3D reconstruction using 0.1THz Bessel CT imaging system

Zero-order terahertz Bessel beams are diffractom-free. Therefore, unlike the traditional Gaussian beam CT, the terahertz zero-order Bessel beam used in terahertz CT imaging can improve the depth of field of the imaging system. At the same time, the imaging system has high lateral resolution. Bessel beam CT was used to scan a variety of samples at the same time and the reconstruction results were obtained. The reconstructed sections and three-dimensional structures of the scanned samples were clearly seen.