Athermalization of Optical System with Large Field of View for Image Navigation
文献类型:会议论文
作者 | Zhang, Jialei4,5; Xue, Yaoke1,2,3,4,5; Zhou, Canglong5; Lin, Shangmin4,5; Liu, Meiying4,5 |
出版日期 | 2023 |
会议日期 | 2023-08-26 |
会议地点 | Wuhan, China |
关键词 | Large field of view Optical design Athermalization Image navigation Stray light |
卷号 | 2617 |
期号 | 1 |
DOI | 10.1088/1742-6596/2617/1/012007 |
英文摘要 | Image navigation sensor is one of the most important sensing means for human to explore the extraterrestrial space environment, and optical system is a key component of image navigation sensor, directly determines the amount of information perceived. The optical system requirements of image navigation sensors are gradually developing towards large field of view and miniaturization. The fisheye lens is the first choice for large field of view imaging by selecting the appropriate optical structure, without adding other additional components, and has the advantages of small size and strong perception energy. However, as the image surface illuminance of fisheye lens will decrease sharply with the increase of the field of view, the change of temperature will also degrade the imaging quality of the system, and strong stray light sources such as the sun will easily enter the field of view, which will greatly affect the perception ability of the system. Because of this, effective design of these systems is quite difficult. In this paper, a reverse-telephoto structure was used for large-field imaging, and the degradation of imaging quality caused by temperature changes was eliminated by selecting appropriate optical and mechanical materials. Designed with a focal length of 6.7mm, an F number of 3.6, a viewing angle of 130°, a working band of 0.45μm to 0.65μm, an after work distance of 7mm, a total system length≤60mm, we tested our system in a -40°C to +60°C temperature range and measured the image quality. Through simulation analysis, the system in the whole field of view within our spot diagrams was≤5.5μm, optical transfer function was greater than 0.2 at 90lp/mm, and no vignetting occurred. Furthermore, the imaging illumination of the edge field of view was 0.72 times that of the center field of view, the f - tan (θ) relative distortion value of the center field of view was≤2.3%, and the f - θ relative distortion value of the edge field of view was≤2.7%. Compared to normal temperatures, the optical transfer function changes at -20°C and +40°C were 0.02 and 0.01, respectively. Thus, the system displayed the characteristics of excellent image quality, small size, high energy utilization rate and good non-thermal performance. © Published under licence by IOP Publishing Ltd. |
产权排序 | 1 |
会议录 | Journal of Physics: Conference Series |
会议录出版者 | Institute of Physics |
语种 | 英语 |
ISSN号 | 17426588;17426596 |
源URL | [http://ir.opt.ac.cn/handle/181661/97018] |
专题 | 西安光学精密机械研究所_空间光学应用研究室 |
通讯作者 | Xue, Yaoke |
作者单位 | 1.Xi'An Space Sensor Optical Technology Engineering Research Center, Xi'an; 710119, China 2.Beijing University of Aeronautics and Astronautics, Beijing; 100191, China; 3.Youth Innovation Promotion Association, Beijing; 100037, China; 4.University of Chinese Academy of Sciences, Beijing; 100049, China; 5.Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; |
推荐引用方式 GB/T 7714 | Zhang, Jialei,Xue, Yaoke,Zhou, Canglong,et al. Athermalization of Optical System with Large Field of View for Image Navigation[C]. 见:. Wuhan, China. 2023-08-26. |
入库方式: OAI收割
来源:西安光学精密机械研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。