| 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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| 引用本文： | 高郭鹏,熊望娥,甘玉泉,刘阳.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[J].应用光学,2009,30(4):575-579. |
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| 作者姓名： | 高郭鹏 熊望娥 甘玉泉 刘阳 |
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| 作者单位： | 1. 中国科学院,西安光学精密机械研究所,陕西,西安,710119;中国科学院,研究生院,北京,100039
2. 中国科学院,西安光学精密机械研究所,陕西,西安,710119 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 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1.082 3×10-12 W/m2和1.661 4×10-10 W/m2,相差二个数量级,证明改进的二级遮光罩优于一级遮光罩,能有效抑制杂散光.最后,设计了主、次镜间镜筒内壁上等高挡光环,进一步抑制了R-C系统的杂散光.
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| 关 键 词： | R-C系统 杂散光 遮光罩 挡光环 |
| 收稿时间： | 2009/2/6 |
Program design of outer baffle vanes and improvement of conical inner baffle in R-C system |
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| GAO Guo-peng,XIONG Wang-e,GAN Yu-quan,LIU Yang.Program design of outer baffle vanes and improvement of conical inner baffle in R-C system[J].Journal of Applied Optics,2009,30(4):575-579. |
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| Authors: | GAO Guo-peng XIONG Wang-e GAN Yu-quan LIU Yang |
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| Abstract: | The vertex coordinate formulas for outer baffle vanes of R-C system are deduced based on geometrography, and the vanes are designed with C-language program. The vertex coordinate formulas of inner baffle are also deduced after assuring the central obscuration ratio, and then the common one-grade conical baffle is improved into the two-grade one. The correctness of baffle design is proved by an example and its simulated analysis, meanwhile an effective way of suppressing the stray light is provided. Finally, the same-height vanes in drawtube between primary and secondary mirrors are designed for further suppressing the stray light in R-C system. |
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| Keywords: | R-C system stray light baffle vane |
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