摘要
星敏感器的光机设计水平直接关系到仪器姿态测量精度的极限。为满足微纳卫星平台使用需求,设计了一种大相对孔径,宽视场的超轻小型星敏感器光学系统及其机械结构。镜头选用6片球面透镜,有效焦距为16mm,工作波长为500～800nm,F#=1.2,视场为20°,全视场内,像点80%的能量集中在3×3像元内,全视场倍率色差小于2μm,相对畸变小于0.1%,优化后所有视场下MTF值均大于0.4。系统总长仅为26mm。针对星敏感器光学系统轻小化需求,选取铍铝合金作为材料进行结构设计。在抗震方面,采用具有相切界面的圆锥类隔圈和压圈以增加接触面积,减小对镜片压强。最终光机系统总质量为10.32g,能够较好的满足小卫星平台的使用需求。
The opto-mechanical design level of the star sensor is directly related to the limit of the instrument’s attitude measurement accuracy. In order to meet the usage requirements of the micro-nano satellite platform,an optical system and its mechanical structure of an ultra-light small star sensor with large relative aperture and wide field of view is designed. The system consists of 6 spherical lenses. The effective focal length is 16 mm. The working spectrum is 500 to 800 nano-meter;the F#=1.2,the field of view is 20°;80% of the energy is concentrated in 3×3 pixels in the full field of view;the lateral chromatic aberration is less than 2μm in full field of view and the relative distortion is less than 0.1%. After the optimization,the MTF values in all fields of view are greater than 0.4. The total length of the system is only 26 mm. Aiming at the lightweight and small demand of the star sensor optical system,the beryllium aluminum alloy is selected as the structural material for the structural design. In terms of seismic resistance,conical spacers and pressure coils with tangential interfaces are used to increase the contact area and reduce the pressure on the lens. The final opto-mechanical system has a total mass of 10.32 g,which can better meet the needs of small satellite platforms.
作者
魏明
王超
付强
高天元
史浩东
WEI Ming;WANG Chao;FU Qiang;GAO Tianyuan;SHI Haodong(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022;National and Local joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 13022)
出处
《长春理工大学学报（自然科学版）》
2019年第1期23-26,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金项目(61805028
91438204)
吉林省教育厅科学基金项目([2016]369
[2016]366)
长春理工大学青年科学基金项目(WQNJJ-2016-15)
关键词
光学设计
星敏感器
大相对孔径
轻小型
optical design
star sensor
large aperture
light and compact
