Analysis and optimization of THz imaging optics with off-axis parabolic mirrors
Analysis and optimization of THz imaging optics with off-axis parabolic mirrors
复制标题
离轴抛物面镜太赫兹成像光学分析与优化
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Z. Taylor
中科院分区：
文献类型：
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作者：
S. Sung;J. Garritano;N. Bajwa;B. Nowroozi;W. Grundfest;Z. Taylor
提出了一种基于离轴抛物面反射镜的太赫兹成像系统的设计思想。给出了两种不同结构的离轴抛物镜列的太赫兹场畸变及其偏振分布。比较了不同f/#反射镜下沿着传播路径的场和偏振失真。通过反射镜的对称取向来抵消畸变效应，从而恢复原始源轮廓。补偿（对称）和非补偿（反对称）设计之间的字段配置文件的比较。对称镜对也使偏振旋转反转。这一讨论指出了一个重要的设计考虑太赫兹成像系统，利用OAP镜。
Design considerations for an off-axis parabolic mirror based THz imaging systems are presented. The distortion of THz field and its polarization profile are shown for two different configurations of off-axis parabolic mirror trains. The field and polarization distortions along the propagation path are compared with different f/# mirrors. The distortion effects were cancelled out by symmetric orientation of mirrors that recovers the original source profile. Comparisons of field profiles between compensated (symmetric) and uncompensated (antisymmetric) design are shown. Symmetric mirror pairs also rewinds rotation of polarization. This discussion points to an important design considerations for THz imaging systems that utilize OAP mirrors.