Ib nkawm lo ntsiab muag haum rau koj tus kheej yuav tsum tau muab xam rau hauv kev ua ke nrog peb cov degree, cov menyuam kawm ntawv nyob deb, ncej puab, pob nyiaj siv, siv scenario thiab lwm yam.
Lub refractive index zoo li cov khau loj.Txawm hais tias hom twg, cov no yog cov tsis sib xws, uas tuaj yeem nkag siab zoo li lub thickness ntawm lub lens.Qhov siab dua qhov refractive index, lub lens thinner.Tib yam 500 degree myopia, 1.61 lens yog 1.56 nyias.
Txawm hais tias qhov siab dua qhov refractive index yog, qhov thinner nws yog.Feem ntau hais lus, qhov siab dua qhov refractive index yog, qhov qis dua tus naj npawb Abbe.Xaiv cov degree uas tsim nyog rau koj tus kheej
Txawv refractive indexes muaj txawv Abbe tooj.Cov hauv qab no yog Abbe cov lej sib raug rau qhov sib txawv refractive indexes:
1.50 ib
Ab 58
Tus naj npawb Abbe siab heev yog ze rau qhov pom ntawm qhov muag liab qab.Lub lens spherical yuav tuab heev yog tias qhov degree siab.Nws tsuas yog tsim nyog rau qis-degree myopia hauv 250 degrees.Lub hauv paus nkhaus yog qhov loj, thiab nws tsis haum rau cov tsom iav loj.
1.56 ib
Abbe Nos 35-41
Tus naj npawb Abbe yog nruab nrab, 1.56 yog qhov qis tshaj qhov taw qhia ntawm lub lens hom, uas yog pheej yig thiab haum rau myopia hauv 300 degrees;Tsis pom zoo yog tias qhov kub siab tshaj 350 degrees.Lub lens yuav thicker thaum lub degree siab dua.
1.60 ib
Abbe Nos 33-40
1.60 thiab 1.61 yog cov cwj pwm kev sau ntawv sib txawv nrog tib qhov kev taw qhia tsis zoo.Tsis muaj qhov sib txawv.Raws li ntau hom thiab series, tus naj npawb ntawm Abbe txawv ntawm 33-40.Piv txwv li, kev tiv thaiv hluav taws xob ntawm lub hli ci 1.60 yog 33 dB, thiab PMC series ntawm lub hli ci yog 40 dB.
1.67 ib
Ab 32
Tsawg Abbe naj npawb, loj dispersion thiab cov duab dav dav.Nyob rau hauv qhov ntau ntawm 550-800 degree myopia, 1.61 yog tuab heev, pob nyiaj siv tau txwv, thiab nws tsis ntau tshaj 1.71, yog li 1.67 yog qhov kev xaiv tsis sib haum.
1.71 ib
Ab 37
Feem ntau hais lus, qhov siab dua qhov refractive index ntawm lub lens, qhov qis dua tus naj npawb Abbe thiab ntau dua qhov dispersion.Txawm li cas los xij, nrog kev tawg ntawm cov khoom siv lens, txoj cai no tau tawg.Piv txwv li, 1.71 yog nyias dua 1.67, thiab tus lej Abbe yog siab dua.
1.74 ib
Ab 33
Qhov feem ntau refractive index thiab Abbe tus naj npawb ntawm cov resin lens yog tsawg, thiab tus nqi kuj yog siab.Txawm li cas los xij, rau siab myopia, tsis muaj lwm txoj kev xaiv.Tom qab tag nrho, lub thickness yog ib txwm intuitive kev paub.Tshaj 800 degrees tuaj yeem txiav txim siab, thiab ntau dua 1000 degrees tuaj yeem txiav txim siab yam tsis xav txog lwm yam.Tsuas yog phim 1.74.
Post lub sij hawm: Mar-09-2023