Kev piav qhia dav dav txog qhov pom kev hmo ntuj lub peev xwm thev naus laus zis
Thaum electrons hla lub raj, cov atoms nyob rau hauv lub raj yuav tso tawm cov electrons zoo sib xws, tus naj npawb ntawm cov uas yog thawj tus naj npawb ntawm cov electrons muab los ntawm ib qho tseem ceeb (kwv yees li ob peb txhiab zaus), thiab cov phaj microchannel (MCP) hauv lub raj tuaj yeem. siv los ua kom tiav qhov no. Ua haujlwm. Lub phaj microchannel yog cov iav me me uas muaj ntau lab lub qhov hws me me (microchannels) sab hauv, ua los ntawm fiber ntau optic technology. Lub phaj microchannel yog nyob rau hauv lub tshuab nqus tsev thiab hlau electrodes yog mounted ntawm ob sab ntawm lub phaj. Txhua microchannel yog kwv yees li 45 npaug ntev dua 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 lub iav microchannel nyob rau hauv qhov kev txiav txim ntawm ib tug high voltage ntawm 5, 000 volts ntawm ob lub electrodes. Thaum electrons dhau los ntawm microchannel, ntau txhiab tus electrons hauv cov channel raug tso tawm, txheej txheem hu ua cascading secondary emission. Nyob rau hauv luv luv, tus thawj electrons ntaus ob sab ntawm microchannel, thiab cov atoms zoo siab ces tso ntau electrons. Cov hluav taws xob tshiab no tseem ntaus lwm cov atoms, tsim cov tshuaj tiv thaiv kab mob uas ib txhais tes ntawm electrons nkag mus rau microchannel thiab ntau txhiab tawm mus. Ib qho 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 kom muaj kev sib tsoo hluav taws xob, tab sis kuj txo cov ion tawm tswv yim thiab cov lus pom ncaj qha los ntawm phosphor txheej ntawm cov zis.
Hmo ntuj pom kev dluab paub rau lawv eerie ntsuab sheen.
Thaum kawg ntawm daim duab intensifier raj, cov electrons tsoo lub phosphor-coated screen. Cov electrons tuav lawv txoj haujlwm txheeb ze thaum lawv dhau los ntawm microchannel, uas ua kom muaj kev ncaj ncees ntawm daim duab vim tias cov electrons nyob rau hauv tib txoj kev uas cov photons lined nyob rau hauv thawj qhov chaw. Lub zog nqa los ntawm cov electrons no ua rau phosphor mus txog lub xeev zoo siab thiab tso tawm photons. Cov phosphor no tsim cov duab ntsuab ntawm qhov screen, uas yog ib qho ntawm cov tsom iav hmo ntuj. Los ntawm lwm ob lub lo ntsiab muag hu ua eyepieces, cov duab ntsuab phosphorescent tuaj yeem pom, thiab tuaj yeem siv los nthuav cov duab lossis kho kom pom tseeb. NVD tuaj yeem txuas nrog cov khoom siv hluav taws xob, xws li cov saib, lossis saib ncaj qha cov duab los ntawm lub qhov muag.
