Terahertz - an Additional Spectral Range for Measuring and Testing

摘要

THz imaging and spectroscopy using innovative photonic THz sources and detectors have turned out to be very useful techniques for applications in nondestructive testing and quality control of industrial objects. By means of coherent detection methods amplitude, phase and time information can be obtained. Depending on the method of evaluation of the recorded THz signals different properties of objects under investigation can be determined. This includes thickness, shape, density or internal content. Typical examples of THz imaging of industrial objects are presented.