Muraayadaha muraayadaha
Maalmihii hore ee hagaajinta aragga, dhammaan muraayadaha muraayadaha indhaha waxay ka samaysan yihiin dhalo.
Qalabka ugu muhiimsan ee muraayadaha muraayadaha waa muraayadda indhaha.Tilmaanta refractive-ku way ka sarraysaa kan lenska resin-ka, markaa muraayadda dhaladu way ka dhuuban tahay lenska resin ee isla awoodda ah.Tusmada dib-u-celinta ee muraayadda muraayadda waa 1.523, 1.60, 1.70, 1.80, 1.90.Muraayadaha muraayadaha waxay leeyihiin gudbin wanaagsan iyo sifooyin makaanoochemical: index refractive joogto ah iyo sifooyinka jirka iyo kiimikaad deggan.
In kasta oo muraayadaha muraayadda ay bixiyaan indho-indheyn gaar ah, way culus yihiin oo si fudud ayay u jabi karaan, taasoo suurtogal ah inay dhaawac halis ah u geystaan ​​isha ama xitaa lumis isha.Sababahan dartood, muraayadaha muraayadaha ayaan hadda si weyn loogu isticmaalin muraayadaha indhaha.

Muraayadaha caaga ah.
● 1.50 CR-39
Sannadkii 1947-kii, Shirkadda Lens-ka ee Armorlite ee California waxay soo bandhigtay muraayadihii ugu horreeyay ee muraayadaha caagga ah ee khafiifka ah.Muraayadaha ayaa laga sameeyay polymer caag ah oo loo yaqaan CR-39, oo loo soo gaabiyo "Columbia Resin 39," sababtoo ah waxay ahayd qaabaynta 39-aad ee caag kuleyl ah oo lagu daaweeyay oo ay samaysay PPG Industries horraantii 1940-yadii.
Sababtoo ah miisaankeeda khafiifka ah (qiyaastii kala badh miisaanka galaaska), qiimo jaban iyo tayada muuqaalka wanaagsan, CR-39 caag ah ayaa weli ah qalab caan ah oo loogu talagalay muraayadaha muraayadaha indhaha xitaa maanta.
● 1.56 NK-55
Kuwa ugu jaban ee muraayadaha Tusaha sare oo aad u adag marka loo eego CR39.Maaddaama maaddadani ay ku dhowdahay 15% khafiif ah oo 20% ka fudud tahay 1.5 waxay siisaa ikhtiyaar dhaqaale oo loogu talagalay bukaannada u baahan muraayadaha khafiifka ah.NK-55 waxa uu leeyahay Abbe qiimihiisu yahay 42 taas oo ka dhigaysa doorasho wanaagsan ee daawoyinka u dhexeeya -2.50 iyo +2.50 dioptres.
● muraayadaha caagga ah ee index-sare
20kii sano ee la soo dhaafay, iyada oo laga jawaabayo baahida loo qabo muraayadaha khafiifka ah ee khafiifka ah, tiro ka mid ah soosaarayaasha muraayadaha ayaa soo bandhigay muraayado caag ah oo heer sare ah.Muraayadahani way ka khafiifsan yihiin oo ka fudud yihiin muraayadaha caagga ah ee CR-39 sababtoo ah waxay leeyihiin tusmeyn sare oo dib-u-gurasho waxayna sidoo kale yeelan karaan cuf-jiid hoose oo gaar ah.
Taxanaha MR™ waa muraayad indho-indheyn heersare ah oo ay naqshadaysay Japan Mitsui Kiimikooyinka oo leh index refractive sare, qiimaha Abbe sare, cuf-jiidad gaar ah oo hoose iyo iska caabin sare leh.
Taxanaha MR™ wuxuu si gaar ah ugu habboon yahay muraayadaha indhaha waxaana loo yaqaanaa saldhigga ugu horreeya ee thiourethane ee muraayadda index sare.Taxanaha MR™ wuxuu bixiyaa badeecooyin kala duwan si ay u bixiyaan xalka ugu fiican ee isticmaalayaasha muraayadaha indhaha.
RI 1.60: MR-8
Maaddada muraayadda lenska ee ugu wanaagsan ee dheellitiran oo leh saamiga ugu badan ee RI 1.60 lens-ka suuqa.MR-8 wuxuu ku habboon yahay lensiska indhaha ee xoogga leh waana heer cusub oo walxaha lenska indhaha ah.
RI 1.67: MR-7
Halbeegga caalamiga ah ee RI 1.67 walxaha lenska.Qalab weyn oo loogu talagalay muraayadaha khafiifka ah ee leh iska caabin xoog leh.MR-7 waxa uu leeyahay karti midab midab leh oo ka fiican.
RI 1.74: MR-174
Waxyaalaha lenska index aadka u sarreeya ee muraayadaha khafiifka ah ee aadka u khafiifka ah.Dadka xidhan lenses-ka adag ee dhakhtarku qoray hadda way xor ka yihiin muraayadaha dhumucda iyo kuwa culculusba.

