Lub Cassegrain telescope yog lub tsom iav tsom iav uas muaj ob lub iav. Nws tau tsim los ntawm Cassegrain hauv xyoo 1672. Qhov loj dua yog hu ua daim iav thawj, thiab qhov me dua yog hu ua daim iav thib ob. Feem ntau ib lub qhov qhib nyob rau hauv nruab nrab ntawm daim iav loj, thiab cov duab yog tsim tom qab lub ntsiab daim iav. Nws focal point yog hu ua Cassegrain focal point. Qee zaum oblique dav hlau daim iav yog ntxiv raws li cov kab dotted hauv daim duab, thiab cov duab yog tsim rau sab. Qhov Cassegrain telescope no tseem hu ua Nesmus telescope.
[Disclaimer: Cov ntsiab lus saum toj no yog los ntawm Is Taws Nem, thiab tsis sawv cev rau qhov kev pom ntawm lub xaib no. Kuv vam tias qee cov ntsiab lus tuaj yeem pab koj. 】
Peb (Alice) yog cov chaw tsim khoom tshwj xeeb hauv kev tsim cov cim kho qhov muag, tsom mus rau kev pabcuam kev txhawb nqa rau kev lag luam rooj tog, kev lag luam machinery, hluav taws xob thiab hluav taws xob kev lag luam thiab lwm yam lag luam, feem ntau tsim zinc alloy, aluminium, stainless hlau, tooj liab, tooj dag, pvc Tos rau cov ntawv sib txawv.
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