Hauv kev tsim cov cuab yeej siv kho qhov muag, qhov tseeb ntawm cov iav tsom iav ncaj qha txiav txim siab qhov zoo ntawm cov duab. Txij li cov tsom iav astronomical mus rau cov cuab yeej microscopic, los ntawm cov koob yees duab siab kawg mus rau cov tshuab photolithography meej, qhov kev ua tau zoo tshaj plaws ntawm txhua lub cuab yeej kho qhov muag vam khom kev txhawb nqa ntawm cov iav tsom iav siab. Cov khoom siv granite precision, nrog nws cov yam ntxwv tsis sib xws, tab tom dhau los ua qhov tseem ceeb rau kev tsim cov platform sib tsoo iav siab, tsav kev tsim cov cuab yeej kho qhov muag mus rau qib tshiab ntawm qhov tseeb.
Cov txiaj ntsig zoo ntawm cov khoom siv granite precision
Granite tau tsim los ntawm cov txheej txheem geological ntau pua lab xyoo thiab muaj cov khoom tshwj xeeb, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim cov platform sib tsoo lens siab. Ua ntej, qhov coefficient ntawm thermal expansion ntawm granite yog qis heev, feem ntau yog li ntawm 5 txog 7 × 10⁻⁶ / ℃, thiab nws yuav luag tsis cuam tshuam los ntawm kev hloov pauv ntawm qhov kub thiab txias ib puag ncig. Thaum lub sijhawm sib tsoo lens, qhov kub uas tsim los ntawm kev ua haujlwm ntawm cov khoom siv lossis kev hloov pauv ntawm qhov kub thiab txias ib puag ncig yuav tsis ua rau muaj kev hloov pauv tseem ceeb ntawm lub platform sib tsoo granite, yog li ua kom ntseeg tau tias qhov tseeb ntawm cov lens tseem ruaj khov thoob plaws hauv kev sib tsoo thiab zam kev hloov pauv ntawm curvature ntawm cov lens los ntawm thermal expansion thiab contraction.
Qhov thib ob, granite muaj kev ua haujlwm zoo heev rau kev co. Kev sib tsoo lens optical xav tau ib puag ncig ua haujlwm ruaj khov heev. Txawm tias qhov kev co me me tuaj yeem ua rau muaj qhov tsis zoo ntawm qhov chaw ntawm lub lens. Granite tuaj yeem nqus tau lub zog sab nraud, txo qhov cuam tshuam ntawm kev co thaum lub sijhawm sib tsoo, txo qhov loj ntawm kev co los ntawm 60% txog 80%, xyuas kom meej qhov chaw sib piv ntawm cov cuab yeej sib tsoo thiab lub lens, thiab pab ua kom tiav qhov du ntawm qhov chaw ntawm lub lens.
Tsis tas li ntawd xwb, granite muaj qhov nyuaj siab thiab muaj zog hnav tsis kam, nrog Mohs hardness ntawm 6 txog 7. Hauv kev ua haujlwm ntev thiab siab zaus lens sib tsoo, granite sib tsoo platforms tsis yooj yim hnav thiab tsim kua muag, tuaj yeem tswj tau qhov tseeb ruaj khov, txuas lub neej kev pabcuam ntawm cov khoom siv, thiab txo cov nqi txij nkawm.
Kev siv tshuab ua tiav ntawm cov platform sib tsoo granite
Yuav kom siv tau qhov zoo ntawm granite, lub tshuab sib tsoo lens siab siv cov txheej txheem thev naus laus zis siab heev thaum lub sijhawm tsim khoom. Los ntawm kev tswj hwm tus lej ultra-precision sib tsoo thiab polishing thev naus laus zis, qhov chaw tiaj tus ntawm lub platform granite tuaj yeem tswj tau hauv ± 0.002mm / m, thiab qhov roughness ntawm qhov chaw tuaj yeem ncav cuag qib nanometer. Qhov zoo ntawm qhov chaw siab no muab qhov chaw siv tau zoo rau kev sib tsoo lens, kom ntseeg tau tias cov cuab yeej sib tsoo tuaj yeem ua cov lens sib npaug thiab ruaj khov.
Lub caij no, thaum tsim thiab tsim cov txheej txheem ntawm lub tshuab sib tsoo granite, cov qauv kho tshuab thiab cov txheej txheem txav mus los tau muab ua ke. Piv txwv li, los ntawm kev sib koom ua ke cov kev taw qhia cua siab thiab cov tshuab tsav servo motor, cov cuab yeej sib tsoo tuaj yeem ua tiav kev txav mus los du thiab meej ntawm lub platform, nrog qhov tseeb ntawm kev txav mus los ntawm ± 0.005 hli. Qhov kev tswj hwm kev txav mus los siab no, ua ke nrog kev ruaj khov ntawm lub platform granite, tuaj yeem ua tau raws li qhov xav tau ntawm kev sib tsoo ntawm cov nplaim nkhaus rau ntau hom lens. Txawm hais tias nws yog concave lens, convex lens, lossis aspheric lens, kev ua tiav siab tuaj yeem ua tiav.
Tus nqi lag luam ntawm cov khoom siv granite precision
Lub sijhawm tshaj tawm: Tsib Hlis-07-2025