Thaum nws los txog rau cov cuab yeej pom kev hmo ntuj, cov neeg feem coob xav txog cov duab txhim kho tshuab. Qhov tseeb, cov duab txhim kho cov tshuab - feem ntau hu ua cov cuab yeej pom kev hmo ntuj (NVDs). Muaj cov duab intensifier raj hauv NVD, uas tuaj yeem siv los sau thiab nthuav dav infrared thiab pom lub teeb. Qhov no yog qhov kev txhim kho cov duab ua haujlwm li cas: Lub lens ib txwm hu ua lub hom phiaj ntes lub teeb pom kev zoo thiab qee qhov ze-infrared. Lub teeb sib sau tau xa mus rau cov duab intensifier raj. Nyob rau hauv feem ntau NVDs, lub hwj huam mov system rau cov duab intensifier raj rub lub hwj chim los ntawm ob lub N-Cl los yog "AA" roj teeb. Cov yeeb nkab yuav tso tawm qhov hluav taws xob siab txog li 5000 volts rau daim duab tube sib dhos.
Cov duab intensifier raj muaj photocathode uas hloov photons rau hauv electrons. Thaum cov electrons dhau los ntawm cov yeeb nkab, cov atoms hauv cov yeeb nkab yuav tso tawm cov hluav taws xob zoo sib xws, cov naj npawb ntawm cov khoom siv hluav taws xob uas yog thawj tus lej ntawm cov hluav taws xob sib npaug los ntawm qhov zoo tshaj (txog ob peb txhiab zaus), uas tuaj yeem ua tau los ntawm kev siv lub phaj microchannel (MCP) hauv cov kav dej ua haujlwm. Lub phaj microchannel yog lub iav me me uas muaj ntau lab lub qhov hws me me (microchannels) sab hauv, tsim los ntawm fiber ntau optic technology. Lub phaj microchannel yog nyob rau hauv lub tshuab nqus tsev, thiab hlau electrodes raug ntsia rau ntawm ob sab ntawm lub disc. Txhua microchannel yog kwv yees li 45 npaug ntawm nws qhov dav thiab ua haujlwm zoo li lub tshuab hluav taws xob. Thaum cov electrons los ntawm photocathode ntaus thawj electrode ntawm lub microchannel phaj, cov electrons yog ceev los ntawm iav microchannel nyob rau hauv qhov kev txiav txim ntawm ib tug high voltage ntawm 5000 volts ntawm ob lub electrodes. Thaum hluav taws xob dhau los ntawm microchannel, ntau txhiab tus electrons hauv cov channel raug tso tawm, txheej txheem hu ua cascade Secondary emission. Nyob rau hauv luv luv, tus thawj electrons ntaus ob sab ntawm microchannel, thiab cov atoms zoo siab tso tawm ntau electrons. Cov hluav taws xob tshiab no tseem ntaus lwm cov atoms, tsim kom muaj cov tshuaj tiv thaiv kab mob uas ua rau muaj ib txhais tes ntawm cov hluav taws xob nkag mus rau microchannel thiab ntau txhiab qhib cov channel. Qhov tshwm sim nthuav yog tias cov microchannels ntawm MCP muaj lub kaum sab xis me ntsis (txog 5-8 degree), uas tsis yog tsuas yog ua rau muaj kev sib tsoo hluav taws xob, tab sis kuj txo cov ion tawm tswv yim thiab kev tawm tswv yim ncaj qha los ntawm phosphor txheej ntawm tso zis. Hmo ntuj pom kev dluab yog qhov tseem ceeb rau lawv eerie ntsuab sheen.
Thaum kawg ntawm daim duab intensifier raj, tus tub tsoo lub phosphor-coated screen. Cov electrons tuav lawv txoj haujlwm txheeb ze thaum lawv dhau los ntawm microchannel, uas ua kom cov duab zoo vim tias cov khoom siv hluav taws xob tau teeb tsa tib yam li cov photons tau teeb tsa thawj zaug. Lub zog nqa los ntawm cov electrons no ua rau cov phosphor mus txog lub xeev zoo siab thiab emit photons. Cov phosphor no tsim cov duab ntsuab ntawm qhov screen, uas tau dhau los ua ib qho ntawm cov tsom iav hmo ntuj. Los ntawm lwm ob lub lo ntsiab muag hu ua eyepieces, cov duab phosphorescent ntsuab tuaj yeem pom, thiab lub ntsej muag tuaj yeem siv los nthuav cov duab lossis kho qhov tsom. NVDs tuaj yeem txuas nrog cov khoom siv hluav taws xob, xws li saib, lossis saib cov duab ncaj qha los ntawm lub qhov muag.
