banokukhetha iilensi phakathi kwe-1.601 kunye ne-1.701;kunye nabantu abanombono osondeleyo ngaphezulu kwe-6.00D banokuqwalasela iilensi ezinesalathisi esiphezulu se-refractive.
II.Inombolo ka-Abbe
Inombolo ye-Abbe ithiywe ngoGqr. Ernst Abbe kwaye ichaza ubukhulu becala ukusasazwa kwelensi.
I-Lens Dispersion (iNombolo ye-Abbe): Ngenxa yokwahluka kwesalathiso se-refractive kwi-wavelengths eyahlukileyo yokukhanya kwi-medium efanayo ecacileyo, kunye nokukhanya okumhlophe okubunjwe ngamaza ahlukeneyo okukhanya okunemibala, izinto ezicacileyo ziya kuba nesiganeko esikhethekileyo sokusasazeka xa kukhanya ukukhanya okumhlophe, ifana nenkqubo evelisa umnyama.Inombolo ye-Abbe sisalathiso solungelelwaniso oluphambeneyo olumele ukukwazi ukusasazeka kwemathiriyeli ebonisa elubala, ngexabiso elincinane elibonisa ukusasazwa okunamandla.Ubudlelwane kwi-lens kukuba: iphezulu inombolo ye-Abbe, i-dispersion encinci kwaye iphezulu umgangatho obonakalayo.Inani le-Abbe liphakathi kwama-32 ukuya kuma-59.
III.Amandla okuRefractive
Amandla erefractive ngokuqhelekileyo abandakanya i-1 ukuya kwi-3 iingceba zolwazi, kuquka amandla angqukuva (okt myopia okanye hyperopia) kunye namandla cylindrical (astigmatism) kunye axis of astigmatism.Amandla eSpherical amele iqondo le-myopia okanye i-hyperopia kunye namandla e-cylindrical amele iqondo le-astigmatism, ngelixa i-axis ye-astigmatism inokuthathwa njengendawo ye-astigmatism kwaye yahlulwe ngokubanzi kunye nomgaqo (ngokuthe tye), ngokuchasene nomthetho (the nkqo), kwaye i-axis etyebileyo.Ngamandla alinganayo e-cylindrical, ngokuchasene nomgaqo kunye ne-oblique axis kunokuba nzima kancinane ukuziqhelanisa.
Umzekelo, umyalelo kagqirha -6.00-1.00X180 umele myopia of 600 degrees, astigmatism of 100 degrees, kunye axis of astigmatism kwicala 180.
IV.Ukukhuselwa kokukhanya okuBlue
Ukukhuselwa kokukhanya okuluhlaza okwesibhakabhaka ligama elidumileyo kwiminyaka yamuva nje, njengoko ukukhanya okuluhlaza kukhishwa kwizikrini ze-LED okanye izibane kwaye umonakalo wayo ubonakala ngokubonakalayo ngokusetyenziswa ngokubanzi kweemveliso ze-elektroniki.
Ixesha lokuposa: Feb-21-2023