摘要
通过对非致冷离轴三反光学系统的结构和像差特性进行研究,在光学系统适当的位置引入了自由曲面,设计了焦距为300mm,F数为2,视场为12mm×16mm的非致冷离轴三反光学系统。该光学系统在空间频率为20lp/mm处调制传递函数值均大于0.45。与以往的离轴三反光学系统相比,该系统主光线在系统内相交三次,实现了更加紧密的系统结构,减小遥感器的体积,提升成像质量。
Through the reserach on the structural features and aberration characteristics of the off-axis three-mirror optical system,an un-cooled Infrared off-axis three-mirror system is designed with focal length of 300 mm,F-number of2 and field of view 12mm×16mm.A freeform surface is used in the appropriate location of the system. The modulation transfer function of this optical system is higher than 0.45 at spatial frequency of 20 lp/mm.Compared with other off-axis three-mirror system,the main advantage of this system is that it can obtain maximum compactness.The chief ray is arranged to cross three times inside the system,reducing the volume and enhancing the quality of remote sensor imaging.
出处
《长春理工大学学报（自然科学版）》
2014年第4期6-9,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
光学设计
离轴三反
自由曲面
红外系统
optical design
off-axis three-mirror
freeform surface
infrared system
