Indima yeGranite ekuvelisweni kweeLensi eziBalaseleyo.

 

I-Granite, ilitye lendalo eliyi-igneous elenziwe ngokuyintloko yi-quartz, i-feldspar kunye ne-mica, idlala indima ebalulekileyo kodwa edla ngokunganakwa ekuvelisweni kweelensi ezichanekileyo. Iimpawu ezikhethekileyo ze-granite zenza ukuba ibe yinto efanelekileyo kwiintlobo ngeentlobo zezicelo kwishishini le-optical, ingakumbi ekwenzeni iilensi ezikumgangatho ophezulu zeekhamera, ii-microscopes kunye neeteleskopu.

Enye yezona nzuzo ziphambili zegranite kukuzinza kwayo okumangalisayo. Xa usenza iilensi ezichanekileyo, ukugcina umphezulu ozinzileyo nozinzileyo kubalulekile ukuqinisekisa ukucaca nokuchaneka kokukhanya. I-coefficient ephantsi yokwandiswa kobushushu begranite ithetha ukuba ayizukugoba okanye iguquguquke ngenxa yokutshintsha kobushushu, nto leyo eyenza ukuba ibe yinto efanelekileyo yesiseko sokugaya nokupolisha ilensi. Olu kuzinza luvumela abavelisi ukuba bafikelele kumlinganiselo ochanekileyo ofunekayo kwizinto ezibonakalayo ezisebenzayo.

Ukuqina kwegranite kukwenza kubaluleke kakhulu ekuvelisweni kweelensi. Le nto inokumelana neenkqubo eziqinileyo zokusila nokupolisha ezifunekayo ukwenza iindawo ezigudileyo nezingenasiphako ezifunekayo kwiilensi ezichanekileyo. Ngokungafaniyo nezinto ezithambileyo, igranite ayigugi lula, iqinisekisa ukuba izixhobo ezisetyenziswa ekuvelisweni kweelensi ziya kuhlala zisebenza kakuhle ngokuhamba kwexesha. Oku kuhlala ixesha elide konga imali kubavelisi kuba banokuthembela kwizixhobo zegranite ixesha elide ngaphandle kokuzitshintsha rhoqo.

Ukongeza, ubuhle bendalo begranite kunye nemibala eyahlukeneyo kunokuphucula ubuhle bezixhobo ze-optical. Nangona ukusebenza kubalulekile, impembelelo ebonakalayo yeelensi ezichanekileyo kunye neendawo zazo zokuhlala nazo zinokuchaphazela ukhetho lwabathengi. Ukusebenzisa igranite kwezi zicelo akuniki nje kuphela isiseko esomeleleyo nesithembekileyo, kodwa kongeza nesici sobuhle.

Ngamafutshane, iipropati ezikhethekileyo zegranite (ukuzinza, ubulukhuni, kunye nobuhle) zenza ukuba ibe yinto exabisekileyo ekuveliseni iilensi ezichanekileyo. Njengoko imfuno yetekhnoloji yokukhanya ephucukileyo iqhubeka ikhula, indima yegranite kushishino inokuba yinto ebaluleke ngakumbi, ukuqinisekisa ukuba abavelisi banokuhlangabezana nemigangatho engqongqo efunekayo yokusebenza kokukhanya okusemgangathweni ophezulu.