Design And Manufacture Of Low-cost High-resolution Camera For Remote Sensing Micro-satellite

To get high-resolution remote sensing images, optical systems with large calibers, long focal lengths are usually used, which leading a result that the difficulty of carrying and cost sharply increase as the resolution requirement increases. Aiming to develop the high-resolution optical remote sensing technology in the field of commerce and martial tactics, this paper explores and researches low-cost high-resolution optical remote sensing camera available for micro-satellites.First, depending on the application requirements and optical imaging theory, some technical indicators such as the focal length, the aperture of the optical system are analyzed and determined. Designing ideas and technical ways to reduce the cost of high-resolution optical remote sensing cameras are discussed.Then, through the research and design of traditional two-mirror catadioptric systems and three-mirror systems, a new kind of catadioptric system based on the two-mirror system is put forward. The new system consists of a Cassegrain structure and a three-lens group which can amplify the focal length. Designing ideas of the system are introduced in detail. The system has the advantages of being easier to manufacture and low-cost as two-mirror catadioptric systems, meanwhile, has the advantages of small-volume and light-weight as three-mirror systems. By analyzing the new system’s geometric structure and deriving its primary aberration formulas, the methods to correct chromatism and monochrome aberration are given out as well as the method to determine its initial structure. An designed result meeting the requirement and being suitable for low-cost development is obtained. A reliable technological approach for reducing difficulty and cost is provided by making sure methods for manufactures of components and the system, optimizing the allocation of tolerances, designing structures for reducing the effect of temperature and so on,.Finally, the validity of the designed result and the feasibility for the development of low-cost high-resolution optical remote sensing camera are verified though manufacturing and testing the experimental prototype. This work lays the foundation for manufacturing engineering prototypes and developing better payloads for micro-satellites.