大视场日冕仪光学系统杂散光抑制
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摘要
大视场日冕仪主要用来对215倍太阳半径内的日冕进行全周向观测以监测太阳活动并对影响日地空间的灾害性空间天气进行预警。根据杂散光抑制要求,将大视场日冕仪的光学系统设计成外掩透射式二次成像结构,其光学系统长度为355.89 mm,视场为±20°,焦距为40 mm。将大视场日冕仪杂散光按照光强分为三级,其中一级为太阳直射光,二级为外掩体和外窗口边缘的衍射光,三级为内掩体表面反射光、物镜口径边缘的衍射光和散射杂散光。对这三级杂散光分别进行抑制后得到内视场的杂散光抑制水平为10-9量级,外视场的杂散光抑制水平为10-13量级。
The large field of view coronagraph is used to image the corona within 215 solar radii. This coronagraph can be used to monitor the solar activity and forecast the violent space weather events. For the need of the stray light suppression, the coronagraph is designed to be an external occulted and secondary imaging system. The optical system has a length of 355.89 mm, a field of view of ± 20° and a focal length of 40 mm. The stray light of the coronagraph is divided into three levels by the intensity. The first level is the direct light from the sun. The second level is the diffracted light from the occulter and external diaphragm. The third level is the reflected light from the inner occulter, the diffracted light from the objective aperture and the scatted light. The three levels of stray light are suppressed respectively. Finally, the stray light level of the coronagraph is 10-9at the inner field and 10-13at the outer field.
The large field of view coronagraph is used to image the corona within 215 solar radii. This coronagraph can be used to monitor the solar activity and forecast the violent space weather events. For the need of the stray light suppression, the coronagraph is designed to be an external occulted and secondary imaging system. The optical system has a length of 355.89 mm, a field of view of ± 20° and a focal length of 40 mm. The stray light of the coronagraph is divided into three levels by the intensity. The first level is the direct light from the sun. The second level is the diffracted light from the occulter and external diaphragm. The third level is the reflected light from the inner occulter, the diffracted light from the objective aperture and the scatted light. The three levels of stray light are suppressed respectively. Finally, the stray light level of the coronagraph is 10-9at the inner field and 10-13at the outer field.
引文
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22 Yang Jiaqiang,Cheng Dewen,Wang Qingfeng,et al..Design of a novel wide view-field angle and anti-stray-light fundus camera[J].Acta Optica Sinica,2012,32(11):1122002.杨加强,程德文,王庆丰,等.新型大视场消杂光眼底相机光学系统的设计[J].光学学报,2012,32(11):1122002.
23 Lu Tianxiong,Bai Jian,Huang Zhi,et al..Stray light analysis and suppression of panoramic annular lens[J].Acta Optica Sinica,2013,33(5):0511003.鲁天雄,白剑,黄治,等.全景环带成像系统的杂散光分析及抑制[J].光学学报,2013,33(5):0511003.
24 Liu Wendong,Yang Bo.Lens-hood design of starlight semi-physical experimental platform[J].Laser&Optoelectronics Progress,2012,49(9):092203.刘文东,杨博.星光半物理实验平台遮光罩设计新方法[J].激光与光电子学进展,2012,49(9):092203.
25 Bian Wenbin,Gao Sitian,Lu Rongsheng,et al..Analysis of optical characters of confocal Fabry-Pérot interference microscopy probe[J].Laser&Optoelectronics Progress,2012,49(5):051203.边文宾,高思田,卢荣胜,等.共焦法布里珀罗干涉显微测头光学特性分析[J].激光与光电子学进展,2012,49(5):051203.
26 Wang Xiaokun.Fabrication and testing of large aperture off-axis SiC aspheric mirror[J].Laser&Optoelectronics Progress,2012,49(1):011201.王孝坤.大口径离轴碳化硅非球面反射镜加工与检测技术研究[J].激光与光电子学进展,2012,49(1):011201.
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2 J P Byrne,S A Maloney,R T J Mcateer,et al..Propagation of an Earth-directed coronal mass ejection in three dimensions[J].Nat Commun,2010,1:74.
3 N Srivastava,P Venkatakrishnan.Relation between CME speed and geomagnetic storm intensity[J].Geophysical Research Letters,2002,29(9):1-1~1-4.
4 Zhao Haibin,Lin Qisheng,Chen Yiping,et al..Coronal structure and brightness profile of the total solar eclipse on August 1,2008[J].Chinese Sci Bull,2009,54(12):1790-1792.赵海斌,林启生,陈一平,等.2008年8月1日日全食的日冕结构和亮度分布[J].科学通报,2009,54(12):1790-1792.
5 Hu Zhongwei.Total solar eclipse:observation and research of solar corona[J].Chinese Journal of Nature,2009,31(5):258 -261.胡中为.日全食——日冕的观测研究[J].自然杂志,2009,31(5):258-261.
6 Gao Pengxin,Li Kejun.Statistical properties of coronal mass ejections[J].Progress in Astronomy,2008,26(2):115-125.高朋鑫,李可军.日冕物质抛射基本物理参数的统计特征[J].天文学进展,2008,26(2):115-125.
