Yog qhov kev hloov pauv ntawm qhov ntsuas qhov ntsuas kub thiab qhov kub thiab txias 0.0004 ib degree nce
Kub kho ntawm refractive index
Feem ntau hais lus, thaum kub nce los ntawm ib tug degree, qhov refractive index ntawm cov kua organic tebchaw txo los ntawm 3.5 × 10-4-5.5 × 10-4. Qee cov kua dej, tshwj xeeb tshaj yog thaum qhov ntsuas kub ntawm qhov ntsuas qhov ntsuas qhov ntsuas yuav tsum tau txiav txim siab yog nyob ze rau nws qhov kub kub, muaj qhov ntsuas kub txog li 7 × 10-4. Nyob rau hauv kev ua hauj lwm, lub refractive index ntsuas ntawm ib tug kub yog feem ntau hloov mus rau hauv lub refractive index ntawm lwm kub. Rau kev yooj yim ntawm kev xam, 4.5 feem ntau yog siv × 10-4 raws li qhov kub thiab txias hloov tas li. Kev suav ntxhib yuav ua rau muaj qhov yuam kev me ntsis, tab sis nws muaj qhov siv tau. Nyob rau hauv lwm yam lus, lub refractive index txo nrog qhov nce ntawm qhov kub thiab txias, thiab rau txhua txhua 1 degree hloov nyob rau hauv Celsius kub, lub refractive index hloov los ntawm kwv yees li ntawm 0.00045. Peb tuaj yeem xam qhov ntsuas qhov ntsuas qhov ntsuas tau raug kho rau 20 degree siv cov qauv hauv qab no: nD (t)=nD (20) -0.00045 (t-20 degree)
Ntawm lawv, nD (t) yog qhov ntsuas qhov ntsuas tsis pom kev ntsuas qhov ntsuas kub t. Qhov no qhia tau hais tias thaum qhov kev sim ntsuas kub siab tshaj 20 degree, nD (20) loj dua nD (t); Thaum qhov ntsuas kub qis dua 20 degree, nD (20) me dua nD (t).
Piv txwv: Muab nD (t)=1.3667, t=25.2 degree , xam nD (20).
ND (t)=nD (20) -0.00045 (t-20 degree)
ND (20)=1.3667 ntxiv rau 0.00045 (25.2 degree -20 degree )
{{0}}.3667 ntxiv rau 0.00045 × tsib taw tes ob
=1.36904
Cov xwm txheej cuam tshuam rau qhov ntsuas qhov ntsuas
Qhov cuam tshuam ntawm Lub Teeb Wavelength
Lub refractive index ntawm ib yam khoom sib txawv nyob ntawm seb lub wavelength ntawm lub teeb, nrog ntev wavelengths muaj qis refractive indices thiab luv wavelengths muaj ntau dua refractive indices. Lub sij hawm ntsuas qhov chaw feem ntau yog lub teeb dawb. Thaum lub teeb dawb ua rau refraction los ntawm prism thiab cov qauv kev daws teeb meem, qhov degree ntawm refraction txawv vim qhov sib txawv wavelengths ntawm txhua lub teeb xim. Tom qab refraction, nws decomposes rau hauv ntau lub teeb xim, uas yog hu ua dispersion. Lub dispersion ntawm lub teeb tuaj yeem plam thaj tsam ntawm lub teeb thiab tsaus ntuj ntawm qhov pom, ua rau kev ntsuas yuam kev. Txhawm rau kom tshem tawm cov dispersion, lub dispersion compensator yog ntsia rau ntawm qhov kawg ntawm qhov kev soj ntsuam lub lens raj ntawm Abbe refractometer.
Qhov cuam tshuam ntawm qhov kub thiab txias
Lub refractive index ntawm cov tshuaj hloov nrog kub, thiab raws li qhov kub thiab txias, qhov refractive index txo; Lub refractive index nce raws li qhov kub thiab txias. Qhov ntsuas ntawm lub refractometer yog engraved ntawm tus qauv kub ntawm 20 degree, yog li nws yog qhov zoo tshaj los ntsuas qhov ntsuas qhov ntsuas ntawm 20 degree. Txwv tsis pub, kev kho qhov kub thiab txias yuav tsum tau ua ntawm qhov ntsuas ntsuas. Thaum qhov kub siab tshaj 20 degree, ntxiv tus lej zoo; Thaum nws qis dua 20 degree, rho tawm tus lej kho.
