高分辨率空间遥感卫星的离轴三反光学系统设计
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摘要
设计了一种用于空间遥感卫星的高分辨率离轴三反光学系统,该系统具有大视场、长焦距、高分辨率的特点,其焦距f为1 200mm,F/#为10,水平视场角可达±2.5°、垂直视场角可达±2.5°。当卫星轨道高度为300km,传感器像元尺寸为8μm时,地元分辨率GSD可达2 m。通过对参数的多次优化,最终设计的光学系统在空间频率62.5lp/mm处全视场MTF值均大于0.3,成像效果优良,接近衍射极限。
An off-axis three-mirror reflective system is designed for high resolution space remote sensing satellite.The system has a large field of view,long focal length and high resolution.The optical system can achieve the focal length of1 200 mm,F/# of 10,the horizontal field of view of±2.5°,the vertical field of view of±2.5°.When the satellite orbit height is 300 km and the sensor pixel size is 8μm,the ground resolution GSD is up to 2 m.Through the optimization of the parameters,the final design of the optical system at the spatial frequency of 62.5 lp/mm at the full field of view MTF values are greater than 0.3.The imaging results are excellent,closing to the diffraction limit.
An off-axis three-mirror reflective system is designed for high resolution space remote sensing satellite.The system has a large field of view,long focal length and high resolution.The optical system can achieve the focal length of1 200 mm,F/# of 10,the horizontal field of view of±2.5°,the vertical field of view of±2.5°.When the satellite orbit height is 300 km and the sensor pixel size is 8μm,the ground resolution GSD is up to 2 m.Through the optimization of the parameters,the final design of the optical system at the spatial frequency of 62.5 lp/mm at the full field of view MTF values are greater than 0.3.The imaging results are excellent,closing to the diffraction limit.
引文
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[12]史光辉.卫星对地观测高分辨率光学系统和设计问题[J].光学精密工程,1997,7(2):16-24.SHI Guang-hui.High resolution optical systems used to observation from the satellites to the earth and problems in design[J].Optics and Precision Engineering,1997,7(2):16-24.
[2]巩盾.空间遥感测绘光学系统研究综述[J].中国光学,2015,8(5):714-724.GONG Dun.Review on mapping space remote sensor optical system[J].Chinese Optics,2015,8(5):714-724.
[3]常军,翁志诚,姜会林.用于空间的三反射镜光学系统设计[J].光学学报,2003,23(2):216-219.CHANG Jun,WENG Zhi-cheng,JIANG Hui-lin.Design on three-reflective-mirror system used in space[J].Acta Optica Sinica,2003,23(2):216-219.
[4]齐光,王书新,李景林,等.离轴三反光学遥感器遮光罩的设计与试验验证[J].中国光学,2016,9(4):472-482.QI Guang,WANG Shu-xin,LI Jing-lin,et al.Design and test verification of baffle for off-axis three-mirror space optical remote sensor[J].Chinese Optics,2016,9(4):472-482.
[5]朱钧,杨通,金国藩.自由曲面离轴三反光学系统:中国,104898262.A[P].2015-09-09.ZHU Jun,YANG Tong,JIN Guo-fan.Off-axis three-mirror reflective system of free-form surface:China,104898262.A[P].2015-09-09.
[6]潘君骅.光学非球面的设计、加工、检测[M].北京:科学出版社,1994.PAN Jun-hua.Optical aspheric design,processing,testing[M].Beijing:Science Press,1994.
[7]张亮,安源,金光.大视场、长焦距离轴三反射镜光学系统的设计[J].红外与激光工程,2007,36(2):278-280.ZHANG Liang,An Yuan,JIN Guang.Optical design of the uncoaxial three-mirror system with wide field of view and long focal length[J].Infrared and Laser Engineering,2007,36(2):278-280.
[8]刘辉,李兴隆,裴云天.离轴三反射式光学系统的设计[J].激光与光电子学进展,2008,45(12):59-63.LIU Hui,LI Xing-long,PEI Yun-tian.Design on three-reflective-mirror system[J].Laser&Optoelectronics Progress,2008,45(12):59-63.
[9]郑国宪,许士文.用于海洋成像仪的离轴三反主光学系统设计[J].宇航学报,2007,28(4):1030-1033.ZHENG Guo-xian,XU Shi-wen.Design of diaphragm-off-axis three-mirror anastigmatic system used on ocean imager[J].Journal of Astronautics,2007,28(4):1030-1033.
[10]刘琳,薛鸣球,沈为民.提高离轴三反射镜系统成像质量的途径[J].光学技术,2002,28(2):181-184.LIU Lin,XUE Ming-qiu,SHEN Wei-min.Approach to increase the image performance of the uncoaxial threemirror reflective system[J].Optical Technology,2002,28(2):181-184.
[11]李旭阳,李英才.高分辨率空间相机共轴三反光学系统实现形式研究[J].应用光学,2009,30(5):717-723.LI Xu-yang,LI Ying-cai.Coaxial three-mirror-anastigmatic system of high-resolution space camera[J].Journal of Applied Optics,2009,30(5):717-723.
[12]史光辉.卫星对地观测高分辨率光学系统和设计问题[J].光学精密工程,1997,7(2):16-24.SHI Guang-hui.High resolution optical systems used to observation from the satellites to the earth and problems in design[J].Optics and Precision Engineering,1997,7(2):16-24.