Optical design of coaxial eccentric-pupil three-mirror system with wide field of view
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摘要: 共轴偏光瞳系统克服了共轴系统视场角有限，离轴系统加工和装配困难等缺点，能更好满足空间对地观测等领域的要求。由共轴三反系统求解共轴偏光瞳无遮拦三反射镜光学系统的初始结构参数，设计了焦距为3000mm，F数为10的共轴偏光瞳的三反射光学系统。设计结果表明：该系统视场角达80.8，空间频率50lp/mm,调制传递函数值均大于0.55，接近衍射极限，满足系统对成像质量的要求。Abstract: The coaxial eccentric-pupil system has the advantages of long focal length, wide field of view and small volume. It overcomes the shortages of the limited field angle of the coaxial system, and the difficult of manufacture and assembly of the off-axis reflective system. It meets the requirement of high-resolution space-to-earth observation. The design process of coaxial eccentric-pupil three-mirror system is introduced. The coaxial eccentricpupil three-mirror system with focal length of 3000mm and F number of 10 was designed. The result indicates that the field of view of the system can attain to 80.8, and MTF is higher than 0.55 at 50lp/mm. The image quality of the optical system approaches the diffraction limit, and can satisfy the requirement of the system.
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Keywords:
- eccentric-pupil /
- long focal length /
- wide field of view /
- optical system design
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