Research On The Optical System With Double Channel For Space Target Detection

The space-based detection and recognition for the space target is a kind of method which is based on space target detection system to gain information of space target. It can extract the basic characteristics of target, then analysis the type, property, operating mode, and even the threat level.First of all, the general analysis of the space target is carried out. The necessity of the research in this paper is analyzed. And the thesis puts forwards the initial technical index. The primary research details of the paper consist of four parts:(1)The visible and infrared characteristics of the space target are analyzed and calculated. As a result, these works could apply for demonstrating the technical index of the double channel optical system;(2)According to the initial technical index and technical level of the detector in domestic, the thesis chooses the appropriate detector for the optical system. After that, by using the result from the characteristics of the space target, the technical index of the double channel optical system is demonstrated. Including focal lengths, field of views, effective apertures. Finally, the ability of detection of the double channel optical system is demonstrated;(3)Fully analyses of the multi-channel optical system in nowadays have been made. And according to the previous index, the form of the system in the paper is determined. The main system is a three-reflection system, and the primary mirror is designed as the first and the third reflecting surface with different figuring. The main benefits of this design are the large corrected and unvignetted FOV, an easily baffling of stray light, small encumbrance and an easy handing;(4)Then based on the requirement, the thesis designs the double channel optical system. Moreover, the evaluation of the image quality and analysis of tolerance have finished. Finally, the stray light of the optical system is qualitative analyzed.