内掩式透射地基日冕仪中杂光鬼像的消除

卜和阳; 卢振武; 张红鑫; 孙明哲

doi:10.3788/CO.20130602.0231

内掩式透射地基日冕仪中杂光鬼像的消除

doi: 10.3788/CO.20130602.0231

卜和阳^1,2,
卢振武^1, ,,
张红鑫¹,
孙明哲^1,2

1.
中国科学院长春光学精密机械与物理研究所光电技术研发中心,吉林长春 130033;
2.
中国科学院大学,北京 100049

基金项目:

国家863高技术研究发展计划资助项目(No.2011AA7033035B);空间科学预先研究资助项目(No.XDA04071800)

详细信息

作者简介:
卜和阳(1984—),男,吉林长春人,硕士研究生,2008年于华中科技大学获得学士学位,2008年至2009年工作于海信宽带多媒体技术公司,主要从事杂散光分析等方面的研究。E-mail:bhy0125@126.com;卢振武(1955—),男,吉林长春人,研究员,博士生导师,1982年于东北师范大学获得学士学位,1985年于中国科学院长春光学精密机械与物理研究所获得硕士学位。主要从事光学的应用基础研究、光学设计、衍射光学等方面的工作。E-mail:luzw@ciomp.ac.cn

卜和阳(1984—),男,吉林长春人,硕士研究生,2008年于华中科技大学获得学士学位,2008年至2009年工作于海信宽带多媒体技术公司,主要从事杂散光分析等方面的研究。E-mail:bhy0125@126.com;卢振武(1955—),男,吉林长春人,研究员,博士生导师,1982年于东北师范大学获得学士学位,1985年于中国科学院长春光学精密机械与物理研究所获得硕士学位。主要从事光学的应用基础研究、光学设计、衍射光学等方面的工作。E-mail:luzw@ciomp.ac.cn

通讯作者:
卢振武, E-mail:luzw@ciomp.ac.cn

中图分类号: TH754;TH751
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出版历程
- 收稿日期: 2012-12-15
- 修回日期: 2013-02-16
- 刊出日期: 2013-04-10

Suppresion of stray light ghost image in internally occulting refractive ground-based coronagraph

1.
Opto-electronics Technology Center, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

More Information

Corresponding author: LU Zhen-wu

摘要

摘要: 为了消除杂散光对日冕仪成像质量的影响,分析了工作波段为530～555 nm的内掩式透射地基日冕仪(其视场为1.1～3R⊙,分辨率为13.5 m,口径为120 mm,系统F数为8.2)物镜的多次反射形成的鬼像。基于鬼像形成原理,完成建模模拟,提出了结构性遮拦措施,并通过实验论证了遮拦结构对鬼像有良好的遮拦效果,同时验证了鬼像的光强和物镜边缘衍射光基本一致。实验还显示:鬼像的尺寸和模拟基本一致,直径均约为0.9 mm。消除鬼像后,内掩式透射日冕仪消杂光能力和成像质量进一步提高,实现了对日冕的有效观测。
- 内掩式透射地基日冕仪 /
- 鬼像 /
- 杂散光 /
- 结构遮拦
Abstract: In order to improve the imaging quality of coronagraphs, the ghost image caused by multi-reflection light from an objective lens for the internally occulting refractive ground-based coronagraph is analyzed at a band from 530 nm to 555 nm. The coronagraph with an aperture of 120 nm shows its main specifications in a field of view of 1.1 to 3R⊙, a resolution of 13.5 m, and F number of 8.2. The paper analyzes its imaging theory and establishes a model for the ghost image. Then, it presents the structure masking measures and performs an experimental demonstration. The experiment result shows that the masking structure is effective on the elimination of ghost image. In addition, the intensity of ghost image and the intensity of diffracted light of objective lens edge are basically the same. The experiment also illuminates that the size of ghost image is the same as the simulation result of 0.9 mm.The ghost image suppressing further improves the capability of elimination of stray light and the image quality of the coronagraph achieves the effective observation of the solar corona.
- internally occulting refractive ground-based coronagraph /
- ghost image /
- stray light /
- structure masking

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