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

Juho Luomahaara (Corresponding author), Aki Mäyrä, Mika Aikio, Hannu Sipola, Leif Grönberg, Andrey Timofeev, Kirsi Tappura, Anssi Rautiainen, Juha Ala-Laurinaho, Aleksi Tamminen, Mikko Leivo, Feng Gao, Hannu Vasama, Arttu Luukanen, Juha Hassel

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


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.
Original languageEnglish
Title of host publicationMillimetre Wave and Terahertz Sensors and Technology XIII
EditorsNeil A. Salmon, Frank Gumbmann
Place of PublicationBellingham
PublisherInternational Society for Optics and Photonics SPIE
Number of pages9
ISBN (Print)978-1-5106-3895-2
Publication statusPublished - 20 Sept 2020
MoE publication typeA4 Article in a conference publication
EventMillimetre Wave and Terahertz Sensors and Technology XIII: Online - Virtual, United Kingdom
Duration: 21 Sept 202025 Sept 2020

Publication series

SeriesProceedings of SPIE


ConferenceMillimetre Wave and Terahertz Sensors and Technology XIII
Country/TerritoryUnited Kingdom


The research has received funding from the European Space Agency (ESA) through Contract No. GSTP 4000115091/15/NL/AF “Large-area staring kinetic inductance focal plane array operating at elevated temperature” and was also supported by the Academy of Finland through Grant Nos. 314447 and 317844.


  • Double-Gauss lens
  • Optics
  • THz imaging system


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