Xa bekhetha iilensi ezimiselwe ngugqirha, abathengi abaninzi bakholelwa ukuba xa i-lens index iphezulu, umgangatho welensi uya kuba ngcono. Nangona kunjalo, ukusebenza kwelensi kuphenjelelwa zizinto ezininzi, kubandakanya ukusebenza kwe-optical, ubukhulu belensi, ubunzima, ixabiso, njl. Ukuqonda iimpawu zeelensi ezinee-indices ezahlukeneyo kunceda oogqirha bamehlo ukuba bacebise isisombululo esifanelekileyo kumntu ngamnye onxibe.
Ukusebenza kokukhanya
Ixabiso le-Abbe lilinganisa ubungakanani bokusasazwa kwe-chromatic okuveliswa zizinto zelensi. Ixabiso eliphezulu le-abbe lithetha ukubona okucacileyo ngaphandle kokuphazamiseka kombala.
- I-Index 1.50 inikezela ngexabiso eliphezulu le-Abbe phakathi kwazo zonke izixhobo zelensi ze-optical, inika ukucaca okugqwesileyo kokubonakalayo kunye nokusabalalisa okuncinci kwe-chromatic.
- Ngokubanzi, izixhobo eziphezulu ze-index zihlala ziquka ukutshintshiselana ngokucaca kwe-optical ukuze kufunyanwe iilensi ezincinci. Nangona kunjalo, i-index 1.60 kunye ne-1.71 zisabonelela ngexabiso eliphezulu le-Abbe.
Kubathengi abaneemithi eziphantsi kwaye bebeka phambili umgangatho wokubonakala, ilensi ye-index 1.50 iyacetyiswa kakhulu.
Ubukhulu kunye nobunzima
Ubukhulu kunye nobunzima belensi yenye yezona zinto zibonakalayo umahluko phakathi kwezinto ezisetyenziswayo.
- Isalathisi 1.50 kunye ne-1.56 zibonelela ngobukhulu obuqhelekileyo kunye nobunzima obuqhelekileyo.
- Isalathiso 1.60 kunye ne-1.67 zibonelela ngelensi ebhityileyo nekhaphukhaphu, nto leyo ephucula inkangeleko yobuhle ngakumbi kwiiresiphi eziphakathi ukuya kweziphezulu.
- I-Index 1.71 kunye ne-1.74 zibonelela ngelensi ebhityileyo nekhaphukhaphu, nto leyo eyenza ukuba zilungele kakhulu iiresiphi eziphezulu.
Njengoko isalathisi sisanda, iilensi ziya zincipha kwaye zikhanya, nto leyo ephucula ubuhle bokubona kunye nentuthuzelo yabanxibi.
Indawo yokuBeka iindleko
Ixabiso lelinye icandelo elibalulekileyo ekukhetheni iilensi. Ngokubanzi, i-higher index iza nexabiso eliphezulu, nangona kukho umahluko.
- Isalathisi 1.50 kunye ne-1.56 zibekwe njengezisombululo ezingabizi kakhulu kwimarike. Kodwa ixabiso le-1.50 liphezulu kune-1.56.
- Isalathiso 1.60 kunye ne-1.67 zimele icandelo eliphakathi ukuya kweliphezulu, ukulinganisela ukusebenza kunye nokufikeleleka.
- I-Index 1.71 ibiza kakhulu, kodwa ifikeleleka kakhulu kune-1.74.
- I-Index 1.74 lukhetho oluphezulu oluyilelwe iiresiphi eziphezulu kakhulu kunye neengqokelela ze-optical eziphezulu.
Isiphelo
Akukho salathisi selensi esinye esifanelekileyo kuye wonke umntu onxibe. Endaweni yoko, isisombululo esilungileyo seso sihambelana neemfuno zombono zomntu onxibe. Ukongeza kumanqaku angentla, izinto ezinje ngobukhulu besakhelo, imilo yesakhelo, umgama we-pupillary, kunye noyilo lwelensi nazo kufuneka ziqwalaselwe, njengoko zonke zinokuchaphazela ubukhulu belensi yokugqibela, inkangeleko, kunye nentuthuzelo yokunxiba iyonke.
Njengomvelisi weelensi ze-optical onguchwephesha, sinikezela ngepotifoliyo epheleleyo ye-lens index ukusuka kwi-1.50 ukuya kwi-1.74, kunye neendlela ezahlukeneyo zokugquma, i-photochromic, kunye neelensi ezinombala. Ngokunikezela ngokhetho olubanzi lwezisombululo zelensi, sinceda amaqabane ethu ehlabathi ukuba ahlangabezane neemfuno ezahlukeneyo zemarike ngelixa siqinisekisa ukuba wonke umntu onxibe le lensi unokufumana ilensi efanelekileyo kwiimfuno zakhe.
Ungafumana ulwazi oluthe kratya kwiphepha
https://www.universeoptical.com/stock-lens/