22.06.01 Nws
KhoomTsaus tam sim noyog lub koob yees duab suab nrov qhov chaw uas yog kub- thiab raug-lub sij hawm-dependent, ntsuas nyob rau hauv electrons ib pixel, ib ob ntawm lub sij hawm raug.Rau cov ntawv thov siv lub sij hawm raug tsawg tshaj li ib ob, nrog rau qhov tsaus ntuj tam sim no tsawg dua 1e-/p / s, nws feem ntau tuaj yeem tsis quav ntsej hauv kev xam cov teeb liab-rau-nruab nrab.
Piv txwv li, ntawm qhov tsaus ntuj tam sim no tus nqi ntawm 0.001 e / p / s, lub sij hawm raug ntawm 1ms los yog 60 vib nas this ob qho tib si ua rau lub suab nrov tsis txaus ntseeg, qhov twg tus nqi suab nrov yog muab los ntawm qhov tsaus ntuj tam sim no tus nqi sib npaug los ntawm lub sij hawm raug, tag nrho hauv qab square cag.Txawm li cas los xij, lub koob yees duab sib txawv nrog 2e- / p / s ntawm 60s raug yuav ua rau muaj kev cuam tshuam ntxiv √120 = 11e- ntawm cov suab nrov tam sim no tsaus nti, uas tej zaum yuav yog qhov tseem ceeb tshaj qhov nyeem cov suab nrov ntawm cov teeb pom kev tsawg.Txawm li cas los xij, ntawm 1ms raug, txawm tias qhov siab dua qhov tsaus ntuj tam sim no yuav tsis pom zoo.
Daim duab 1: Daim duab 1(a) los ntawm Tucsen txias CMOS lub koob yees duabFL 20 BWtias qhov tsaus ntuj tam sim no tsawg li 0.001e/pixel/s.Daim duab 1(b) qhia tias daim duab 1(a) muaja zoo heev keeb kwm yav dhau uasalm feem ntau tiv thaiv cov suab nrov tam sim no txawm hais tias lub sijhawm kis tau ntev li 10s.
Tsaus tam sim no suab nrov yog tshwm sim los ntawm thermal motion ntawm electrons nyob rau hauv lub koob yees duab sensor.Tag nrho cov atoms muaj thermal vibrational suab, thiab qee zaus ib lub tshuab hluav taws xob tuaj yeem 'dhia' tawm ntawm lub koob yees duab sensor lub substrate mus rau hauv lub pixel zoo qhov twg cov photoelectrons tau khaws cia.Nws yog tsis yooj yim sua kom paub qhov txawv ntawm cov 'thermal' electrons thiab electrons uas tau tshwm sim los ntawm kev ua tiav kev tshawb pom ntawm photon.Thaum pom cov duab, cov thermal electrons tuaj yeem tsim, ua rau lub teeb liab tsaus nti tam sim no.Txawm li cas los xij, tus naj npawb ntawm cov electrons yog random, ua rau muaj kev cuam tshuam ntawm cov suab nrov tam sim no.Thaum kawg ntawm qhov raug, tag nrho cov nqi raug ntsuas tshem tawm ntawm lub pixel npaj rau qhov tshwm sim tom ntej.
Lub suab nrov tam sim no yog qhov kub thiab txias, tab sis nws kuj tseem nyob ntawm lub koob yees duab sensor tus tsim thiab architecture thiab lub koob yees duab hluav taws xob, yog li tuaj yeem sib txawv ntawm lub koob yees duab mus rau lub koob yees duab ntawm tib lub ntsuas kub.
Puas yog qhov tsaus nti tam sim no tseem ceeb rau kuv daim duab?Txawm hais tias tus nqi tam sim no tsaus nti yuav ua rau muaj txiaj ntsig zoo rau koj cov duab 'cov teeb liab-rau-lub suab nrov piv thiab cov duab zoo yog nyob ntawm koj qhov xwm txheej ua duab.
Rau cov teeb pom kev siab teeb pom kev zoo nrog ntau txhiab tus photons ib pixel tom qab lub koob yees duab raug, tsaus nti tam sim no tsis zoo li qhov tseem ceeb hauv cov duab zoo tshwj tsis yog raug ti.mes ntev heev (ntaus vib nas this mus rau feeb) xws li hauv kev siv astronomy.
Daim duab 2: Tucsen lub sij hawm ntev raug lub koob yees duab pom zoo
