In the final step of approaching and docking proximity of space rendezvous and docking, it is necessary to measure therelative position and posture of two spacecrafts with high precision using by optical imaging sensor. The image quality ofthe optical system itself of optical image sensor, to a great extent, will influence the accuracy of navigation information ofrendezvous and docking, and even determine the success or failure of rendezvous and docking task. The image telecentricoptical system, adopted by the multi-components and retrofocus structure and designed by the hyperfocal distance theory,not only can realize clear imaging from 2 meters to infinity, but also can make sure the center position of image that isimaged by the object from 2 meters to infinity basically invariant. It used the method of "S" type correction of distortionand corrected the distortion of edged field of view (FOV) and 0.8 FOV synchronously, which realized the relative distortionless than 0.028%（absolute distortion less than 0.78 ）in the range of μm 30° fields of view, and met the requirements ofthe high precision of imaging system and illuminancy uniformity of different fields of view.
展开▼
