Affiliation:
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Abstract
Space cameras play a pivotal role in various fields, such as astronomical exploration. When operating in orbit, these cameras encounter the relative motion between the target and the camera during the exposure, resulting in image motion, which affects the imaging quality. Therefore, it is necessary to compensate for this image motion. This paper investigates the in-orbit image motion compensation (IMC) method for space cameras with a long integration time based on a two-axis pointing platform. Firstly, the mechanical design of the camera is introduced. Secondly, the in-orbit IMC model for the camera is analyzed, and the angular motion needed for compensating for the image motion by the two-axis pointing platform are derived. Factors influencing the compensation accuracy are also analyzed. The effectiveness of the IMC model is verified through simulations. Finally, the in-orbit experimental results indicate that the energy concentration of the target star images obtained exceeded 70%, demonstrating excellent performance in space cameras and effectively enhancing imaging quality using IMC technology.
Funder
National Natural Science Foundation of China
Reference16 articles.
1. Improved genetic algorithm for intrinsic parameters estimation of on-orbit space cameras;Zhang;Opt. Commun.,2020
2. MTF estimation via BP neural networks and Markov model for space optical camera;Gu;J. Frankl. Inst.,2013
3. All-reflective optical bifocal zooming system without moving elements based on deformable mirror for space camera application;Zhao;Appl. Opt.,2013
4. Space optical remote sensor image motion velocity vector computational modeling, error budget and synthesis;Wang;Chin. Opt. Lett.,2005
5. Development of image motion compensation system for 1.3 m telescope at Vainu Bappu Observatory;Sreekanth;Res. Astron. Astrophys.,2020