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Design of a quasioptical scanning system for a fast mobile FMCW terahertz imaging system

: Mohammadzadeh, Shiva; Friederich, Fabian

Volltext ()

Institute of Physics -IOP-, London:
Smart Nanomaterials. Advances, Innovation and Applications, SNAIA 2019 : 10-13 December 2019, Paris, France
Bristol: IOP Publishing, 2020 (Journal of physics. Conference series 1537)
Art. 012017, 5 S.
Conference "Smart Nanomaterials - Advances, Innovation and Applications" (SNAIA) <2019, Paris>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ITWM ()

Radar systems based on frequency-modulated continuous-wave (FMCW) technique are used in 3D terahertz imaging setups to construct volumetric images of dielectric samples in order to reveal internal structures and defects. In some applications, a mobile imaging system is preferred, to carry to the sample under test (SUT). We have integrated a single FMCW transceiver unit with opto-mechanical components to obtain 3D information faster, compared to single-point measurements with raster scan. A scanning module with aspherical telecentric f-0 lens as an optical objective system and a galvanometer scanner mirror are designed.