Lub teeb pom kev tsaus ntuj ua haujlwm li cas?
Hmo pom kev thev naus laus zis suav nrog ob hom tseem ceeb: lub teeb pom kev zoo (lossis txhim kho lub teeb tsis muaj zog) thiab kev tshawb pom infrared (lossis ntsuas kub). Cov neeg siv khoom siv hmo ntuj feem ntau yog tsim los ua kom lub teeb pom kev zoo. Tag nrho cov khoom siv thev naus laus zis ATN hmo ntuj siv lub teeb pom kev zoo. Cov txheej txheem no siv lub teeb me me, xws li lub teeb ci nyob hauv ib puag ncig ib puag ncig (xws li lub hli lossis lub hnub qub), los hloov lub zog lub teeb (lub npe hu ua photons los ntawm cov kws tshawb fawb) rau hauv hluav taws xob (xws li electrons). Cov electrons no dhau los ntawm ib qho nyias nyias, kwv yees li 1/4 nti loj, muaj ntau tshaj 10 lab channels. Thaum ib qho hluav taws xob hla txoj hauv kev, ntau txhiab tus electrons raug tsoo tawm ntawm phab ntsa ntawm txoj kev. Cov electrons uas loj hlob los ntawm cov khoom lag luam yog tom qab hloov mus rau hauv photons thiab qhia koj cov duab tsaus ntuj, txawm tias nws tsaus heev.
Qhov sib txawv ntawm cov khoom siv hmo ntuj pom kev
Cov cuab yeej pom kev hmo ntuj tau muab faib ua thawj tiam, tiam thib ob, thiab tiam thib peb raws li qib ntawm kev txhim kho cov hlab ntsha.
Qhov thib peb tiam tam sim no yog qhov kev siv tshuab pom kev hmo ntuj tshaj plaws ntawm cov pej xeem. Nws nto yog coated nrog ib tug heev rhiab heev gallium arsenide photocathode txheej, uas muaj peev xwm zoo hloov lub teeb rau hauv hluav taws xob nyob rau hauv lub teeb tsis muaj zog heev. Lub cim thib peb muab cov duab pom tseeb thiab pom kev hmo ntuj. Ib qho kev ua tau zoo ntawm cov duab intensifier raj nrog qhov tsawg kawg ntawm 51lp / mm yog 3 units siab dua li tus qauv yam tsawg kawg nkaus ntawm 45lp / mm. Kab ib millimeter (lp/mm) yog ib chav ntsuas uas siv nyob rau hauv high-resolution duab intensifiers los tsim cov duab meej.
Qhov thib ob tiam kev loj hlob ntawm lub rooj tsavxwm Circuit Court tuaj yeem tsim tau kaum tawm txhiab tus electrons. Qhov no ua rau pom cov duab meej thaum hmo ntuj, tsis muaj kev cuam tshuam piv rau thawj tiam thiab xoom tiam.
Thawj tiam muaj teeb meem nrog distortion thiab luv lifespan ntawm cov hlab li. Nws siv cov ntaub ntawv uas muaj txiaj ntsig zoo hauv kev hloov pauv photoelectrons dua li lub cim zero. Cov cuab yeej no muaj peev xwm ua haujlwm ntawm lub teeb ci qis dua li Generation Zero, hu ua "starlight brightness". Imported night vision systems feem ntau siv thawj tiam duab intensifiers, txawm tias lawv hais tias yog tiam thib ob.
Raws li rau Zero tiam, nws vam khom lub teeb lub zog los txhim kho lub teeb sab nraud. Cov hluav taws xob hloov dua siab tshiab los ntawm lub teeb yog concentrated los ntawm cov khoom siv hluav taws xob thiab nrawm los ntawm cov khoom siv conical (anode), yog li lawv muaj zog ntau dua thaum lawv ntaus lub fluorescent screen, tsim cov duab. Hmoov tsis zoo, kev nrawm electrons ua rau txo qis hauv cov duab zoo thiab lub neej luv luv ntawm cov duab raj.
