Inexpensive THz Focal Plane Array Imaging Using Miniature Neon Indicator Lamps as Detectors

Rozban, Daniel; Levanon, Assaf; Joseph, H.; Akram, A.; Abramovich, Amir; Kopeika, Norman S.; Yitzhaky, Yitzhak; Belenky, A.; Pecht, Michael

doi:10.1109/jsen.2011.2108282

Cited by 44 publications

(21 citation statements)

References 16 publications

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“…Cascade ionization which increases the current in the plasma [7] and enhanced diffusion current that decreases it [8]. This property of the GDD was shown experimentally to be in excellent agreement with the theoretical model of the GDD operation [6][7][8][9][10]. The inexpensive price, high relative response (similar to Golay cells, pyroelectric detectors, bolometers, etc.…”

Section: Introductionsupporting

confidence: 63%

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Feasibility of Radon projection acquisition for compressive imaging in MMW region based new video rate 16×16 GDD FPA camera

Levanon

Konstantinovsky

Kopeika

et al. 2015

Passive and Active Millimeter-Wave Imaging XVIII

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In this article we present preliminary results for the combination of two interesting fields in the last few years: 1) Compressed imaging (CI), which is a joint sensing and compressing process, that attempts to exploit the large redundancy in typical images in order to capture fewer samples than usual. 2) Millimeter Waves (MMW) imaging. MMW based imaging systems are required for a large variety of applications in many growing fields such as medical treatments, homeland security, concealed weapon detection, and space technology. Moreover, the possibility to create a reliable imaging in low visibility conditions such as heavy cloud, smoke, fog and sandstorms in the MMW region, generate high interest from military groups in order to be ready for new combat. The lack of inexpensive room temperature imaging sensors makes it difficult to provide a suitable MMW system for many of the above applications. A system based on Glow Discharge Detector (GDD) Focal Plane Arrays (FPA) can be very efficient in real timeimaging with significant results. The GDD is located in free space and it can detect MMW radiation almost isotropically. In this article, we present a new approach of reconstruction MMW imaging by rotation scanning of the target. The Collection process here, based on Radon projections allows implementation of the compressive sensing principles into the MMW region. Feasibility of concept was obtained as radon line imaging results. MMW imaging results with our resent sensor are also presented for the first time. The multiplexing frame rate of 16x16 GDD FPA permits real time video rate imaging of 30 frames per second and comprehensive MMW imaging. It uses commercial GDD lamps with diameter, Ne indicator lamps as pixel detectors. Combination of these two fields should make significant improvement in MMW region imaging research, and new various of possibilities in compressing sensing technique.

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Section: Introductionsupporting

confidence: 63%

“…Application based MMW, as described above are well needed. Previous works of using very inexpensive Glow Discharge Detectors (GDD) in W-band were performed and presented [6][7][8][9][10][11][12][13][14][15]. The GDD is a low-pressure miniature neon indicator lamp.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Radon projection acquisition for compressive imaging in MMW region based new video rate 16×16 GDD FPA camera

Levanon

Konstantinovsky

Kopeika

et al. 2015

Passive and Active Millimeter-Wave Imaging XVIII

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“…It was shown that it is possible to detect metallic materials, and interpolate over the image with the assistance of DSP algorithms. A quasi optical system for the detector FPA was also designed, and various kinds of imaging were demonstrated [16]- [19]. Lab VIEW controlling software permits graphical algorithm display and image processing.…”

Section: Introductionmentioning

confidence: 99%

Calibration Method for MMW Imaging Using Inexpensive Miniature Neon Indicator Lamp Detectors

et al. 2014

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We have developed focal plan array (FPA) imagers based on very inexpensive miniature neon indicator lamp detectors called glow discharged detectors (GDDs). The novelty of this paper is a technique of calibration, which permits reliable imaging with such an inexpensive FPA. GDDs are commercial lamps, which lack uniformity as detectors. The technique developed in this paper cancels out differences in response between the FPA lamps caused by both nonuniformity of the MMW collimated beam, and nonuniformity of the GDDs and other components in the electronic circuit. Utilizing this method in the new imaging system unifies detector response. Results, shown with two types of sensor configurations (8 × 8 and 18× 2 scanner array), indeed show better performances and improvement in visibility of details.

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“…In order to image these threats there is a great need to develop rapid imaging systems based on array detectors. 5,6 Although current array detector technologies that work in the millimeter wave to terahertz frequency range suffer from noise levels as compared to single-pixel detectors which can be an added disadvantage when imaging cluttered scenes. As these technologies continue to develop at a rapid pace, due to these limitations typical imaging architectures in the frequency range still utilize point scanning schemes where the detector and transmitter are in either mono-static or bi-static configurations.…”

Section: Introductionmentioning

confidence: 99%

Image reconstruction and optimization using a terahertz scanned imaging system

Yildirim

Ozkan

İdikut

et al. 2014

Electro-Optical Remote Sensing, Photonic Technologies, and Applications VIII; And Military Applications in Hyperspectral Imagin

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Due to the limited number of array detection architectures in the millimeter wave to terahertz region of the electromagnetic spectrum, imaging schemes with scan architectures are typically employed. In these configurations the interplay between the frequencies used to illuminate the scene and the optics used play an important role in the quality of the formed image. Using a multiplied Schottky-diode based terahertz transceiver operating at 340 GHz, in a stand-off detection scheme; the effect of image quality of a metal target was assessed based on the scanning speed of the galvanometer mirrors as well as the optical system that was constructed. Background effects such as leakage on the receiver were minimized by conditioning the signal at the output of the transceiver. Then, the image of the target was simulated based on known parameters of the optical system and the measured images were compared to the simulation. By using an image quality index based on χ 2 algorithm the simulated and measured images were found to be in good agreement with a value of χ 2 = 0 .14. The measurements as shown here will aid in the future development of larger stand-off imaging systems that work in the terahertz frequency range.

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Inexpensive THz Focal Plane Array Imaging Using Miniature Neon Indicator Lamps as Detectors

Cited by 44 publications

References 16 publications

Feasibility of Radon projection acquisition for compressive imaging in MMW region based new video rate 16×16 GDD FPA camera

Feasibility of Radon projection acquisition for compressive imaging in MMW region based new video rate 16×16 GDD FPA camera

Calibration Method for MMW Imaging Using Inexpensive Miniature Neon Indicator Lamp Detectors

Image reconstruction and optimization using a terahertz scanned imaging system

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