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China develops large aperture optical mirror with high accuracy
In article ,
Jan Panteltje writes: China develops large aperture optical mirror with high accuracy http://chinaplus.cri.cn/photo/china/...22/173571.html Four-meter-diameter aspheric silicon carbide mirror is very impressive, though the story doesn't quantify the focal ratio, amount of asphere, or surface accuracy. Does anyone know these numbers or what the Chinese Academy of Science plans to use the mirror for? -- Help keep our newsgroup healthy; please don't feed the trolls. Steve Willner Phone 617-495-7123 Cambridge, MA 02138 USA |
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