Dr. Aleksi A. Tamminen Profile

Dr. Aleksi A. Tamminen

at Aalto University

SPIE Involvement:

Conference Program Committee | Author

Publications (16)

Proceedings Article | 14 June 2023 Presentation + Paper

Ghost imaging at submillimeter waves: correlation and machine learning methods

Aleksi Tamminen, Samu-Ville Pälli, Juha Ala-Laurinaho, Sazan Rexhepi, Zachary Taylor

Proceedings Volume 12535, 125350S (2023) https://doi.org/10.1117/12.2663776

KEYWORDS: Reflection, Neural networks, Image quality, Holograms, Reflectors

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Proceedings Article | 14 June 2023 Presentation + Paper

Imaging experiments with a 340-GHz FMCW radar and frequency-diverse holograms

Samu-Ville Pälli, Aleksi Tamminen, Paavo Hiltunen, Sazan Rexhepi, Marlene Bonmann, Tomas Bryllert, Duncan Robertson, Juha Ala-Laurinaho, Jan Stake, Zachary Taylor

Proceedings Volume 12535, 125350M (2023) https://doi.org/10.1117/12.2663757

KEYWORDS: Neural networks, Imaging systems, Holograms, Radar, Cameras, Visible radiation, Transceivers, Radar signal processing, Image restoration

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Proceedings Article | 3 June 2022 Presentation + Paper

Submillimeter-wave holograms and imaging neural network: experiments at 220-330 GHz

Samu-Ville Pälli, Paavo Hiltunen, Milla Kosonen, Aleksi Tamminen, Juha Ala-Laurinaho, Zachary Taylor

Proceedings Volume 12111, 1211109 (2022) https://doi.org/10.1117/12.2618274

KEYWORDS: Holograms, Neural networks, Imaging systems

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Proceedings Article | 3 June 2022 Poster + Paper

Cross polarization and aberrations with Dragonian and equivalent off-axis parabolic mirrors for beam collimation in THz imaging systems

Pouyan Rezapoor, Aleksi Tamminen, Juha Ala-Laurinaho, Shahab Oddin Dabironezare, Nuria Llombart, Zachary Taylor

Proceedings Volume 12111, 121110M (2022) https://doi.org/10.1117/12.2627020

KEYWORDS: Reflectors, Sensors, Polarization, Optical simulations, Imaging systems, Gaussian beams, Collimation, Off axis mirrors, Mirrors, Antennas

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Proceedings Article | 20 September 2020 Presentation + Paper

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

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

Proceedings Volume 11541, 1154105 (2020) https://doi.org/10.1117/12.2573891

KEYWORDS: Terahertz radiation, Imaging systems, Video, Cameras, Sensors, Detector arrays, Inductance, Image sensors, Signal to noise ratio, Bolometers

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Proceedings Article | 23 April 2020 Presentation

A fully-staring THz video camera for concealed object detection (Conference Presentation)

Juho Luomahaara, Hannu Sipola, Leif Grönberg, Andrey Timofeev, Kirsi Tappura, Mika Aikio, Aki Mäyrä, Anssi Rautiainen, Visa Vesterinen, Mikko Leivo, Feng Gao, Hannu Vasama, Aleksi Tamminen, Arttu Luukanen, Juha Hassel

Proceedings Volume 11411, 114110J (2020) https://doi.org/10.1117/12.2558047

KEYWORDS: Terahertz radiation, Video, Cameras, Imaging systems, Sensors, Detector arrays, Inductance, Multiplexing, Image sensors, Signal to noise ratio

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Proceedings Article | 23 April 2020 Presentation + Paper

Holograms with neural-network backend for submillimeter-wave beamforming applications

Aleksi Tamminen, Samu-Ville Pälli, Juha Ala-Laurinaho, Arthur Aspelin, Akseli Oinaanoja, Zachary Taylor

Proceedings Volume 11411, 114110C (2020) https://doi.org/10.1117/12.2557754

KEYWORDS: Holograms, Wavelets, Neural networks, Sensors, Picosecond phenomena, Terahertz radiation, Finite-difference time-domain method, Antennas, Reflectors, Wave propagation

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Proceedings Article | 6 April 2020 Paper

Submillimeter-wave imaging assisted alignment of millimeter-wave spectroscopic system for quantification of corneal water content

Mariangela Baggio, Yong Hu, Aleksi Tamminen, Irina Nefedova, Juha Ala-Laurinaho, Zachary Taylor

Proceedings Volume 11348, 113480M (2020) https://doi.org/10.1117/12.2556309

KEYWORDS: Cornea, Objectives, Mirrors, Imaging systems, Extremely high frequency, Spectroscopy, Imaging spectroscopy, Gaussian beams, Physiology, Electromagnetism

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Proceedings Article | 11 May 2018 Paper

Dual-band submillimeter-wave kinetic inductance bolometers and an imaging system for contraband object detection

Juha Hassel, Shahab Oddin Dabironezare, Erio Gandini, Leif Grönberg, Hannu Sipola, Anssi Rautiainen, Aleksi Tamminen, Mikko Leivo, Hannu Lindström, Hannu Vasama, Arttu Luukanen, Nuria Llombart

