中国光学, 2018, 11 (5): 790, 网络出版: 2018-11-25
移动地面站宽温度跟瞄系统信标接收镜头
Wide temperature range beacon receiver lens for tracking and aiming system of mobile ground station
激光通信 移动地面站 跟瞄系统 信标接收镜头 laser communication mobile ground station tracking and aiming system wide temperature range beacon receiver lens
摘要
为了保证移动地面站光电跟瞄系统在野外复杂环境下具有稳定的跟踪精度, 针对-20~40 ℃宽工作温度范围下信标接收镜头成像光斑弥散的问题, 进行了光学系统与光机结构的设计, 提出了一种以步进电机驱动补偿镜组的温度补偿方案。分析了极限温度条件下光学系统性能的改变以及不同温度补偿方案的效果, 针对光电跟瞄系统的指标要求, 设计了光机结构并进行了力学、光学性能的分析。分析结果表明, 系统一阶模态为370 Hz; 补偿镜组向前移动0695 mm能够补偿-20 ℃时光学系统成像光斑的弥散, 令中心视场光斑尺寸由73 μm降为32 μm, 边缘视场光斑尺寸由77 μm降为157 μm; 向后移动0885 6 mm能够补偿40 ℃时成像光斑的弥散, 令中心视场光斑尺寸由94 μm降为39 μm, 边缘视场光斑尺寸由96 μm降为218 μm; 使用ZYGO干涉仪对光学系统的像质进行检测, 波像差RMS值(均方根值)为0061λ(λ=6328 nm), PV值(峰谷值)为0466λ, 能够满足跟瞄系统指标要求。
Abstract
In order to ensure the stable tracking accuracy of the photoelectric tracking and aiming system of the mobile ground station in the complex environment in the field, the optical system and optical structure are designed to solve the problem of imaging spot dispersion of the beacon receiving lens under the working temperature width of -20~40 ℃. A temperature compensation scheme for driving the compensation lens group with a stepping motor is proposed. The change of optical system performance under extreme temperature conditions and the effect of different temperature compensation schemes are analyzed. According to the requirements of photoelectric tracking and aiming system, the opto-mechanical structure is designed and the mechanical and optical properties are analyzed. The analysis results show that the first-order mode of the system is 370 Hz; the compensation lens group moves forward by 0695 mm to compensate the dispersion of the optical system imaging spot at -20 ℃, and the central field spot size is reduced from 73 μm to 32 μm and the edge field spot size is reduced from 77 μm to 157 μm; moving back 0885 6 mm can compensate for the dispersion of the imaging spot at 40 ℃, reducing the central field spot size from 94 μm to 39 μm, and the edge field spot size from 96 μm to 218 μm. The image quality of the optical system is also detected using a ZYGO interferometer. The RMS(root mean square) valueof the wave aberration is 0061λ(λ=6328 nm), and the PV(peak-to-valley) value is 0466λ, which can satisfy the index requirements of the tracking and aiming system.
李响, 柳鸣, 王超, 李小明, 张家齐, 白杨杨, 孟立新, 张立中. 移动地面站宽温度跟瞄系统信标接收镜头[J]. 中国光学, 2018, 11(5): 790. LI Xiang, LIU Ming, WANG Chao, LI Xiao-ming, ZHANG Jia-qi, BAI Yang-yang, MENG Li-xin, ZHANG Li-zhong. Wide temperature range beacon receiver lens for tracking and aiming system of mobile ground station[J]. Chinese Optics, 2018, 11(5): 790.