Cov khoom tseem ceeb qhia txog thermal imaging hmo ntuj pom kev ntaus ntawv
Lub microchannel phaj (MCP) nyob rau hauv lub raj siv tau los ua kom tiav qhov no vim hais tias thaum electrons dhau los ntawm lub raj, cov atoms hauv nws emit electrons zoo sib xws, tus naj npawb ntawm cov uas yog sib npaug rau cov thawj tus xov tooj ntawm electrons multiplied los ntawm ib yam (txog ib ob peb txhiab zaus). Ua haujlwm. Lub phaj microchannel yog lub iav me me uas tsim los nrog cov tshuab fiber ntau optic uas muaj ntau lab feeb pores (microchannels) sab hauv. Hlau electrodes txuas rau ntawm ob sab ntawm microchannel phaj, uas yog nyob rau hauv lub tshuab nqus tsev. Txhua microchannel zoo ib yam li lub tshuab hluav taws xob hauv qhov uas nws nyob ib puag ncig 45 zaug ntev dua li qhov dav.
Thaum photocathode electrons ntaus thawj electrode ntawm lub microchannel phaj, ib tug high voltage ntawm 5, 000 volts ntawm ob lub electrodes ua rau cov electrons yuav tsum propelled los ntawm lub iav microchannel. Cascading Secondary emission yog cov txheej txheem ntawm ntau txhiab tus electrons nyob rau hauv microchannel raug tso tawm raws li ib tug electron hla nws. Yooj yim hais, ib zaug thawj zaug electrons tsoo nrog lub microchannel phab ntsa, cov atoms zoo siab tso tawm cov hluav taws xob ntxiv. Ntxiv nrog rau kev tawm tsam lwm cov atoms, cov khoom siv hluav taws xob ntxiv no tau teeb tsa cov tshuaj tiv thaiv kab mob uas qee cov electrons nkag mus rau hauv microchannel thiab ntau txhiab tawm.MCP's microchannels muaj qhov tshwm sim txaus ntshai: lawv tilted me ntsis (los ntawm 5-8 degree ), uas tsis tsuas yog txhawb kev sib tsoo ntawm electron tab sis kuj txo cov lus tawm tswv yim ion thiab cov lus pom ncaj qha los ntawm phosphor txheej ntawm cov zis.
Hmo ntuj pom kev dluab paub rau lawv eerie ntsuab sheen.
Cov electrons tawm tsam ib qho screen uas tau coated nrog phosphor ntawm daim duab intensifier raj kawg. Txij li thaum cov electrons nyob rau hauv tib txoj kev uas cov photons tau ua thaum lawv thawj kab, cov electrons tuav lawv cov txheeb ze txoj hauj lwm thaum lawv txav mus los ntawm microchannel, kom ntseeg tau tias cov duab sib xws. Lub phosphor nkag mus rau hauv lub xeev zoo siab thiab tso tawm photons vim lub zog nqa los ntawm cov electrons. Hmo ntuj pom kev tsom iav 'cov duab ntsuab ntawm qhov screen yog tsim los ntawm cov phosphors.Cov duab phosphorescent ntsuab yog pom los ntawm ntau hom lo ntsiab muag hu ua eyepieces, thiab nws tuaj yeem siv los nthuav lossis mloog cov duab. NVD tuaj yeem siv los saib cov duab ncaj qha los ntawm eyepieces lossis txuas nrog cov khoom siv hluav taws xob zoo li cov saib.
