【摘要】 设计了一个主镜为凸面的三镜无遮掩全反射光学系统。采用共轴系统设计、离轴视场使用的成像方式,避开了中心遮光,实现了大视场。其视场角为30°×2°,焦距为600mm,相对孔径为1/5 6。各个面都是二次曲面,成像质量接近衍射限。结果表明,用这种方法设计的系统在航天遥感领域具有很好的应用前景。更多还原

【Abstract】 A three-mirror unobscured all-reflected optical system is designed. On-axis system design is employed and off-axis field is used as effective field of system. Center obscur is avoided and wide field of view is realized. The parameters of this system are as follows: focal length is 600mm, relative aperture is 5.6, field of view is 30°×2°. All surfaces are conic and the evaluation shows that the image quality is approximate to diffraction limit over the full field of view.更多还原