Saj zawg zog hnub ci vaj huam sib luag, ua ib daim ntawv tshiab ntawm lub hnub ci tshuab hluav taws xob, ua haujlwm ntawm lub hauv paus ntsiab lus zoo xws li cov hnub ci vaj huam sib luag, ob qho tib si raws li cov nyhuv photoelectric. Thaum lub hnub ci ci rau ntawm cov khoom siv hluav taws xob ntawm lub hnub ci hloov tau yooj yim, photons nyiam cov khoom siv hluav taws xob, ua rau lawv dhia mus rau hauv cov khoom siv hluav taws xob, yog li tsim hluav taws xob tam sim no. Qhov tam sim no tom qab ntawd ntws los ntawm cov kab hluav taws xob sab hauv ntawm tes thiab tuaj yeem siv los siv hluav taws xob ntau yam khoom siv hluav taws xob lossis khaws cia rau kev siv tom qab.
Tus yuam sij rau lub hnub ci hloov tau yooj yim yog nyob rau hauv lawv siv cov ntaub ntawv hloov tau yooj yim, tsis yog cov qauv nruj ntawm cov tsoos silicon substrates. Cov khoom siv hloov pauv tau yooj yim no muaj qhov yooj yooj yim thiab plasticity, tso cai rau nws tuaj yeem khoov thiab ncab ntawm cov npoo nkhaus, yog li nthuav dav nws cov ntawv thov ntau yam.
