Yuav Ua Li Cas Txiav Txim Qhov Zoo ntawm Cov Lens Sib Tsoo Siv Hauv Microscopes?
Lub hollow hlau lub tog raj kheej nrog ob peb axes ntawm tib txoj kab ncaj nraim (xws li kho qhov muag axis) ntawm lub tshuab tsom iav, los yog cov yeeb yaj kiab hlau nrog lub voj voog nyob hauv qhov chaw uas tau teem rau tib lub sijhawm nrog Olympus microscope, yog ib qho electrode nrog cov qauv axisymmetric. Thaum muaj qee qhov hluav taws xob siv rau lawv, axisymmetric static hluav taws xob teb tuaj yeem tsim tawm. Hom hluav taws xob no tuaj yeem tsom rau lub tshuab ntsuas hluav taws xob rau kev ntsuas, yog li nws hu ua electrostatic microscope. Muaj ntau hom electrostatic lo ntsiab muag. Yog tias tus cwj pwm los ntawm qhov muaj peev xwm faib tawm ntawm qhov axis ntawm symmetry tom qab siv qhov hluav taws xob, Olympus tuaj yeem faib cov tshuab ntsuas ntsuas rau plaub pawg:
Lub peev xwm Olympus nyob rau sab laug thiab sab xis ntawm ib lub peev xwm lens microscope yog tas li thiab sib npaug ntawm tus nqi; lub peev xwm ntawm sab laug thiab sab xis ntawm lub immersion lens microscope yog tas li tab sis tsis sib npaug ntawm tus nqi. Cov nyhuv ntawm ib qho aperture lens (tseem hu ua lub diaphragm lens) yog concentrated nyob ze ntawm lub voj aperture ntawm lub diaphragm. Lub axial hluav taws xob teb lub zog ntawm ob lub microscopes yog tas li. Ib lub voj voos aperture membrane tsis muaj txiaj ntsig zoo, tab sis feem ntau nws tuaj yeem siv los ua ib feem ntawm qee cov lo ntsiab muag nyuaj:
Lub hom phiaj immersion: Cov khoom emitting electrons yog immersed ncaj qha nyob rau hauv lub hluav taws xob teb ntawm no hom ntawm microscope, thaum lub axial muaj peev xwm ntawm lwm sab (piv txwv li cov duab sab) ntawm lub lens Nikon yog tas li. Tsuas yog rau qeb plaub, lwm yam peb hom hluav taws xob ua haujlwm lo ntsiab muag tuaj yeem suav tias yog lub tshuab tsom iav, thiab lawv cov khoom sab focal ntev thiab cov duab sab focal ntev tuaj yeem muab tau raws li. Cov qauv focal ntev rau thawj thiab thib ob hom lo ntsiab muag yog:
Nws tsis yog qhov nyuaj los ua pov thawj tias qhov ntev ntawm lub ntsej muag nyob rau hauv ib lub ntsej muag muaj peev xwm thiab lub ntsej muag immersion yog ib txwm zoo, uas txhais tau hais tias cov Nikon microscopes yeej ib txwm sib koom ua ke. Ib lub lens aperture tuaj yeem tsim lub lens diverging, thiab kev ua haujlwm ntawm lub hom phiaj immersion yuav tsum tau soj ntsuam raws li qhov xwm txheej tshwj xeeb. Ib qho piv txwv ntawm lub nruas yog cov phom hluav taws xob siv hauv Nikon microscopes thiab lwm cov kab hluav taws xob hluav taws xob. Nws txoj haujlwm yog tsim cov kab hluav taws xob nrog ib qho ntoo khaub lig-sectional shape thiab tam sim no siv.
