多波段全天空气辉成像仪光学系统设计
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摘要
为了降低多波段全天空成像仪的复杂度和研制成本,提出了一种免调焦、高鲁棒性的多波段全天空成像光学系统方案.采用像方远心鱼眼镜头加物方远心像方准远心的有限共轭距成像镜组成二次成像系统,货架级的窄带滤光片置于一次像面处,使用H-FK61和KF2两种玻璃实现全系统复消色差.设计结果表明:系统F数为2.8,波段范围427.8～865nm,色焦移小于0.048mm,系统8个观测通道的光学传递函数都在0.46以上,满足使用要求,且滤光片公差容限非常宽松,面形公差PV≤λ/2、折射率公差±0.003、厚度公差±0.05,货架级产品即可满足使用要求.相比传统方案,该系统省去了探测器调焦机构、且不需要使用定制的窄带滤光片,达到了简化系统降低成本的目的.
In order to reduce the complexity and development cost of the multi-band all-sky imager,a multi-band all-sky imaging optical system with no focusing and high robustness is proposed.A secondary imaging system is composed of a telecentric fisheye lens and a finite conjugate distance imaging lens of the telecentric image.The shelf-level narrow-band filter is placed at the image plane,using H-FK61 and KF2 glasses achieve full system apochromatic.The design results show that the systemFnumber is 2.8,the band range is 427.8～865 nm,the chromatic focal shift is less than 0.048 mm,and the optical transfer functions of the eight observation channels of the system are all above 0.46,which meets the application requirements.The tolerance of filter is very loose.The surface tolerance PV is less than λ/2,the refractive index tolerance is±0.003,the thickness tolerance is±0.05,and the shelf-level products can meet the application requirements.Compared with the traditional scheme,the system eliminates the detector focusing mechanism and does not need to use a customized narrow-band filter,which simplifies the system and reduces the cost.
In order to reduce the complexity and development cost of the multi-band all-sky imager,a multi-band all-sky imaging optical system with no focusing and high robustness is proposed.A secondary imaging system is composed of a telecentric fisheye lens and a finite conjugate distance imaging lens of the telecentric image.The shelf-level narrow-band filter is placed at the image plane,using H-FK61 and KF2 glasses achieve full system apochromatic.The design results show that the systemFnumber is 2.8,the band range is 427.8～865 nm,the chromatic focal shift is less than 0.048 mm,and the optical transfer functions of the eight observation channels of the system are all above 0.46,which meets the application requirements.The tolerance of filter is very loose.The surface tolerance PV is less than λ/2,the refractive index tolerance is±0.003,the thickness tolerance is±0.05,and the shelf-level products can meet the application requirements.Compared with the traditional scheme,the system eliminates the detector focusing mechanism and does not need to use a customized narrow-band filter,which simplifies the system and reduces the cost.
引文
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[11] KRYSZCZYNSK I,TADEUS Z.Secondary spectrum aberrations of refractive optical systems[J].SPIE,1995,2208:18-27.
[12] BAI Qing-lan,MIAO Xing-hua.Achromatized design of near UV-visible wide-angle objective[J].Acta Photonica Sinica,2004,33(11):1331-1335.白清兰,苗兴华.消色差的近紫外-可见光广角物镜设计[J].光子学报,2004,33(11):1331-1335.
[13] WANG Mei-qin,WANG Zhong-hou,BAI Jia-guang.Removing secondary spectrum in wide spectrum optical system[J].Journal of Applied Optics,2010,31(3):360-364.王美钦,王忠厚,白加光.宽谱段光学系统消二级光谱的设计[J].应用光学,2010,31(3):360-364.
[2] TU Cui.Research on all-sky gravity wave imager[D].Center for Space Science Applied Research,Chinese Academy of Sciences,2011.涂翠.全天空大气重力波成像仪研究[D].中国科学院研究生院(空间科学与应用研究中心),2011.
[3] AAMODT E K,EATHER R H,MENDE S B.Instrument for the monochromatic observation of all sky auroral images[J].Applied Optics,1977,16(6):1691-1700.
[4] CRISWIC K,JOHN R.An all-sky imager for observing airglow activity in the upper atmosphere[D].York University,Toronto,1996.
[5] SHIOKAWA K,KATOH Y,SATOH M,et al.Development of optical mesosphere thermosphere imagers(OMTI)[J].Earth Planets&Space,1999,51(7-8):887-896.
[6] TAGUCHI M,EJIRI M,TOMIMATSU K.A new all-sky optics for aurora and airglow imaging[J].Advances in Polar Upper Atmosphere Research,2004,18:140-148.
[7] REDMAN B J,SHAW J A,NUGENT P W,et al.Reflective all-sky thermal infrared cloud imager[J].Optics Express,2018,26(9):11276.
[8] NYASSOR P K,BURITI R A,PAULINO I,et al.Determination of gravity wave parameters in the airglow combining photometer and imager data[J].Annales Geophysicae,2018,36(3):705-715.
[9] LV Li-jun,WU Xue-wei.Design of initial structure of fisheye lens[J].Acta Optica Sinica,2017,37(2):0208001.吕丽军,吴学伟.鱼眼镜头初始结构的设计[J].光学学报,2017,37(2):0208001.
[10] YANG Qing-hua,ZHAO Bao-chang,ZHOU Ren-kui.Correction of secondary spectrum based on normal dispersion glasses[J].Acta Photonica Sinica,2008,37(4):772-775.杨庆华,赵葆常,周仁魁.基于正常色散玻璃二级光谱的校正[J].光子学报,2008,37(4):772-775.
[11] KRYSZCZYNSK I,TADEUS Z.Secondary spectrum aberrations of refractive optical systems[J].SPIE,1995,2208:18-27.
[12] BAI Qing-lan,MIAO Xing-hua.Achromatized design of near UV-visible wide-angle objective[J].Acta Photonica Sinica,2004,33(11):1331-1335.白清兰,苗兴华.消色差的近紫外-可见光广角物镜设计[J].光子学报,2004,33(11):1331-1335.
[13] WANG Mei-qin,WANG Zhong-hou,BAI Jia-guang.Removing secondary spectrum in wide spectrum optical system[J].Journal of Applied Optics,2010,31(3):360-364.王美钦,王忠厚,白加光.宽谱段光学系统消二级光谱的设计[J].应用光学,2010,31(3):360-364.