光子学报, 2010, 39 (12): 2229, 网络出版: 2011-01-26
集成式双线阵立体测绘相机光学系统设计
Optical System Design of an Integrated Dual-line Array Stereoscopic Mapping Camera
双线阵CCD相机 光学设计 离轴三反 畸变 Dual-line array stereoscopic mapping camera Optical design Off axis TMA Distortion
摘要
针对双线阵立体测绘相机光学系统设计指标的要求,设计了一种三反离轴光学系统,并针对该光学系统的特点,对像质进行了分析.光学系统设计传递函数在0.6左右(在50 lp/mm处),相对畸变小于3×10-4,校正绝对畸变小于20 μm,相机在成像质量方面达到立体测绘的要求.同时,为了使相机在体积尺寸小、结构紧凑及轻量化等方面满足卫星平台的要求,采用了一种新型的光学系统布局,在减小双线阵立体测绘相机的体积、材料及减轻重量等方面,具有独特的优势;光学系统可以安装在同一机械结构体内,以利于采取有效的热控措施,将主镜以一定的交会角在同一基准上支撑、装调,所以它具有尺寸稳定性好,温度敏感度低等优点.
Abstract
To conform the design requirements of optical system for dual-line array stereoscopic mapping camera, an off-axis three-mirror reflective system was designed and its image quality was analyzed. The MTF of the optical system is near 0.6 (at 50 lp/mm), relative distortion is less than 3×10-4,and the calibrated absolute distortion is less than 20 μm. The optical design was optimized to meet the nominal optical performance. At the same time, in order to meet the dimensional requirements,mechanics constraints and low mass required for space application, a new layout of optical systems was adopted, which has the unique merits of miniaturization and lightening. The optical systems could be assembled in the same mechanical structure,of which the primary mirrors were assembled and aligned on the same deck with the required intersection angle,so it has advantages of highly structure stabilization and environment adaptability.
姚罡, 傅丹膺, 黄颖. 集成式双线阵立体测绘相机光学系统设计[J]. 光子学报, 2010, 39(12): 2229. YAO Gang, FU Dan-ying, HUANG Ying. Optical System Design of an Integrated Dual-line Array Stereoscopic Mapping Camera[J]. ACTA PHOTONICA SINICA, 2010, 39(12): 2229.