摘要
立方星具有发射成本低、周期短、尺寸小和功率小等优点,非常适合某些创新技术率先验证、星载一体化或者以分布式空间网络的方式提供遥感与通讯等服务,例如星座和编队飞行等。鉴于此,设计一个适用于3U立方星平台的相机光学系统。首先通过对不同光学系统结构进行对比分析,确定系统采用同轴折反式结构,该系统的焦距为460 mm,视场角为4°,工作波段为450~700 nm。然后通过分析系统的传递函数,得到系统口径与遮拦比之间的对应关系,确定口径为92 mm,F数为5。最后对系统进行优化,系统以卡式系统为原型,主、次镜为曼金镜,优化后各视场的像质均接近衍射极限,在奈奎斯特频率处传递函数优于0.3。
Cubesat has the advantages of low launch cost,short cycle,small size,and low power requirement.It is highly suitable for the first verification of certain innovative technologies,satellite-borne integrations,or distributed space networks to provide remote sensing and communication services,such as constellations and flight formations.Herein,an optical camera system suitable for 3U cubic star platforms is designed.First,based on a comparison and analysis of different optical system structures,the proposed system uses a coaxial reflex structure.The focal length,field of view angle,and working waveband of the system are 460 mm,4°,and 450-700 nm,respectively.Then,by analyzing the transfer function of the system,the corresponding relation between the system aperture and blocking ratio is obtained.The aperture and F number are determined to be 92 mm and 5,respectively.Finally,the system is optimized.The system uses the cassette system as the prototype,and the primary and secondary mirrors are Mankin mirrors.After optimization,the image quality of each field of view is close to the diffraction limit and the transfer function at the Nyquist frequency is greater than 0.3.
作者
孙永雪
孙晖
姜守望
王珂
陈刚义
李涛
Sun Yongxue;Sun Hui;Jiang Shouwang;Wang Ke;Chen Gangyi;Li Tao(Shanghai Institute of Spacecraft Equipment,Shanghai 200240,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第5期229-234,共6页
Laser & Optoelectronics Progress
基金
“十三五”装备预研共用技术(41403010110)。
关键词
光学设计
光学系统设计
立方星
折反式光学系统
公差分析
光学传递函数分析
optical design
optical system design
cubesat
catadioptric optical system
tolerance analysis
modulation transfer function analysis
