Design of a ring-focus dual reflector objective for standoff sensing of spherical targets in the 220 - 330 GHz band

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2022
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en
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IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves, International Conference on Infrared, Millimeter, and Terahertz Waves
Abstract
A dual reflector objective design is explored in WR3.4 for sensing of spherical targets. The secondary mirror shadow enables coaxial integration of topical systems without additional obscuration of the submillimeter wave beam. The system is designed with geometrical optics and evaluated with physical optics. The power coupling efficiency between the source electric field and back scattered field from a spherical target is >0.4 across the frequency of interest.
Description
Funding Information: This work is funded by Academy of Finland RADDESS program (project AGRUM, decision number 327640). We acknowledge the computer resources provided by the Aalto Science IT-Project. Publisher Copyright: © 2022 IEEE.
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Baggio , M , Tamminen , A , Ala-Laurinaho , J , Wallace , V P & Taylor , Z D 2022 , Design of a ring-focus dual reflector objective for standoff sensing of spherical targets in the 220 - 330 GHz band . in IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves . International Conference on Infrared, Millimeter, and Terahertz Waves , IEEE , International Conference on Infrared, Millimeter, and Terahertz Waves , Delft , Netherlands , 28/08/2022 . https://doi.org/10.1109/IRMMW-THz50927.2022.9895473