摘要
设计了一套用于太赫兹阵列探测器扫描成像的光学系统,采用光学设计软件分别对柱面镜和聚焦透镜的面型进行了仿真,仿真结果表明,经过柱面镜后,点光源变成了线光源,线光源的宽度为1.4 cm。实验中,分别采用VDI单元探测器和中科院苏州纳米所自主研发的场效应管阵列探测器对物体进行成像,其中VDI单元探测器成像效果较为清晰,阵列探测器的图像中存在一定的条纹,原因来源于探测器像元之间的耦合和串扰。本文采用柱面镜结合阵列探测器,提升了扫描成像的速度。
An optical system for scanning and imaging of terahertz array detectors is designed in this paper.The surface shapes of cylindrical mirror and focusing lens are simulated by ZEMAX.The simulation results show that after cylindrical mirror,point light source becomes line light source,and the width of line light source is 1.4 cm.In the experiment,VDI single detector and field-effect transistor array detectors developed by Suzhou Institute of Nanotechnology of Chinese Academy of Sciences are used to image objects.The imaging effect of VDI single detector is clearer,but there are some fringes in the image of array detectors.The reason lies in the coupling effect and crosstalk among detector pixels.In this paper,cylindrical mirror combined with array detectors is used to improve the speed of scanning imaging.
作者
蔡健
李亚茹
吴炎际
CAI Jian;LI Ya-ru;WU Yan-ji(Brainware Terahertz Information Technology Co.,Ltd.,Hefei 230088,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2020年第2期224-228,共5页
Laser & Infrared
关键词
柱面镜
阵列探测器
成像速度
cylindrical mirror
array detectors
imaging speed
