Txoj cai thiab kev siv ntawm refractometer
Thaum siv qhov nruab nrab ruaj khov, muaj kev sib raug zoo ua haujlwm yooj yim ntawm lub kaum ntse ntse refractive rc thiab qhov ntsuas qhov taw qhia. Beijing Million Electronics tshwj xeeb hauv kev tsim Abbe refractometers (xws li handheld refractometers, handheld refractometers, handheld qab zib meters, handheld salinity meters, qab zib refractometers, qab zib ntsuas, cawv ntsuas, refractometers, freezing point meters, concentration meters, salinity meters, cawv roj teeb refractometers. , qab zib meters, emulsion concentration meters, txiav kua concentration meters, refractometers) Abbe refractometers yog tsim los raws li txoj cai no.
Nws cov khoom tseem ceeb yog ob txoj cai kaum sab xis PI, PII. Muaj qhov sib txawv ntawm kwv yees li ntawm {{0}}.1 txog 0.15mm ntawm qhov ntxhib saum npoo ntawm prism PI thiab lub dav hlau kho qhov muag daim iav AD ntawm PII, uas yog siv los tuav cov kua mus kuaj thiab nteg ib nyias txheej ntawm PI thiab PII. Tom qab lub teeb nkag mus rau lub prism PI los ntawm lub reflector, nws diffuses vim lub ntxhib av iav nto, dhau los ntawm cov kua ntsuas los ntawm ntau lub kaum sab xis los ntawm qhov khoob; Nkag mus rau prism PII, raws li yav tas los paub, lub teeb rays nkag mus rau lub prism PII los ntawm tag nrho cov kev taw qhia yog refracted, thiab lawv cov kaum sab xis refractive poob nyob rau hauv lub tseem ceeb lub kaum sab xis rc (vim hais tias lub refractive index ntawm lub prism yog ntau dua li cov kua, tag nrho cov teeb. rays los ntawm mus rau refracted los ntawm lub prism). Lub teeb nrog lub kaum sab xis tseem ceeb ntawm rc dhau los ntawm prism PII thiab raug coj mus rau qhov muag. Yog hais tias lub crosshair ntawm lub eyepiece yog hloov mus rau qhov tsim nyog txoj hauj lwm, lub sab sauv ib nrab ntawm lub eyepiece yuav pom.
Los ntawm cov hauv paus ntsiab lus ntawm geometric optics, nws tuaj yeem ua pov thawj tias qhov ntsuas qhov cuam tshuam ntawm cov kua hauv qhov sib txawv, n kua, thiab kev sib raug zoo ntawm qhov ntsuas qhov ntsuas thiab qhov ntsuas qhov ntsuas ntawm cov kua hauv qhov sib txawv yog: n kua {{0} }sinB B, uas yog qhov tsis tu ncua rau qee qhov prism, thiab n prism kuj yog qhov tsis tu ncua ntawm qhov kub thiab txias. Yog li lub refractive index n ntawm cov kua yog ib tug muaj nuj nqi ntawm lub kaum sab xis r. Lub refractive index ntawm cov kua tuaj yeem suav nrog RC. Kev nyeem ntawv rc tau hloov mus rau tus nqi ntawm n kua ntawm lub refractometer, thiab tus nqi ntawm n kua tuaj yeem nyeem ncaj qha. Nyob rau hauv cov xwm txheej tshwj xeeb, qhov ntsuas qhov ntsuas ntawm cov kua dej sib txawv nyob ntawm qhov wavelength ntawm lub teeb monochromatic siv. Yog tias lub teeb dawb zoo tib yam siv los ua lub teeb pom kev zoo, cov xim muaj xim lub teeb yuav tshwm sim ntawm lub teeb tsaus nti vim kev tawg, ua rau lub teeb tsaus nti tsis meej. Txhawm rau siv lub teeb dawb ua lub teeb ci, qhov ntsuas kuj tseem nruab nrog ob lub "Amixi" prisms uas muaj peb lub prisms txhua qhov nyiaj them prisms (lub sab sauv "Amixi" prism tuaj yeem tig), thiab lawv cov txheeb ze txoj haujlwm tuaj yeem hloov kho. Thaum lub teeb pom kev zoo, lub teeb tawg los ntawm lub teeb refracting hauv qab no tuaj yeem tig rov qab mus rau hauv lub teeb dawb, tshem tawm cov xim bands thiab ua rau lub teeb tsaus nti pom tseeb. Nyob rau ntawm lub sijhawm no, qhov ntsuas qhov ntsuas tsis zoo ntsuas nrog lub teeb dawb yog sib npaug rau qhov ntsuas ntsuas qhov ntsuas nD ntsuas nrog sodium lub teeb D-kab (nruab nrab 5890 tus neeg).
Lub refractive index yog ib qho ntawm cov yam ntxwv tsis tu ncua ntawm cov teeb meem, thiab nws cov nqi muaj feem xyuam rau qhov kub, siab, thiab lub wavelength ntawm lub teeb ci. Lub cim hais txog qhov ntsuas qhov ntsuas ntawm cov khoom siv thaum siv sodium lub teeb D-kab ua lub teeb ci. Qhov kub thiab txias muaj qhov cuam tshuam rau refractive index. Feem ntau cov kua organic tshuaj muaj qhov txo qis hauv qhov ntsuas qhov ntsuas kub thaum qhov kub nce, thaum kev sib raug zoo ntawm qhov ntsuas qhov ntsuas ntawm cov khib nyiab thiab qhov kub thiab txias yog qhov tsis sib xws thiab feem ntau tsis tshaj. Feem ntau, cov kev hloov hauv atmospheric siab muaj me ntsis cuam tshuam rau tus lej tus nqi ntawm refractive index, yog li lub zog ntawm lub siab tsuas yog txiav txim siab hauv kev ua haujlwm meej heev.
