Safe VISITOR: visible, infrared, and terahertz object recognition for security screening application

May, T.; Zieger, Gabriel; Anders, S.; Zakosarenko, V.; Meyer, H.‐G.; Schubert, Matthias; Starkloff, M.; Rößler, M.; Thorwirth, G.; Krause, U.

doi:10.1117/12.818524

Cited by 20 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these scenarios the contrast in Fig. 19.1 Passive indoor imaging at (a) 94 GHz [7], (b) 350 GHz [8], (c) 600 GHz (wearing glasses) [9] and (d) broadband (0.2 −1 THz) [10]. The increase in the visibility of clothing is apparent when moving from the lower to the higher frequencies, by the change in contrast of shirt collars and seams(White-is-"hot") the image arises from the difference between the illumination from the building and that from the human body, which may be typically ∼20 • C. An example of such imagery is shown in Fig.…”

Section: Passive Mmw Imaging Phenomenologymentioning

confidence: 95%

“…The optical configuration is quite compact, a common merit of the Cassegrain telescope, but it has a somewhat limited radial FOV of 5 • , corresponding to 1.6-10 m. The system design bandwidth is from 335 to 375 GHz, defined by a set of bandpass filters, and it can be run at frame rates up to 10 Hz. [8,71] …”

Section: Jena/ipht Safe-visitormentioning

confidence: 98%

“…The SAFE-VISITOR passive camera prototype also utilizes cryogenic microbolometers [8,71]. The sensors are configured in a circular array of 20 detectors and are operated within a commercial dry 4 He/ 3 He sorption cooler at a bath temperature of 0.3 K. As bolometers improve quickly with temperature, the electrical NEP of the bolometers is ∼1 × 10 −16 W/ √ Hz.…”

Section: Jena/ipht Safe-visitormentioning

confidence: 99%

See 2 more Smart Citations

Millimeter-Wave and Terahertz Imaging in Security Applications

Luukanen

Appleby

Kemp³

et al. 2012

Springer Series in Optical Sciences

View full text Add to dashboard Cite

The relatively short wavelength of mm-wave and THz radiation coupled with good transmission through many dielectric materials allows images to be formed of concealed objects. This chapter gives an overview of the detectors, their associated circuitry, and system developments over the past 10 years, focussing on personnel security screening. We will discuss the phenomenology of imaging at these wavelengths, introduce the reader to the basic architectures being used and developed for image forming instruments, show examples of systems, and also discuss the feasibility of spectroscopic THz imaging for security screening applications.

show abstract

Section: Passive Mmw Imaging Phenomenologymentioning

confidence: 95%

Section: Jena/ipht Safe-visitormentioning

confidence: 98%

Section: Jena/ipht Safe-visitormentioning

confidence: 99%

See 1 more Smart Citation

Millimeter-Wave and Terahertz Imaging in Security Applications

Luukanen

Appleby

Kemp³

et al. 2012

Springer Series in Optical Sciences

View full text Add to dashboard Cite

show abstract

“…Multi-spectral imaging exploits different contrast mechanisms and data-fusion in order to extract more information from a scene than is available in any single spectral band alone [1][2][3][4]. Imaging technology uses different materials, suitable to the wavelength of operation to make band selective imagers.…”

Section: Introductionmentioning

confidence: 99%

Hybridization of optical plasmonics with terahertz metamaterials to create multi-spectral filters

et al. 2013

View full text Add to dashboard Cite

Multi-spectral imaging systems typically require the cumbersome integration of disparate filtering materials in order to work simultaneously in multiple spectral regions. We show for the first time how a single nano-patterned metal film can be used to filter multi-spectral content from the visible, near infrared and terahertz bands by hybridizing plasmonics and metamaterials. Plasmonic structures are well-suited to the visible band owing to the resonant dielectric properties of metals, whereas metamaterials are preferable at terahertz frequencies where metal conductivity is high. We present the simulated and experimental characteristics of our new hybrid synthetic multi-spectral material filters and demonstrate the independence of the metamaterial and plasmonic responses with respect to each other. 4755-4767 (1995). 40. M. Naftaly and R. E. Miles, "Terahertz time-domain spectroscopy of silicate glasses and the relationship to material properties," J.

show abstract

“…A single image that combines data from multiple wavebands can convey more information than individual images at each wavelength. [1][2][3][4] The diversity of materials required for imaging separate spectral bands mean that current wide-band multi-spectral imaging systems must use a range of different cameras. For example, a common digital camera uses silicon photodiodes as part of a complementary metal-oxide semiconductor (CMOS) chip, whereas an IR detector requires a different semiconductor material, such as indium antimonide (InSb), to act as a photodiode.…”

mentioning

confidence: 99%