Masiku ano, anthu ambiri amakhulupirira kuti magalasi okwera mtengo kwambiri amakhala abwino!Kuti amvetsetse psychology ya ogula iyi, mashopu owonera nthawi zambiri amagwiritsa ntchito index ya refractive ngati malo ogulitsa kuti awonjezere mtengo wa magalasi kuti apeze phindu lalikulu pazachuma.Kukwera kwa refractive index, lens imachepa thupi, imakwera kwambiri, ndipo mtengo wake umakwera!Ndiye kodi ndizowona kuti kuchuluka kwa magalasi owoneka bwino kumakhala bwinoko?Tiye tikambirane.
Magalasi abwino owoneka bwino amayenera kutanthauza magalasi okhala ndi mawonekedwe abwino, omwe amawonetsedwa ndi kuwala kwapamwamba, kubalalikana kwakung'ono, kukana kuvala bwino, chitetezo champhamvu cha ultraviolet, komanso chitetezo chabwino cha radiation.
Nthawi zambiri refractive index of lens imaphatikizapo 1.49, 1.56, 1.61, 1.67, 1.74, 1.8, 1.9.Myopia ingagawidwe kukhala myopia yofatsa (mkati mwa madigiri 3.00), myopia yapakati (pakati pa 3.00 ndi 6.00 madigiri), ndi myopia yapamwamba (pamwamba pa madigiri 6.00).Nthawi zambiri myopia wofatsa ndi wapakatikati (yosanja mpaka madigiri 400) CHOICE refractive index ndi 1.56 OK, (300 degrees mpaka 600 degrees) mu 1.56 kapena 1.61 mitundu iwiri iyi ya refractive index isankha yoyenera kwambiri, madigiri 600 pamwambapa amatha kuganizira 1.67 kapena 1.74 refractive index lens.Zoonadi, izi siziri mtheradi, makamaka malinga ndi kusankha kwa chimango ndi momwe maso awo alili kuti asankhe.
Kukwera kwa refractive index, kucheperachepera kwa lens, ukadaulo wapamwamba wofunikira, mtengo wake ndi wapamwamba, koma kutanthauzira kutsika, kutsika kwa refractive index kudzakhala!
Mlozera wa refractive ukakhala wapamwamba kwambiri, kuwunikiranso kumachitika pambuyo poti kuwala kumadutsa mu lens, ndipo lens imachepa kwambiri.Komabe, kuchuluka kwa refractive index ndi, m'pamenenso kufalikira kumakhala kovuta kwambiri, kotero kuti lens yapamwamba ya refractive index imakhala ndi nambala yotsika ya Abbe.Mwa kuyankhula kwina, refractive index ndi apamwamba, mandala ndi woonda, koma maonekedwe a mtundu si wolemera monga pafupifupi 1.56.Ma lens apamwamba a refractive index nthawi zambiri amagwiritsidwa ntchito pamadigiri masauzande.
Ubwino waukulu wa magalasi apamwamba a refractive index ndi kuonda kwawo, komwe sikumapangitsa kuti aziwoneka bwino.Ogula posankha magalasi, ayenera kusankha molingana ndi madigiri osiyanasiyana a diso kuti agwirizane ndi iwowo, magwiridwe antchito abwino kwambiri a mandala, kufunafuna akhungu kwa index yayikulu ya refractive sikofunikira, koyenera ndikofunikira kwambiri!
Nthawi yotumiza: Aug-08-2022