muraayadaha polycarbonate.
Polycarbonate waxaa loo sameeyay 1970-meeyadii si loogu isticmaalo codsiyada hawada sare, waxaana hadda loo isticmaalaa koofiyada koofiyadda ee cirbixiyeennada iyo muraayadaha hawada sare ee hawada.Muraayadaha muraayadaha indhaha ee ka samaysan polycarbonate ayaa la soo bandhigay horraantii 1980-meeyadii iyaga oo ka jawaabaya baahida muraayadaha miisaanka u adkaysta.
Tan iyo markaas, muraayadaha polycarbonate waxay noqdeen halbeegga muraayadaha badbaadada, muraayadaha ciyaaraha iyo muraayadaha indhaha carruurta.Sababtoo ah waxay u badan tahay inay jabaan marka loo eego muraayadaha caagga ah ee caadiga ah, muraayadaha polycarbonate waxay sidoo kale yihiin doorasho wanaagsan oo loogu talagalay naqshadaha muraayadaha indhaha ee aan rim-beelka lahayn halkaasoo muraayadaha ay ku xiran yihiin qaybaha jir ee leh dhejiska.
Inta badan muraayadaha kale ee caagga ah waxay ka samaysan yihiin habka wax lagu shubo, halkaas oo wax caag ah oo dareere ah lagu dubay muddo dheer qaab muraayad ah, xoojinta caaga dareeraha ah si loo abuuro muraayad.Laakiin polycarbonate waa heerkulbeeg ka bilaabma walxo adag oo ah qaab pellets yar yar.Habka soo saarista muraayadaha loo yaqaan mudista mudista, pellets waa la kululeeyaa ilaa ay dhalaalaan.Polycarbonate dareeraha ah ayaa markaa si degdeg ah loogu duraa caaryada muraayadaha, lagu cadaadiyo cadaadis sare oo la qaboojiyo si ay u sameeyaan wax soo saarka muraayadda la dhammeeyey daqiiqado gudahood.

muraayadaha Trivex
Inkasta oo ay jiraan faa'iidooyin badan, polycarbonate ma aha muraayadda kaliya ee ku habboon codsiyada badbaadada iyo muraayadaha indhaha carruurta.
Sannadkii 2001, PPG Industries (Pittsburgh, Penn.) waxay soo bandhigtay wax lens oo xafiiltama oo la yiraahdo Trivex.Sida muraayadaha polycarbonate, muraayadaha ka samaysan Trivex waa kuwo dhuuban, fudfudud iyo saameyn aad u adkaysi badan marka loo eego muraayadaha caaga ah ama muraayadaha caadiga ah.
Lenses Trivex, si kastaba ha ahaatee, waxay ka kooban yihiin monomer ku salaysan urethane waxayna ka samaysan yihiin habka wax lagu dhejiyo ee la mid ah sida muraayadaha caaga ah ee caadiga ah loo sameeyo.Tani waxay siinaysaa lensyada Trivex faa'iidada muraayadaha crisper optics marka loo eego muraayadaha polycarbonate ee la isku duro, marka loo eego PPG.