Kev tshawb nrhiav kev vam meej ntawm kev faib ntawm daim iav tseem ceeb ntawm lub tsom iav raj thiab kev ua cov duab ntawm cov iav sub
Lub aspheric lub ntsiab daim iav ntawm optical telescope txais kev tsim ntawm ntau yam sub-mirrors splicing, uas tuaj yeem tawg los ntawm qhov txwv aperture. Lub hood yog launched rau hauv qhov chaw. Raws li Gauss theorem egregium, qhov chaw aspheric tsis tuaj yeem muab faib ua hexagons nrog tib lub cev thiab thaj chaw sib npaug, thiab qhov sib txawv ntawm cov duab thiab qhov zoo ntawm cov iav sub-daim iav muaj qhov cuam tshuam ntau dua rau cov qauv kev txhawb nqa thiab qhov tseeb ntawm daim iav nto. Yog li ntawd, kev faib ntawm cov iav tsom iav tsis tsuas yog cuam tshuam nrog cov kev xav ntawm cov iav tsom iav, tab sis kuj yog ib qho teeb meem engineering hauv kev tsim kho cov tsom iav zoo li no.
Tsis ntev los no, pab pawg ntawm Zheng Yi, tus kws tshawb fawb sib koom ua ke ntawm Nanjing Institute of Astronomical Optical Technology, National Astronomical Observatory ntawm Suav Academy ntawm Kev Tshawb Fawb, tau npaj ib txoj hauv kev rau thawj daim iav segmentation siv daim ntawv qhia kev sib hloov. Cov txiaj ntsig kev tshawb fawb muaj feem xyuam yog hu ua Thawj daim iav segmentation rau loj optical telescopes: ib qho kev sib hloov daim duab qhia kev mus kom ze. Tshaj tawm hauv Applied Optics. Txoj kev tshawb no tshuaj xyuas lub hauv paus daim iav curvature ntawm uas twb muaj lawm thiab nyob rau hauv-tsim optical telescopes thiab ib tug xov tooj cua telescopes, thiab qhia 8 division specifications ntawm lub dav hlau, cone, lub tog raj kheej thiab Goldberg polyhedron thiab lawv qhov sib thooj ntawm qhov chaw. Cov kev tshawb fawb tau pom tias qhov curvature ntawm thawj daim iav ntawm optical telescopes yog tsawg dua π / 6, uas yog haum rau kev faib txoj kev ntawm qhov projection los ntawm lub dav hlau mus rau nkhaus.
Cov kev tshawb fawb tau tshwm sim los ntawm daim ntawv qhia qhov projection, uas kos cov duab hauv lub ntiaj teb mus rau hauv daim ntawv qhia tiaj tus, uas yog ib qho teeb meem thaum ub hauv keeb kwm ntawm tib neeg kev tshawb fawb thiab kev tsim technology. Nyob rau lub hauv paus no, cov kws tshawb fawb tau tsim qhov rov qab qhov projection algorithm thiab ua tiav cov kev kawm hauv qab no: "conformal reverse projection", lub hexagon tau los ntawm kev faib deviates qhov tsawg tshaj plaws ntawm cov hexagon li niaj zaus; "kev sib npaug cheeb tsam rov qab projection", qhov zoo ntawm qhov tau txais daim iav yog sib npaug; "Kev sib npaug ntawm txoj kab uas hla rov qab qhov projection", qhov tau txais daim iav hla lub voj voog yog qhov tsawg tshaj plaws, yog li txuag cov khoom siv iav kim tshaj plaws. Txoj kev tshawb no qhia tias "qhov tsis sib xws ntawm daim iav duab" thiab "qhov sib txawv ntawm thaj tsam ntawm daim iav" yog qhov tseem ceeb rau kev faib, thiab tom qab ntawd cov txheej txheem kev kwv yees dav dav tau thov, uas tuaj yeem tau txais qhov sib npaug ntawm qhov sib faib. txhua qhov ntsuas los ntawm kev kho qhov hnyav. Kev ntsuam xyuas nrog peb caug-meter telescope li ib yam khoom txheeb xyuas qhov ua tau zoo ntawm txoj kev (Fig. 2).
Pab neeg tshawb fawb tau koom tes nrog "Peb caug Meter Telescope", tau ua tiav cov duab ntawm daim iav nrog cov duab tsis zoo thiab cov kev sib cuam tshuam tom qab faib, ua cov kev sim ntawm CNC tsib-axis machining tshuab loj, thiab ua tiav kev tsim kho. ntawm No. 63 sub-mirror of the Thirty Meter Telescope. Cov kev ua tiav thiab kev xeem tau raug lees paub los ntawm pab pawg kho qhov muag ntawm Peb caug Meter Telescope.
