In order to reduce the obscuration, conical baffle of secondary mirror is ameliorated into a shutter one.

为了减小初始中心遮光比，将次镜锥状遮光罩改进为百叶窗式结构；

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In order to reduce the obscuration, conical baffle of secondary mirror is ameliorated into a shutter one.

为了减小初始中心遮光比，将次镜锥状遮光罩改进为百叶窗式结构；

youdao