摘要
为了提高太赫兹线扫描成像系统的扫描精度与信息提取的准确性,优化设计了其中的分束系统与扫描系统。设计了不同角度的楔镜将平板分束镜中多次反射所产生的回波信号消除,分析了不同楔角下的信号强度,并将高阻硅楔镜、薄膜分束器与HDPE(高密度聚乙烯)楔镜进行信号强度对比。设计了准直透镜和F-theta透镜组成的扫描系统,通过使用非球面使得F-theta透镜的视场角在±30°内实现等相位,最后给出透镜扫描的实验结果与预期相符合,误差小于1%。
In order to improve the scanning accuracy and information extraction accuracy of the terahertz line scanning imaging system,the beam splitting system and scanning system are optimized.Wedge mirrors with different angles were designed to eliminate the echo signal generated by multiple reflections in the flat beam splitter,the signal intensity at different wedge angles was analyzed,and the signal strength of the high-impedance silicon wedge mirror,thin film beam splitter and HDPE(highdensity polyethylene)wedge mirror was compared.A scanning system composed of collimating lens and F-theta lens is designed,and the field of view of the F-theta lens is equal in±30°by using aspheric surface,and finally the experimental results of lens scanning are consistent with the expected error,which is less than 1%.
作者
林子豪
李全勇
任姣姣
薛竣文
LIN Zihao;LI Quanyong;REN Jiaojiao;XUE Junwen(School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022;Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 528403)
出处
《长春理工大学学报(自然科学版)》
2025年第2期45-54,共10页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
吉林省自然科学基金项目(YDZJ202301ZYTS242)
中山市第九批创新科研团队项目(GXTD2022010)。
关键词
太赫兹时域光谱系统
扫描系统
分束系统
F-theta透镜
楔镜
terahertz time-domain spectroscopy system
scanning systems
beam splitting system
F-theta lenses
wedge mirror
