Yuav ua li cas kom paub qhov zoo ntawm lub lens teeb siv nyob rau hauv lub tshuab microscope
Microscope ob peb axes nyob rau hauv tib txoj kab ncaj nraim (xws li kho qhov muag axis) ntawm lub hollow hlau lub tog raj kheej, los yog Olympus microscope parallel kev npaj thiab qhov chaw ntawm lub voj voog nyob rau hauv cov hlau diaphragm yog ib tug axisymmetric qauv ntawm cov electrode. Thaum lawv ntxiv ib qho hluav taws xob, lawv tuaj yeem tsim cov axisymmetric faib ntawm electrostatic teb. Lub tshuab hluav taws xob flutter no tuaj yeem ua rau lub tshuab ntsuas hluav taws xob tsom rau cov duab, yog li nws hu ua electrostatic microscope. Muaj ntau ntau hom electrostatic lo ntsiab muag. Yog hais tias muaj peev xwm faib rau ntawm axis ntawm symmetry generated tom qab daim ntawv thov ntawm voltage raws li ib tug feature, Olympus yuav roughly muab faib ua plaub pawg ntawm microscopes.
Tib lub peev xwm lens ib lub tshuab tsom rau sab laug thiab sab xis ntawm lub axis ntawm Olympus muaj peev xwm yog qhov tsis tu ncua thiab sib npaug: immersion lens ib lub tshuab tsom rau sab laug thiab sab xis ntawm lub axis ntawm lub peev xwm yog qhov tas li tab sis tus nqi tsis sib npaug rau ib leeg. diaphragm lens (tseem hu ua membrane aperture lens) lub luag hauj lwm ntawm lub lens yog concentrated nyob ib ncig ntawm lub diaphragm aperture. Qhov kev siv hluav taws xob ntawm lub axis ntawm txhua qhov ntawm ob txoj cai ntawm lub tshuab tsom iav yog tas li. Lub voj aperture ntawm lub diaphragm ib leeg yog siv me ntsis, tab sis feem ntau nws tuaj yeem siv los ua ib feem ntawm qee cov lo ntsiab muag nyuaj.
Immersion Objective Ib yam khoom emitting electrons yog immersed ncaj qha nyob rau hauv lub hluav taws xob teb ntawm no hom ntawm microscope, thiab on-axis muaj peev xwm nyob rau lwm yam (ie, duab-sab) sab ntawm lub Nikon lens yog tas li. Nrog rau kev zam ntawm chav kawm 4, lwm yam peb hom electron-qhib lo ntsiab muag tuaj yeem suav tias yog lub tshuab tsom, thiab yog li lawv cov khoom-sab focal neeg thiab cov duab-sab focal offsets tuaj yeem txiav tawm. Cov mis rau lub focal ntev ntawm ob hom lo ntsiab muag ntawm chav kawm 1,2 yog.
Nws tsis yog qhov nyuaj los ua pov thawj tias qhov focal ntev nyob rau hauv monopotential thiab immersion lo ntsiab muag yog tas li zoo, uas txhais tau hais tias cov Nikon microscopes ib txwm converge. Thaum ib lub diaphragm lo ntsiab muag tuaj yeem ua qhov sib txawv lo ntsiab muag, raws li kev ua tau zoo ntawm lub hom phiaj immersion lo ntsiab muag yuav tsum tau soj ntsuam raws li qhov xwm txheej. Ib qho piv txwv ntawm ib hom nruas yog rab phom electron siv nyob rau hauv Nikon microscopes thiab lwm yam electron beam raj. Nws txoj haujlwm yog tsim cov kab hluav taws xob hluav taws xob nrog qee qhov sib txawv ntawm cov duab thiab qhov siv tam sim no.
