Txheem Calibration Txheej Txheem rau Polarizers hauv Polarizing Microscopes
Hauv kev ua haujlwm zoo, cov kev taw qhia kev vibration ntawm sab sauv thiab qis polarizing tsom iav ntawm polarizing microscope yuav tsum yog orthogonal rau ib leeg, los yog sab hnub tuaj -west lossis sab qaum teb- sab qab teb, thiab txhua tus yuav tsum ua raws li kab rov tav thiab ntsug ntawm crosshair ntawm lub eyepiece. Qee lub sij hawm tsuas yog ib qho qis polarizer yog siv rau kev soj ntsuam, thiab kev co kev taw qhia ntawm lub polarizer qis yuav tsum tau txiav txim siab, yog li cov polarizer yuav tsum tau ntsuas thaum ua haujlwm.
1. Kev kuaj pom ntawm cov plaub hau hauv eyepiece
Tshawb xyuas seb lub ntsej muag ntawm lub ntsej muag puas yog orthogonal thiab seb nws puas ua raws li cov kev taw qhia kev vibration ntawm daim iav sab sauv thiab sab qis. Ib txhij xaiv ib daim ntawm biotite nrog tsis tshua muaj cleavage, txav mus rau hauv nruab nrab ntawm lub crosshair ntawm lub eyepiece, dlhos lub cleavage seam thaum uas tig mus rau ib tug ntawm cov crosshairs, sau cov scale naj npawb ntawm cov theem, thiab ces tig lub theem ua rau lub cleavage seam parallel mus rau lwm crosshair, sau cov scale naj npawb ntawm cov theem. Qhov sib txawv ntawm ob qhov ntsuas qhov ntsuas yog 90 degree, qhia tias cov plaub hau yog orthogonal.
2. Kev txiav txim siab thiab kho qhov kev vibration ntawm daim iav polarizing
Yog vim li cas siv biotite los xyuas qhov kev vibration ntawm polarizer yog tias biotite yog cov pob tshab pob tshab uas muaj cov yam ntxwv zoo nyob rau hauv ib qho polarization. Ua ntej, nrhiav ib qho ntshiab thiab cleaved piece ntawm biotite, txav nws mus rau hauv nruab nrab ntawm lub crosshair ntawm lub eyepiece, thawb tawm lub sab sauv polarizer, tig lub theem ib zaug, thiab saib cov xim hloov ntawm biotite. Vim tias biotite absorbs lub teeb vibration nyob rau hauv cov kev taw qhia cleavage muaj zog, thaum cov xim biotite nce mus txog nws qhov tob tshaj plaws, cov kev taw qhia ntawm cleavage seam yog cov kev taw qhia kev co ntawm lub polarizer qis.
3. Kho ntawm orthogonal polarization ntawm sab sauv thiab qis polarizing iav
Tom qab ua raws cov kev taw qhia ntawm lub polarizer qis, tshem tawm cov zaj duab xis nyias thiab thawb nws mus rau sab sauv polarizer saib seb qhov chaw saib puas yog dub, uas yog, txawm tias nws yog nyob rau hauv lub xeev extinction. Yog tias nws yog tag nrho cov xim dub, nws qhia tau hais tias kev vibration ntawm sab sauv thiab sab polarizations yog orthogonal rau ib leeg. Txwv tsis pub, lub sab sauv polarizer yuav tsum tau calibrated los ntawm rotating nws kom txog rau thaum lub teb ntawm kev pom yuav tsaus. Thaum rotating, nres ntsia hlau ntawm lub polarizer sab sauv yuav tsum tau loosened ua ntej, calibrated kom raug, thiab ces nruj.
