光学与光电技术, 2018, 16 (4): 75, 网络出版: 2018-08-30
高分辨率空间遥感卫星的离轴三反光学系统设计
Off-Axis Three-Mirror Reflective System for High Resolution Space Remote Sensing Satellite
离轴三反式光学系统 光学设计 调制函数 空间遥感 高分辨率 off-axis three-mirror reflective system optical design modulation transfer function space remote sensing high resolution
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1 200 mm,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300 km,传感器像元尺寸为8 μm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62.5 lp/mm处全视场MTF值均大于0.3,成像效果优良,接近衍射极限。
Abstract
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 of 1 200 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 8 μm, 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.
黄晓园, 黄铭烨, 陈冠亮, 杨俊烨, 王红成. 高分辨率空间遥感卫星的离轴三反光学系统设计[J]. 光学与光电技术, 2018, 16(4): 75. HUANG Xiao-yuan, HUANG Ming-ye, CHEN Guan-liang, YANG Jun-ye, WANG Hong-cheng. Off-Axis Three-Mirror Reflective System for High Resolution Space Remote Sensing Satellite[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2018, 16(4): 75.