Abstract

Tomographic terahertz imaging is on the way of becoming an excellent tool for a plurality of industrial as well as public applications [1]. Due to the non-ionizing nature of terahertz radiation and the low absorption coefficient of materials as e.g. paper, plastic or ceramic, tomographic terahertz imaging can become an alternative to x-ray tomography. Beside the benefits of imaging in the terahertz frequency range, still remaining challenges are the development of highly sensitive multi-pixel detector arrays and the elimination of optical effects like refraction, which can lead to distortion of the reconstructed image [1, 2]. In order to overcome the requirement of a multi-pixel detector array, a multiplexing approach can be used. In this approach a multitude of different transmission pattern are created and the complete transmitted intensity is measured for each pattern. By correlating the pattern geometries to the corresponding measured intensities an image can be reconstructed [3, 4].

© 2017 IEEE