Breakthrough: First Terahertz Line Scanner with Integrated Detector

The Ferdinand-Braun-Institut in Berlin has made a significant breakthrough in the realm of industrial scanning technology by developing a cutting-edge terahertz line scanner specifically designed for plastic components.

The innovative in-line terahertz scanner is a game-changer, as it allows for larger and more cost-effective scan line lengths to be achieved in industrial settings. The sensors powering this groundbreaking technology are based on FBH's GaN-HEMT microwave process, showcasing the institute's commitment to pushing the boundaries of what is possible in the field of terahertz scanning.

Through a collaborative effort with the Goethe-Leibniz-Terahertz-Center, the terahertz scanner boasts antenna structures integrated on the chip, enabling efficient and cost-effective scaling of chip production to accommodate larger scan line lengths. The detector spacing, defined on the chip, is significantly smaller than traditional implementations, resulting in enhanced image resolution.

The detector head of the terahertz line scanner comprises a 6 cm long detector line, consisting of 20 individual chips with four THz detectors on each chip, totaling 80 detectors. These detectors are strategically arranged at a distance of 640 µm, and depending on the terahertz source chosen, can operate within the frequency range of 100 GHz to up to 1.5 THz.

Each THz detector signal is meticulously amplified and digitized with a remarkable resolution of 16 bits. The line's readout speed can reach up to an impressive 15,000 images per second, providing high-speed and accurate measurements with a bandwidth of at least 2 GHz.

For instance, conducting measurements at 110 GHz with a sampling rate of 5,000 images per second showcases the scanner's exceptional recording speed, capturing data in less than a second at a conveyor speed of 0.25 meters per second. This efficiency solidifies the terahertz line scanner as a cost-effective and reliable solution for various industrial applications.

The technology demonstrator featuring the novel detector head is designed to scan plastic parts on a conveyor belt. The conveyor belt, measuring 27 centimeters wide, can be adjusted to varying speeds, reaching up to 1.5 meters per second, demonstrating the versatility and adaptability of this cutting-edge scanning technology.

For more information, visit www.fbh-berlin.de