A fully-staring THz video camera with wide field-of-view and close-looking optics

We present a passive, fully-staring THz imaging system for security screening purposes. The camera is equipped with a multi-kilo-pixel detector array of kinetic inductance bolometers, cryogenics operating above 5 K, and a multiplexed low-noise electronics to readout the whole detector array. After briefly describing the system, we concentrate on the optical system of the instrument. We discuss the trade-offs related to the optics and justify the adopted lens material and design. Furthermore, we show measurement results characterizing the related optical performance.

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Double-Gauss lens, Optics, THz imaging system

DOI

10.1117/12.2573891

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Luomahaara, J, Mäyrä, A, Aikio, M, Sipola, H, Grönberg, L, Timofeev, A, Tappura, K, Rautiainen, A, Ala-Laurinaho, J, Tamminen, A, Vesterinen, V, Leivo, M, Gao, F, Vasama, H, Luukanen, A & Hassel, J 2020, A fully-staring THz video camera with wide field-of-view and close-looking optics . in N A Salmon & F Gumbmann (eds), Millimetre Wave and Terahertz Sensors and Technology XIII ., 1154105, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11541, SPIE, Millimetre Wave and Terahertz Sensors and Technology, Virtual, Online, United Kingdom, 21/09/2020 . https://doi.org/10.1117/12.2573891

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https://urn.fi/URN:NBN:fi:aalto-202011066378

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[article-cris] Sähkötekniikan korkeakoulu / ELEC

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A fully-staring THz video camera with wide field-of-view and close-looking optics

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