应用光学, 2015, 36 (5): 691, 网络出版: 2015-12-18
一种新型微小视频卫星光学系统设计
Design of new type of micro video-capable satellite optical system
光学设计 微小型视频卫星光学系统 R-C光学系统 类曼金反射镜 场镜 optical design optical system of micro video-capable satellite R-C system Margin-like mirror field corrector
摘要
基于Ritchey-Chretien (R-C)光学系统, 采用Zemax软件设计次镜为类曼金反射镜的折反射式光学系统。系统的焦距为3 000 mm, 视场角为1°, 相对孔径为1/8, 工作谱段为450 nm~900 nm。结果表明, 截止频率为50 lp/mm处的MTF值为0.55, 接近衍射极限, 畸变小于0.022%。类曼金镜的非球面反射面与主镜构成R-C光学系统, 消除了系统的球差和彗差, 折射面分担次镜的光焦度, 减小了非球面的非球面偏心率。类曼金反射镜的加入, 将次镜非球面偏心率的平方由4.356减小到1.940, 而且系统总长度由600 mm减小到550 mm。
Abstract
Based on the Ritchey-Chretien(R-C) system, a refractive/reflective system with a Margin-like mirror and 3 correcting lenses in front of the focal plane was designed with the help of Zemax software. It has a focal length of 3000mm, F number of 8, waveband of 450nm~900nm, and the field of view reaches 1°. It is shown that the value of modulation transfer function(MTF) is higher than 0.55 at 50 lp/mm, the image quality reaches the diffraction limit,and the distortion is less than 0.022%. An R-C optical system is made up of the aspheric mirror of the Margin-like mirror and the primary mirror of the system without the spherical aberration and the coma aberration. The refractive surface of the Margin-like mirror shares the optical power of the secondary mirror, reducing the asphericity of the aspheric mirror. Results show that the Margin-like mirror can lessen the square asphericity of the secondary mirror from 4.356 to 1.940, and reduce the length of the system from 600 mm to 550 mm.
韩培仙, 金光, 钟兴. 一种新型微小视频卫星光学系统设计[J]. 应用光学, 2015, 36(5): 691. Han Peixian, Jin Guang, Zhong Xing. Design of new type of micro video-capable satellite optical system[J]. Journal of Applied Optics, 2015, 36(5): 691.