Dab tsi yog cov compound lub tsom tsom?
Lub tshuab tsom me yog qhov ntsuas muaj cov ntsiab lus ntawm cov lo ntsiab muag nrog cov haujlwm sib txawv thiab cov tshuab lub cev ntawm lub tsom iav. Nws tuaj yeem tsim cov duab dav ntawm cov khoom pom, ua rau nws yooj yim saib. Feem ntau nws yog siv los saib cov khoom me me thiab microstructures uas tsis tuaj yeem pom ncaj qha ntawm lub qhov muag. Feem ntau hais lus, microscopes tuaj yeem faib ua optical microscopes thiab electron microscopes raws li cov chaw sib txawv thiab cov roj teeb. Tsuas yog muab tso tawm, kho qhov muag tau siv lub teeb pom kev zoo li lub teeb ci, uas yog tsom los ntawm kev kho qhov muag (iav) lens los ua ib daim duab khoom rau kev soj ntsuam. Muaj ob hom microscopes: cov me me tsom iav thiab cov duab sib txuas. Kev siv hluav taws xob siv hluav taws xob yuav siv ib lub teeb tsis tshua muaj lub teeb ci ntsa iab raws li lub teeb ci, uas tau tsom los ntawm lub tshuab hluav taws xob hluav taws xob hauv lub ntsej muag cov khoom me me. Tam sim no, cov kev siv uas nquag muaj xws li scanning Electron tsom thiab xa hluav taws xob tsom iav.
Lub teeb tsom iav, suav nrog LM. Raws li cov txheej txheem kev xav thiab kev sib txawv ntawm kev tsim kho ntawm Optical tsom iav, lawv tuaj yeem faib ua ob pawg: cov ntawv me me thiab cov duab tsom iav yooj yim.
1. Yooj yim
Lub tshuab siv yooj yim yog tsim ntawm ib lossis ib txheej lo ntsiab muag zoo (phiaj xwm convex lossis biconvox lo ntsiab muag). Qhov tsom iav no muaj qhov ntev focal ntev, thiab thaum kev soj ntsuam, yuav tsum ze rau lub lens, thiab lub lens tseem yuav tsum tau ze rau cov khoom. Cov duab ua los ntawm lub tshuab siv yooj yim yog qhov cuam tshuam rau kev ntxeev siab thiab distortion, yog li cov magnification qis dua 20 zaug. Cov iav ua haujlwm nquag siv yog ib hom tsom iav.
2. Compound Microscope
Lub tshuab tsom iav ua ke yog tsim ntawm ob lossis ob teev lub ntsiab muag thiab lub cev siv tshuab, thiab yog cov cuab yeej siv feem ntau siv nyob rau hauv cov tshuaj ntsuam biological. Nws tseem yog lub tshuab tsom peb nco qab. Lub tshuab tsom iav no muaj ob lub lo ntsiab muag, ib qho yog lub lens uas tau pom, hu ua lub peev txheej, hu ua lub hom phiaj, thiab lwm lub ntsiab muag yog qhov muag pom, hu ua lub qhov muag lossis tsuas yog lub lens. Vim lawv cov laj thawj sib txawv thiab cov hom phiaj sib txawv, cov microscopes, sib xyaw ua ke microscopes tuaj yeem muab faib ua cov paib (anatomical microscopes) thiab dog dig kho qhov muag microscopes.
a. Cov stereoscopic (anatomical) tsom iav
Cov ntsuas tsomcocopic feem ntau yog siv los soj ntsuam cov morphology sab nraud ntawm opaque khoom lossis cov tshuaj lom neeg, lossis siv cov kab muaj kev lag luam thiab qee qhov biomedical thev naus laus zis. Qhov tsom iav no tau muaj kev daws teeb meem zoo dua vim muaj qhov cuam tshuam ntawm lub teeb, qhov tob ntawm daim teb, thiab lwm yam kev xav ntawm tsawg dua 60 zaug.
