Using our expertise in THz, we have pushed the boundaries of Non-Destructive Testing (NDT), a groundbreaking technology that redefines material inspection without compromise.
With benefits inherited from IR and millimeter-waves, THz electromagnetic waves can provide in-depth inspection in a non destructive manner of a wide range of materials ranging from polymers and ceramics, to fibered-based composites featuring complexes geometries such as honeycomb structures. The advantages of THz combined with the capabilities of Frequency Modulation Continuous Wave (FMCW) radar sensors enable 3D inspection and sensing capabilities.
The principle is based on time of flight (ToF) sensing: The emitted THz waves from radar are directed at the materials being inspected, these waves interact with the material. By measuring the time it takes for the reflected waves and echoes, a 3D image of the material's internal structure is created. This image is then analyzed to detect a wide variety of defects such as density variations, inclusions, delaminations, air pockets and structural damages.

Moreover, the highly reflective aspect of metallic substrate or carbon fibered doped substrate still makes THz sensing perfectly suitable for many applications such as corrosion sensing under protective paint layers. The ability of THz NDT to see through objects in 3D, its sensitivity to a wide range of materials, and its safety make it a valuable tool for ensuring the quality of products in many industries.

TeraScan product line offers unparalleled versatility and performance. It comes equipped with:

 > FMCW radar sensors

> Software suite

The TeraScan features interchangeable units for the scanner, sensor, and optics. The scanner unit offers three geometries with automated COBOT-based controls or through a 3-axis translation structure, depending on the geometry of the object under inspection.

The choice of sensor operating frequency range is tied to the expected performance on the material being inspected, required dynamic range, and expected resolution. Sensors are available in three different operating frequencies: 120 GHz, 240 GHz, and 300 GHz. Lastly, the available optics allow for adjustment of working distances. 

Helicoidal head with a sensor and two lenses, from top to bottom

Our expertise guides you to find the optimal configuration for your inspection needs. Advanced configurations can be found on:

To reach optimal performances in terms of dynamic range and measurement repeatability with all sensors, each measurement procedure initiates with a fully automated calibration of the used transceiver. Either through the 3-axis plotter or through the COBOT arm control, such a quick calibration procedure ensures typically more than 60 dB dynamic range.

The signal before (left) and after (right) auto-calibration 

Terascan comes with a dedicated software that is designed to simplify the use of the system and enable advanced visualizations. The software has a user-friendly interface that makes it easy to handle the scanner and configure the imaging procedure. It also displays real-time signal visualization and ongoing scan visualization and progress. Teravisio is an add-on software that provides advanced data processing for 3D visualization of samples and image exports. The user can access raw measurement data sets for tailored post-processing.