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Proceedings Paper

Optical design for translation of THz medical imaging technology
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Paper Abstract

This paper presents novel a first pass on the thorough analysis of THz optical designs intended for image acquisition of burn wounds in animal models. Current THz medical imaging research typically employs and fixed source detector architecture coupled by a train of off-axis parabolic mirrors. When used individually, parabolic mirrors have near diffraction limited focusing properties, extremely low loss, and are dispersion free. However, when a combination or train of multiple parabolic mirrors are utilized geometric errors can be generated early in the train and exacerbated as the beam propagates to the detector. These errors manifest as significant increases in spot size, asymmetries about the optical axis in beam irradiance and polarization, and the generation of cross polarization components. This work presents a novel configuration of off-axis parabolic mirrors designed to maximize the practicality of beam alignment and image acquisition. Quasi-physical optics simulations of the optical performance are described and significant perturbations in polarization symmetry were observed. The configuration can be described as in between two canonical parabolic mirror configurations. The performance of three different pairs of off-axis parabolic mirror pairs coupled to the novel configuration are presented herein.

Paper Details

Date Published: 2 April 2014
PDF: 8 pages
Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 89850H (2 April 2014); doi: 10.1117/12.2045638
Show Author Affiliations
Zachary D. Taylor, Univ. of California, Los Angeles (United States)
Technische Univ. Delft (Germany)
Shijun Sung, Technische Univ. Delft (Germany)
James Garritano, Univ. of California, Los Angeles (United States)
Neha Bajwa, Univ. of California, Los Angeles (United States)
Bryan Nowroozi, Univ. of California, Los Angeles (United States)
Nuria Llombart, Technische Univ. Delft (Netherlands)
Priyamvada Tewari, Univ. of California, Los Angeles (United States)
Warren S. Grundfest, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 8985:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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