Optimization Design Of Improved Cassegrain Telescope System

In 21 century, optical systems have played more and more important part in Civilian products and Military Engineering, Even in our daily life. Particularly, the small-light systems with long focal length. The dissertation analyzed the advantages and Shortcomings of Reflective system and Refraction system. Afterwards, the author designed a new system by the combination of the advantages of the Reflective system and the Refraction system. The Primary mirror and the Secondary mirror are both sphere which is more easily to realize. With the new casual long foal length system mentioned above we can realize the simpler and light system than the Refraction system. Then, some problems are discussed such as the aperture and obstruction of the new system. At last, the dissertation certificated the feasibility of the new system follow the points of energy and obstruction . The writer analyzed the stray light of the system designed in the obstruction.