Terahertz lenses made by compression molding of micropowders
Terahertz lenses made by compression molding of micropowders
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DOI：
10.1364/ao.50.002256
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发表时间：
2011-05-20
期刊：
影响因子：
1.9
通讯作者：
Wiesauer, Karin
中科院分区：
文献类型：
--
作者：
Scherger, Benedikt;Scheller, Maik;Wiesauer, Karin
本文提出了一种简单而通用的方法来制作太赫兹透镜，该方法基于在桌面液压机中对微粉聚合物材料进行压缩成型。为了证明这种方法的可行性，一个双凸透镜的形状计算使用光线跟踪算法和基于两种不同的微粉制造的透镜。由于粉末材料具有不同的折射率，所得到的透镜具有相同的几何形状，但其各自的焦距不同。透镜的聚焦性能进行了评估的横向和矢状光束轮廓测量在光纤耦合太赫兹时域光谱系统，确认了优异的成像质量的压缩成型透镜。(C)2011年美国光学学会
We present a simple and versatile approach for fabricating terahertz lenses based on compression molding of micropowder polymer materials in a tabletop hydraulic press. To demonstrate the feasibility of this approach, a biconvex lens shape is calculated using a ray-tracing algorithm and lenses based on two different micropowders are fabricated. As the powder materials have different refractive indices, the resulting lenses share the same geometric shape but differ in their respective focal length. The focusing properties of the lenses are evaluated by transversal and sagittal beam profile measurements in a fiber-coupled terahertz time-domain spectroscopy system, confirming the excellent imaging qualities of the compression molded lenses. (C) 2011 Optical Society of America