Focus free terahertz reflection imaging and tomography with Bessel beams

S. F. Busch*, G. E. Town, M. Scheller, M. Koch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A broadband terahertz (THz) reflection imaging system with high spatial resolution over a large depth of field is reported. A THz axicon lens producing a truncated THz Bessel beam with a linear focus exceeding 120 mm in length, and with the diameter of the central lobe less than 2 mm was used for imaging in a reflection geometry employing a pulsed THz time-domain spectrometer. With numerical post-processing, it was possible to reconstruct the three dimensional shape of the scanned object.

Original languageEnglish
Pages (from-to)318-326
Number of pages9
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume36
Issue number3
DOIs
Publication statusPublished - Mar 2015

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