New Ultra-Fast Sub-Terahertz Linear Scanner for Postal Security Screening

Shchepetilnikov, A. V.; Gusikhin, P. A.; Muravev, V. M.; Tsydynzhapov, G. E.; Nefyodov, Yu. A.; Dremin, A. A.; Кукушкин, И. В.

doi:10.1007/s10762-020-00692-4

Cited by 33 publications

(19 citation statements)

References 35 publications

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“…One of the first commercial terahertz scanners for postal security applications was introduced by TeraSense Group, Inc 9 . The scanner has a 100-GHz 80-mW IMPATT-diode source and a linear camera with a 1×256 detector array with a dynamic range of the scanner of about 40 dB and a resolution of 5 mm.…”

Section: Previous Workmentioning

confidence: 99%

Study of object detection in linear terahertz imaging systems

Kovbasa,

Golenkov,

Shevchik-Shekera

et al. 2023

Opt. Eng.

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A neural network-based system designed for automated detection of concealed items using a postal terahertz scanner is presented, with system optimization provided. A dataset of objects scanned by a THz scanner is introduced. A convolutional neural network is trained on this dataset of terahertz images to classify and detect whether an image contains a prohibited item or not. The system is tested using realworld samples, achieving an accuracy of 95.5% mAP@0.5. The results demonstrate the effectiveness of employing a neural network in postal terahertz scanners and its potential for use in security and surveillance applications.

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Section: Previous Workmentioning

confidence: 99%

Study of object detection in linear terahertz imaging systems

Kovbasa,

Golenkov,

Shevchik-Shekera

et al. 2023

Opt. Eng.

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“…Since many crystalline substances like explosives, drugs, or chemicals are showing characteristic absorption bands-so-called fingerprints-in the terahertz spectral range, they can be identified using terahertz time-domain spectroscopy (TDS) [10][11][12][13][14][15]. These are the reasons why several groups working in the field of terahertz technology are developing and investigating mail scanning systems together with partners from industry and public authorities [16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Mail Inspection Based on Terahertz Time-Domain Spectroscopy

Molter

Hübsch²,

Sprenger³

et al. 2021

Applied Sciences

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“…5 Sub-THz imaging systems based on impact ionization transit time (IMPATT) diodes and plasmonic array detectors 6 offered by Terasense arguably are the best tool for realtime imaging applications in the sub-THz spectral range between 50 and 300 GHz available on the market. 7,8 They offer reasonable sensitivity, resolution, and speed of operation, yet are rather compact, energy efficient and easy in installation. However, they require precise alignment of the numerous quasi optical elements and can not provide both high resolution and stand-off operation simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Assessment of cameras for continuous wave sub-terahertz imaging

Gorodetsky

Freer

Navarro‐Cía

2020

Terahertz Emitters, Receivers, and Applications XI

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In this contribution, we present the direct comparison between Ophir Pyrocam IV and Terasense Tera-1024 cameras used for imaging of terahertz (THz) and sub-THz signals. We compare general properties, such as frequency dependent and polarisation dependent sensitivity, angle dependent sensitivity essential for holographic and noncollinear interferometric measurements, and draw a conclusion about the most suitable camera for the discussed imaging approaches. Both cameras show acceptable performance and sensitivity at imaging both 0.14 THz and 0.3 THz signals. The Terasense camera, expectedly, shows stronger polarisation dependent properties, however, is significantly more angle independent, showing an acceptable performance at all tested incident angles up to 50 degrees. At the same time, although the angle dependence is stronger for the Ophir camera, it has smaller pixel pitch and more extended post-processing features, thus making it somewhat better suited for noncollinear interferometric and holographic sub THz imaging.

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New Ultra-Fast Sub-Terahertz Linear Scanner for Postal Security Screening

Cited by 33 publications

References 35 publications

Study of object detection in linear terahertz imaging systems

Study of object detection in linear terahertz imaging systems

Mail Inspection Based on Terahertz Time-Domain Spectroscopy

Assessment of cameras for continuous wave sub-terahertz imaging

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