Illumination Aspects in Active Terahertz Imaging
Illumination Aspects in Active Terahertz Imaging
复制标题
主动太赫兹成像中的照明方面
DOI：
10.1109/tmtt.2010.2050247
复制
发表时间：
2010
影响因子：
4.3
通讯作者：
H. Roskos
中科院分区：
文献类型：
--
作者：
W. von Spiegel;C. am Weg;R. Henneberger;R. Zimmermann;H. Roskos
本文主要研究了主动太赫兹成像中的照明问题。首先，我们介绍了我们的快速620-GHz相机，并讨论了聚焦照明成像。之后，我们切换到全局照明，并讨论其优点和缺点。与聚焦照明相比，强度损失不会完全影响动态范围，因为可以避免分束器处的损失和光学器件向检测路径的背反射。对检测器光学器件所接受的角度范围的适应是更困难的，但是利用分离的照明和检测路径获得了灵活性。一个812 GHz的相机目前正在开发和展示全球照明和32像素检测器，提高帧速率的前景。此外，高精度的地形重建的概念，从多个太赫兹图像与几个角度的照明进行了讨论。
Our paper focuses on illumination aspects in active terahertz imaging. First, we introduce our fast 620-GHz camera and discuss imaging with focused illumination. After that, we switch to global illumination and discuss its benefits and drawbacks. The loss in intensity-compared to focused illumination-does not fully come to bear on the dynamic range because losses at the beam-splitter and back-reflection by the optics into the detection path can be avoided. The adaptation to the angular range accepted by the detector optics is more difficult, but flexibility is gained with separated illumination and detection paths. An outlook is given on a 812-GHz camera currently being developed and exhibiting global illumination and a 32-pixel detector for improved frame rates. Furthermore, a concept for high-accuracy topography reconstruction from multiple terahertz images taken with several angles of illumination is discussed.