摘要
二维太赫兹探测成像适用于以太赫兹波作为探测波的安全检查和质量控制等方面。为实现大视场的二维太赫兹探测成像光学系统设计,根据匹兹万条件,分析了光学三反系统面型,并提出了一种反远距离轴三反结构,设计了视场角为20°×20°,焦距为70mm,F数为3.5的离轴三反光学系统。设计结果表明,该光学系统调制传递函数接近衍射极限,各个视场的点列图均方根半径均远小于艾里斑半径,具有良好的成像质量,满足设计要求。
Two-dimensional THz imaging can be used for safety inspection and quality control. This paper presents the de- sign of a wide field off-axis three-mirror optical system for two-dimensional THz imaging. The surface types of the three-mirror system are analyzed according to the Petzval＇s condition and an off-axis three-mirror system based on the retrofocus configuration is proposed. And an off-axis three-mirror system with a field of view of 20°×20°, a focal length of 70 mm and F number of 3.5 is designed. The result indicates that MTF of the optical system is close to the diffraction limit. In each field of view, the RMS radius of the spot diagram is much smaller than the radius of the Airy disk. The optical system with a good image quality meets the design requirements.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2015年第5期167-171,共5页
High Power Laser and Particle Beams
基金
国防技术基础项目(YJMG-2012GH-001)
关键词
太赫兹
二维
光学系统
反远距结构
离轴三反
THz
two-dimensional
optical system
retrofocus configuration
off-axis three-mirror system
