Hauv cov teb ntawm kev sim kho qhov muag precision thiab kev tsim khoom siab, kev ruaj khov ntawm lub kaum sab xis ntawm qib 0.01μrad yog qhov qhia tseem ceeb. Granite optical platforms, nrog lawv cov khoom siv thiab kev sib koom tes thev naus laus zis, tau dhau los ua tus neeg nqa khoom tseem ceeb rau kev ua tiav qhov tseeb siab heev.
Cov txiaj ntsig ntawm cov ntaub ntawv ua rau lub hauv paus ruaj khov. Granite, ua pob zeb igneous tsim los ntawm geology ntau pua lab xyoo, yog lub npe nrov rau nws cov coefficient qis heev ntawm thermal expansion, uas tsuas yog ib nrab ntawm cov hlau thiab ib feem plaub ntawm cov txhuas. Thaum qhov kub hloov pauv los ntawm 1 ℃, 1-meter-ntev granite Cheebtsam nthuav dav los ntawm 6 micrometers, thaum cov txhuas Cheebtsam nthuav dav los ntawm 23 micrometers. Qhov no zoo zam qhov kev hloov pauv angular los ntawm thermal deformation. Lub caij no, nws cov kev ua tau zoo damping tuaj yeem ua rau cov kev co sab nraud sai sai, ua kom lub platform nyob rau hauv lub xeev static thiab txo cov kev cuam tshuam nrog cov khoom siv kho qhov muag.
Qhov kev tsim qauv zoo meej ua rau muaj kev ruaj khov. Lub platform granite optical, tom qab kev tsim qauv kho tshuab zoo tshaj plaws, tau txhim kho kev ruaj khov thiab tuaj yeem tiv taus qhov deformation ntawm cov khoom thauj. Nws qhov kev ua tiav ntawm qhov chaw ncav cuag qib siab tshaj plaws hauv kev lag luam. Piv txwv li, siv qhov tseeb ntawm 00 uas ua tau raws li tus qauv GB4987-85, qhov kev kam rau siab tsuas yog 2 × (1 + d / 1000) μm (d yog qhov ntev ntawm kab pheeb ces kaum), muab qhov kev siv rau kev teeb tsa tiaj tus rau cov khoom siv kho qhov muag.
Kev ntsuas dynamic yog ua tiav los ntawm kev koom tes thev naus laus zis. Thaum nruab nrog cov txheej txheem cais kev co siab heev xws li cov cua caij nplooj ntoos hlav lossis cov hlau nplaum sib nqus, lub platform granite tuaj yeem cais cov kev co qis thiab siab zaus. Ntxiv nrog rau cov khoom siv ntsuas qhov tseeb siab xws li laser interferometers, qhov kev hloov pauv ntawm lub kaum sab xis raug saib xyuas lub sijhawm tiag tiag. Thaum qhov kev hloov pauv tshaj qhov txwv ntawm 0.01μrad, lub kaw lus tswj kev tawm tswv yim tam sim ntawd tsav lub tshuab kho kom zoo rau kev kho kom ntseeg tau tias lub platform ib txwm nyob hauv qhov tseeb siab thiab ruaj khov.
Txij li qhov tseem ceeb ntawm cov khoom siv mus rau kev txhawb nqa thev naus laus zis, lub platform granite optical, nrog rau kev ruaj khov thermal, kev tiv thaiv kev co thiab kev ua tiav qhov zoo li nws lub hauv paus, ua ke nrog kev tswj hwm ntse, tau ua tiav dhau los ntawm 0.01μrad precision threshold thiab siv dav hauv cov teb txiav xws li photolithography, kev soj ntsuam astronomical thiab kev ntsuas laser, txhawb kev tshawb fawb thiab kev tsim khoom ntawm cov khoom siv high-precision mus rau qhov siab tshiab.
Lub sijhawm tshaj tawm: Tsib Hlis-23-2025