R—C系统外遮光罩挡光环的程序化设计及锥状内遮光罩的改进

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基于几何作图法推导出R—C系统外遮光罩内挡光环顶点的坐标公式,利用C语言编程实现程序化设计挡光环。在中心遮光比确定的情况下,推导出内遮光罩的顶点坐标公式,并将通常使用的主镜一级锥状遮光罩改进为二级锥状遮光罩,以高速摄影系统的R—C型折反式主物镜为例,对其主镜和次镜内遮光罩进行设计,并给出设计结果。当轴角为70°,遮光罩为二级和一级时,到达像面的杂散光照度分别为1.0823×10^-12W/m^2和1.6614×10^-10W/m^2,相差二个数量级,证明改进的二级遮光罩优于一
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