Lub koob yees duab Cheebtsam

1. Photoconductive lub koob yees duab raj: lead oxide raj, selenium arsenic tellurium raj.
2. Lub xeev photoelectric sensor CCD: Txoj kev loj hlob zoo, txawm nyob rau hauv kev tshaj tawm lossis kev lag luam, yog rau CCD los hloov lub koob yees duab raj.
3. Complementary Hlau Oxide Semiconductor (CMOS): Lub tshuab tsis paub tab, tus nqi thiab kev siv hluav taws xob qis dua CCD, tab sis lub suab nrov yog siab thiab cov duab ntxim nyiam qis dua CCD. High tech CMOS imaging tsis yog qis dua rau CCD duab.
Lub koob yees duab Cheebtsam
Ib qho cuab yeej ua tiav cov duab decomposition thiab photoelectric teeb liab hloov dua siab tshiab. Duab decomposition yog cov txheej txheem ntawm kev rhuav tshem cov duab ua tiav rau hauv ob peb lub pixels ywj siab (qhov tsawg tshaj plaws uas tsim cov duab hauv TV). Feem ntau hais lus, ntau pixels muaj, qhov pom tseeb dua. Txhua pixel yog sawv cev los ntawm ib qho xim thiab ci. Lub koob yees duab ntaus ntawv tuaj yeem hloov lub teeb liab ntawm txhua pixel hauv daim duab rau hauv cov khoom siv hluav taws xob sib txuas, thiab tom qab ntawd xa lawv mus rau qhov chaw tso zis hauv ib qho kev txiav txim. Cov cuab yeej siv lub koob yees duab tau muab faib ua ob pawg: lub koob yees duab raj thiab cov khoom siv hauv lub xeev (semiconductor) lub koob yees duab.
① Lub koob yees duab raj thiab cov khoom siv hluav taws xob hluav taws xob tau muab faib ua ntau hom, xws li cov raj duab, photomultiplier duab raj, orthorectified duab raj, thiab photoconductive koob yees duab raj. Cov hlau lead oxide phototransistors feem ntau yog siv hauv cov koob yees duab tshiab. Txhua yam ntawm lub koob yees duab raj muaj lub plhaub iav lub tshuab nqus tsev, uas muaj lub hom phiaj nto thiab rab phom electron. Cov ntsiab lus yog duab ntawm lub hom phiaj nto los ntawm lub qhov rais ntawm lub iav plhaub, thiab lub teeb pom kev ntawm txhua qhov chaw ntawm lub hom phiaj saum npoo yog hloov dua siab tshiab rau hauv cov khoom siv hluav taws xob uas siv cov photoelectric emission effect lossis photoconductive nyhuv ntawm lub hom phiaj nto, tig lub teeb. duab rau hauv daim duab hluav taws xob. Tsav los ntawm deflection coil sab nraum lub raj, lub nqaj hlau electron scans lub hom phiaj ntawm qhov taw tes los ntawm taw tes thiab kab los ntawm kab, thiab tso tawm cov teeb meem muaj peev xwm ntawm txhua pixel ntawm txoj kev scanning hauv ib ntus.
② Cov khoom siv hluav taws xob hauv lub xeev, hom tshiab ntawm cov khoom siv sib txuas (CCD). Pua pua txhiab ntawm cov cuab yeej siv tau teem rau hauv ib qho array, thiab qhov chaw muaj cov khoom siv photosensitive. Cov ntsiab lus yog duab ntawm lub array, thiab tus nqi ntawm cov nqi khaws cia hauv txhua chav yog proportional rau lub illuminance. Los ntawm kev siv lub moos pulses thiab hloov cov cim qhia, cov teeb liab ntawm txhua chav nyob hauv array tuaj yeem txav mus rau hauv ib qho kev txiav txim kom tau txais cov duab hluav taws xob teeb liab nrog qhov sib txawv ntawm lub sijhawm.
Lub preamplifier yog ib qho video amplifier uas nthuav tawm cov teeb liab tsis muaj zog los ntawm lub koob yees duab ntaus ntawv mus rau qhov amplitude. Txhawm rau kom ntseeg tau tias qhov teeb meem zoo-rau-lub suab sib piv, nws yuav tsum tau hais tias lub preamplifier muaj lub suab nrov tsawg tshaj plaws.