Abstract
We present new results demonstrating the capability of performing computed tomography (CT) using broadband Bessel terahertz (THz) beams. Nondiffractive beams such as these exhibit propagation-invariant lines of focus with an extended depth-of-field compared to conventional Gaussian beams. Using this property, we demonstrate a considerable improvement in the 3D reconstruction image of a synthetic sample through the backprojection algorithm. Only when THz Bessel beams are used, a full reconstruction of the object structure is made. Moreover, we use phase-contrast mechanism which improves the spatial resolution and reconstructed images. Our results highlight the potential in using nondiffractive Bessel beams to significantly improve 3D-image reconstruction of THz CT.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Assaf Bitman, Inon Moshe, and Zeev Zalevsky
Opt. Lett. 37(19) 4164-4166 (2012)
Bradley Ferguson, Shaohong Wang, Doug Gray, Derek Abbot, and X.-C. Zhang
Opt. Lett. 27(15) 1312-1314 (2002)
Lars-Paul Lumbeeck, Pavel Paramonov, Jan Sijbers, and Jan De Beenhouwer
Appl. Opt. 62(17) F31-F40 (2023)