Yav tas los, thaum xaiv cov tsom iav, cov neeg siv khoom feem ntau muab qhov tseem ceeb rau cov hom lag luam ua ntej. Lub koob npe nrov ntawm cov tuam txhab tsim tsom iav loj feem ntau sawv cev rau qhov zoo thiab kev ruaj khov hauv lub siab ntawm cov neeg siv khoom. Txawm li cas los xij, nrog rau kev txhim kho ntawm kev ua lag luam ntawm cov neeg siv khoom, "kev siv khoom rau tus kheej" thiab "ua kev tshawb fawb kom ntxaws" tau dhau los ua cov yam ntxwv tseem ceeb uas cuam tshuam rau cov neeg siv khoom niaj hnub no. Yog li cov neeg siv khoom them sai sai rau cov yam ntxwv ntawm cov tsom iav. Ntawm tag nrho cov yam ntxwv ntawm cov tsom iav, Abbe tus nqi yog qhov tseem ceeb heev thaum koj ntsuas cov tsom iav.
Tus nqi Abbe yog qhov ntsuas ntawm qib uas lub teeb tau tawg lossis sib cais thaum hla dhau lub lens. Qhov kev tawg tshwm sim txhua lub sijhawm thaum lub teeb dawb raug tawg ua nws cov xim sib xyaw. Yog tias tus nqi Abbe qis dhau, ces qhov kev tawg ntawm lub teeb yuav ua rau muaj qhov tsis zoo ntawm chromatic uas zoo li zaj sawv ncig cov khoom pom tshwj xeeb tshaj yog pom nyob ib puag ncig cov teeb pom kev zoo.
Ib qho yam ntxwv ntawm lub lens ntawd yog tias qhov siab dua tus nqi Abbe, qhov zoo dua ntawm cov peripheral optics yuav zoo dua; qhov qis dua tus nqi Abbe, qhov ntau dua chromatic aberration yuav. Hauv lwm lo lus, tus nqi Abbe siab txhais tau tias qis dispersion thiab pom tseeb dua, thaum tus nqi Abbe qis txhais tau tias siab dispersion thiab ntau xim blur. Yog li thaum koj xaiv cov optical lenses, nws yog qhov zoo dua los xaiv cov lenses nrog Abbe tus nqi siab dua.
Nov koj tuaj yeem nrhiav tus nqi Abbe rau cov khoom siv tseem ceeb ntawm cov iav hauv kev ua lag luam:
