1.523 Ikirahuri Bifocal Ifoto Yumwanya Photogrey Lens

Iyo guhindura ijisho ry'umuntu gucogora bitewe n'imyaka, aba akeneye gukosora icyerekezo cye ukurikije icyerekezo cya kure kandi cyegereye. Muri iki gihe, akenera kwambara ibirahuri bibiri bitandukanye, ibyo bikaba bitoroshye. Niyo mpamvu, birakenewe gusya imbaraga ebyiri zitandukanye zo kuvunika kumurongo umwe kugirango uhinduke lens mubice bibiri. Izo lens zitwa bifocal lens cyangwa ibirahuri bifocal.

Ubwoko bwa Fusion:ni uguhuza ibikoresho bya lens hamwe nigipimo cyinshi cyo kwangirika mukarere kegeranye ku isahani nkuru ku bushyuhe bwinshi, kandi igipimo cyo kuvunika cya plaque nini kiri hasi. Noneho wiruke hejuru yubutaka kugirango ukore ubugororangingo bwibice-buke bihuye nibice byingenzi. Nta bwumvikane buke. Gusoma inyongera A biterwa nimbaraga zo gukurura F1 yubuso bwimbere bwumurima wa kure wicyerekezo, kugabanuka FC ya arc yumwimerere arc arc hamwe nikigereranyo cyo guhuza. Ikigereranyo cya fusion nubusabane bukora hagati yikintu cyangiritse cyibikoresho bibiri bya fusion lens, aho n igereranya indangagaciro yo kwangirika kwikirahure kinini (ubusanzwe ikirahuri cyambikwa ikamba) naho ns igereranya indangantego ya sub-sheet (ikirahure cya flint) hamwe agaciro kanini, hanyuma igipimo cyo guhuza k = (n-1) / (nn), nuko A = (F1-FC) / k. Birashobora kugaragara duhereye kuri formula yavuzwe haruguru ko mubitekerezo, guhindura isura yimbere yimbere yisahani nkuru, kugabanuka arc arc curvature hamwe na sub-plate retractive index irashobora guhindura impamyabumenyi yinyongera, ariko mubyukuri, mubisanzwe bigerwaho muguhindura indangantego ya sub-plate. Imbonerahamwe 8-2 yerekana indangagaciro yo kwangirika yikirahure cya flint ikirahuri gikunze gukoreshwa kwisi kugirango gikore hafi-yongeyeho indorerwamo ya fusion bifocal.