Proceedings Volume 10634, 106340F (2018) https://doi.org/10.1117/12.2304722

KEYWORDS: Sensors, Imaging systems, Inductance, Bolometers, Cryogenics, Dielectrics, Signal detection, Radiometry, Optical filters

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Proceedings Article | 12 May 2016 Paper

Phenomenology of passive multi-band submillimeter-wave imagery

Sissi Enestam, Perttu Kajatkari, Olli Kivimäki, Mikko Leivo, Anssi Rautiainen, Aleksi Tamminen, Arttu Luukanen

Proceedings Volume 9830, 98300B (2016) https://doi.org/10.1117/12.2229029

KEYWORDS: Imaging systems, Cameras, Argon, Video, Imaging systems, Skin, Staring arrays, Sensors, Bolometers, Point spread functions, Humidity

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Proceedings Article | 9 June 2014 Paper

Developments of a reflectarray and its element characterization at millimeter wavelengths

A. Tamminen, Tom Gallacher, Juha Ala-Laurinaho, A. Räisänen

Proceedings Volume 9078, 907807 (2014) https://doi.org/10.1117/12.2053308

KEYWORDS: Imaging systems, Phase measurement, Phase shifts, Quantization, Spherical lenses, Confocal microscopy, Electroluminescent displays, Antennas, Chemical elements, Phase shifting

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Proceedings Article | 31 May 2013 Paper

Near-field measurements of submillimeter-wave reflectarrays

Aleksi Tamminen, Juha Ala-Laurinaho, Sampo Mäkelä, David Gomes-Martins, Janne Häkli, Päivi Koivisto, Pekka Rantakari, Jussi Säily, Reijo Tuovinen, Arttu Luukanen, Markku Sipilä, Antti Räisänen

Proceedings Volume 8715, 871506 (2013) https://doi.org/10.1117/12.2018606

KEYWORDS: Near field, Antennas, Phase shifts, Specular reflections, Transmitters, Scanners, Silicon, Semiconducting wafers, Radon, Etching

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Proceedings Article | 9 May 2012 Paper

Reflectarray for 120-GHz beam steering application: design, simulations, and measurements

Aleksi Tamminen, Juha Ala-Laurinaho, David Gomes-Martins, Janne Häkli, Päivi Koivisto, Mikko Kärkkäinen, Sampo Mäkelä, Pekka Pursula, Pekka Rantakari, Markku Sipilä, Jussi Säily, Reijo Tuovinen, Mikko Varonen, Kari Halonen, Arttu Luukanen, Antti Räisänen

Proceedings Volume 8362, 836205 (2012) https://doi.org/10.1117/12.924167

KEYWORDS: Phase shifts, Microelectromechanical systems, Switches, Antennas, Radar, Phase modulation, Phase shift keying, Beam steering, Optical simulations, Electronics

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Proceedings Article | 26 May 2011 Paper

Rapid beamsteering reflectarrays for mm-wave and submm-wave imaging radars

Arttu Luukanen, Juha Ala-Laurinaho, David Gomes Martins, Janne Häkli, Päivi Koivisto, Pekka Pursula, Pekka Rantakari, Jussi Säily, Aleksi Tamminen, Reijo Tuovinen, Markku Sipilä

Proceedings Volume 8022, 80220M (2011) https://doi.org/10.1117/12.887068

KEYWORDS: Antennas, Phase shifts, Switches, Chemical elements, Microelectromechanical systems, Radar, Control systems, Imaging systems, Beam steering, Optical components

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Proceedings Article | 27 April 2010 Paper

Indirect holographic imaging: evaluation of image quality at 310 GHz

A. Tamminen, J. Ala-Laurinaho, A. Räisänen

Proceedings Volume 7670, 76700A (2010) https://doi.org/10.1117/12.852414

KEYWORDS: Imaging systems, Signal to noise ratio, Holography, Image resolution, Reflectivity, Point spread functions, Receivers, Image processing, Cell phones, Image quality

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Proceedings Article | 27 April 2010 Paper

Real-time passive terahertz imaging system for standoff concealed weapons imaging

Arttu Luukanen, Leif Grönberg, Markus Grönholm, Petteri Lappalainen, Mikko Leivo, Anssi Rautiainen, Aleksi Tamminen, Juha Ala-Laurinaho, Charles Dietlein, Erich Grossman

Proceedings Volume 7670, 767004 (2010) https://doi.org/10.1117/12.850369

KEYWORDS: Imaging systems, Sensors, Spatial resolution, Terahertz radiation, Data acquisition, Video, Cameras, Scanners, Millimeter wave imaging, Weapons

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Showing 5 of 16 publications

Conference Committee Involvement (3)

Radar Sensor Technology XXVIII

22 April 2024 | National Harbor, Maryland, United States

Radar Sensor Technology XXVII

1 May 2023 | Orlando, Florida, United States

Passive and Active Millimeter-Wave Imaging XXV

6 April 2022 | Orlando, Florida, United States

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