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Compressed Sensing in a Fully Non-Mechanical 350 GHz Imaging Setting

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Abstract

We investigate a single-pixel camera (SPC) that relies on non-mechanical scanning with a terahertz (THz) spatial light modulator (SLM) and Compressed Sensing (CS) for image generation. The camera is based on a 350 GHz multiplier source and a Golay cell detector. The SLM consists of a Germanium disc, which is illuminated by a halogen lamp. The light of the lamp is transmitted through a thin-film transistor (TFT) liquid crystal display (LCD). This enables the generation of light patterns on the Germanium disc, which in turn produce reflecting patterns for THz radiation. Using up to 1000 different patterns the pseudo-inverse reconstruction algorithm and the CS algorithm CoSaMP are evaluated with respect to image quality. It is shown that CS allows a reduction of the necessary measurements by a factor of three without compromising the image quality.

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Acknowledgements

The research presented here was partly funded by the European Metrology Research Program (EMRP – Project NEW07 Microwave and terahertz metrology for homeland security). The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.

S. Augustin and J. Hieronymus gratefully acknowledge support by the Helmholtz Research School on Security Technologies (HRSST).

All authors are grateful to Alessandro Maturilli for conducting the spectrometer measurements presented in Fig. 2.

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Authors and Affiliations

  1. Technical University Berlin - Institute of Optics and Atomic Physics, Straße des 17. Juni 135, 10623, Berlin, Germany

    S. Augustin & H.-W. Hübers

  2. German Aerospace Center Berlin - Adlershof, Rutherfordstraße 2, 12489, Berlin, Germany

    J. Hieronymus & H.-W. Hübers

  3. Technical University Berlin - Communications and Information Theory Group, Einsteinufer 25, 10587, Berlin, Germany

    P. Jung

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  1. S. Augustin
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Correspondence to S. Augustin.

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Augustin, S., Hieronymus, J., Jung, P. et al. Compressed Sensing in a Fully Non-Mechanical 350 GHz Imaging Setting. J Infrared Milli Terahz Waves 36, 496–512 (2015). https://doi.org/10.1007/s10762-014-0141-5

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