Common Illumination Techniques nyob rau hauv Metallurgical Microscopy
① Direct Illumination: Lub teeb ci ncaj qha rau ntawm qhov khoom los tsim cov duab meej. Nws ua haujlwm zoo thaum xav tau qhov sib txawv siab. Txawm li cas los xij, thaum siv rau cov qauv ci ntsa iab lossis pom kev, qhov kev xav ntawm specular yuav tshwm sim.
② Darkfield Illumination: Lub teeb hits tus qauv nto ntawm lub kaum oblique. Oblique tawg lub teeb nkag mus rau lub hom phiaj, tsim cov yam ntxwv ci ntsa iab tiv thaiv keeb kwm yav dhau tsaus. Yog hais tias tus qauv nto tsis muaj xim sib txawv, nws tsis tuaj yeem raug qhov txawv ntawm qhov kho qhov muag. Ob hom kev teeb pom kev zoo no feem ntau yog nruab rau ntawm metallurgical microscopes.
③ Backlight Illumination: Uniform teeb ci los ntawm sab nraub qaum ntawm tus qauv. Lub microscope captures lub contour profile ntawm cov khoom. Backlight illumination yog siv los ntsuas qhov ntsuas qhov ntev thiab txiav txim siab kev taw qhia.
④ Diffuse Reflection Illumination: Nws muab lub teeb uas tsis yog kev taw qhia, zoo ib yam li lub teeb mos mos. Qhov teeb pom kev zoo no tsim nyog rau cov khoom muaj kev cuam tshuam zoo heev. Nws cov nyhuv zoo ib yam li cov mos mos, tsis muaj kev taw qhia lub teeb ntawm ib hnub overcast.
⑤ Coaxial Illumination: Lub teeb ci coaxial emits lub teeb raws txoj kab ntsug. Lub teeb hla dhau 45℃ib nrab daim iav thiab irradiates cov khoom vertically. Hom illumination no tshwj xeeb tshaj yog pab tau rau kev tshuaj xyuas qhov chaw muaj kev cuam tshuam zoo heev.