7 Song Limin,Zhang Jun,Yang Zhiliang,et al..Earth-directed coronal mass ejection[J].Progress in Astronomy,2002,20(1):33 -44.宋丽敏,张军,杨志良,等.对地日冕物质抛射研究[J].天文学进展,2002,20(1):33-44.
8 Wang Shui.Coronal mass ejections and space weather[J].China Basic Science,2000,4:12-15.王水.日冕物质抛射与空间天气学[J].中国基础科学,2000,4:12-15.
9 L Lanzerotti.Space Weather effect on technologies[J].Space Weather,Geophys Monogr Ser,2011,125:11-22.
10 J W Evans.A photometer for measurement of sky brightness near the Sun[J].J Opt Soc Am,1948,38,1083-1085.
11 R Tousey.Observations of the white light corona by rocket[J].Ann Astrophys,1965,28.600-604.
12 M J Koomen,C R Detwiler,G E Brueckner,et al..White light coronagraph in OSO-7[J].Appl Opt,1975,14(3):743-751.
13 R M Macqueen,J T Gosling,R H Munro,et al..The high altitude observatory white light coronagraph[C].SPIE,1974,44:207-212.
14 R M Macqueen,A Csoeke-Poechk,E Hildner,et al..The high altitude observatory coronagraph/polarimeter on the solar maximum mission[J].Sol Phys,1980,65(1):91-107.
15 G E Brueckner,R A Howard,M J Koomen,et al..The large angle spectroscopic coronagraph(LASCO)[J].Sol Phys,1995,162(1-2):357-402.
16 R A Howard,J D Moses,D G Socker.Sun Earth connection coronal and heliospheric investigation(SECCHI)[J].Space Science Reviews,2008,136(1-4):67.
17 Lin Jianchun,Sun Liwei,Chen Boyang,et al..Stray light analysis of a coaxial two reflect mirror system and optimized design of inner photomask[J].Chinese J Lasers,2013,40(1):0116001.林剑春,孙丽崴,陈博洋,等.同轴两反光学系统杂散光分析及内遮光罩优化设计[J].中国激光,2013,40(1):0116001.
18 Liu Jiang,Wang Fei,Wang Gaowen,et al..Application of standard intensity insensitive five-step phase-shifting algorithm in projected fringe deflectometry[J].Chinese J Lasers,2013,40(11):1108003.刘江,王飞,王高文,等.免疫投影基准光强变化的五步移相算法在条纹投影偏折法中的应用[J].中国激光,2013,40(11):1108003.
19 Fu Xiuhua,Mo Zhaoyan,Huang Jinlong,et al..Design and fabrication of near space laser communication link optical system filter film[J].Chinese J Lasers,2013,40(9):0907003.付秀华,莫朝燕,黄金龙,等.临近空间激光通信链路光学系统中滤光膜的研制[J].中国激光,2013,40(9):0907003.
20 Li Da,Meng Yanli,Chen Bo.Stray light analysis of reflective Lyman-Alpha coronagraph[J].Acta Optica Sinica,2012,32(8):0822006.李达,孟艳丽,陈波.反射式莱曼阿尔法日冕仪杂光分析[J].光学学报,2012,32(8):0822006.
21 Li Yan,Liu Jianfeng.Research on integrative suppression of internal and external stray light in infrared optical remote sensor[J].Acta Optica Sinica,2013,33(9):0928002.李岩,刘剑峰.红外光学遥感器内杂散光和外杂散光的综合抑制研究[J].光学学报,2013,33(9):0928002.
22 Yang Jiaqiang,Cheng Dewen,Wang Qingfeng,et al..Design of a novel wide view-field angle and anti-stray-light fundus camera[J].Acta Optica Sinica,2012,32(11):1122002.杨加强,程德文,王庆丰,等.新型大视场消杂光眼底相机光学系统的设计[J].光学学报,2012,32(11):1122002.
23 Lu Tianxiong,Bai Jian,Huang Zhi,et al..Stray light analysis and suppression of panoramic annular lens[J].Acta Optica Sinica,2013,33(5):0511003.鲁天雄,白剑,黄治,等.全景环带成像系统的杂散光分析及抑制[J].光学学报,2013,33(5):0511003.
24 Liu Wendong,Yang Bo.Lens-hood design of starlight semi-physical experimental platform[J].Laser&Optoelectronics Progress,2012,49(9):092203.刘文东,杨博.星光半物理实验平台遮光罩设计新方法[J].激光与光电子学进展,2012,49(9):092203.
25 Bian Wenbin,Gao Sitian,Lu Rongsheng,et al..Analysis of optical characters of confocal Fabry-Pérot interference microscopy probe[J].Laser&Optoelectronics Progress,2012,49(5):051203.边文宾,高思田,卢荣胜,等.共焦法布里珀罗干涉显微测头光学特性分析[J].激光与光电子学进展,2012,49(5):051203.
26 Wang Xiaokun.Fabrication and testing of large aperture off-axis SiC aspheric mirror[J].Laser&Optoelectronics Progress,2012,49(1):011201.王孝坤.大口径离轴碳化硅非球面反射镜加工与检测技术研究[J].激光与光电子学进展,2012,49(1):011201.
27 P G Nelson.An analysis of scattered light in reflecting and refracting primary objectives for coronagraphs[R].COSMO Tech Note 4.Boulder,CO,High Altitude Observatory,2007.