EO/IR imaging systems countermeasures and camouflage: capabilities and new technological challenges

Livada, Branko; Peric, Dragana

doi:10.1117/12.2573469

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Currently, there is a huge development of electro-optical infrared (EO-IR) devices for various applications, including situational awareness, self-defense and surveillance in aerospace. [1][2][3] Overall, while advancements are being made, larger constraints in size and weight are required, especially with the prevalence of Unmanned Aerial Vehicle (UAV) technology. Generally, EO-IR devices have various optical lenses, each with the requirement to transmit a certain section of wavelengths.…”

Section: Introduction 11 Optics For Electro-optical Infrared Devicesmentioning

confidence: 99%

Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Archer

Craig

et al. 2023

Window and Dome Technologies and Materials XVII

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Gallium Lanthanum sulphur-oxide (GLSO) glass is an excellent candidate for a window/dome material ought to its wideband transmission window from visible to MWIR. The suitable optical transmission from 0.45-8 microns is supplemented by its superior thermal and mechanical properties to contemporary materials, such as Cleartran™ zinc sulphide. In this work, the properties of GLSO were enhanced by doping with small concentrations of silicon nitride (≤ 0.5 M%), which expanded the transmission window to encompass all the visible spectra. Nano-indentation demonstrated that the hardness and elastic modulus slightly improved. Overall, the improvements demonstrated here make this glass an even better solution when compared to the state-of-the-art for use in single-optic windows and domes.

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Section: Introduction 11 Optics For Electro-optical Infrared Devicesmentioning

confidence: 99%

Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Archer

Craig

et al. 2023

Window and Dome Technologies and Materials XVII

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“…Various methods have been proposed to address the issue of artificial smoke's impact on visualization systems, including Ligh Detection and Ranging (LiDAR) in combination with single-photon imaging systems 1,6,[11][12][13] . These approaches aim to enhance the quality of the image rendered through the cloud, making it possible to identify the target.…”

mentioning

confidence: 99%

Asymmetric imaging through engineered Janus particle obscurants using a Monte Carlo approach for highly asymmetric scattering media

da Mota,

Sadafi,

Mosallaei

2024

Sci Rep

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The advancement of imaging systems has significantly ameliorated various technologies, including Intelligence Surveillance Reconnaissance Systems and Guidance Systems, by enhancing target detection, recognition, identification, positioning, and tracking capabilities. These systems can be countered by deploying obscurants like smoke, dust, or fog to hinder visibility and communication. However, these counter-systems affect the visibility of both sides of the cloud. In this sense, this manuscript introduces a new concept of a smoke cloud composed of engineered Janus particles to conceal the target image on one side while providing clear vision from the other. The proposed method exploits the unique scattering properties of Janus particles, which selectively interact with photons from different directions to open up the possibility of asymmetric imaging. This approach employs a model that combines a genetic algorithm with Discrete Dipole Approximation to optimize the Janus particles' geometrical parameters for the desired scattering properties. Moreover, we propose a Monte Carlo-based approach to calculate the image formed as photons pass through the cloud, considering highly asymmetric particles, such as Janus particles. The effectiveness of the cloud in disguising a target is evaluated by calculating the Probability of Detection (PD) and the Probability of Identification (PID) based on the constructed image. The optimized Janus particles can produce a cloud where it is possible to identify a target more than 50% of the time from one side (PID > 50%) while the target is not detected more than 50% of the time from the other side (PD < 50%). The results demonstrate that the Janus particle-engineered smoke enables asymmetric imaging with simultaneous concealment from one side and clear visualization from the other. This research opens intriguing possibilities for modern obscurant design and imaging systems through highly asymmetric and inhomogeneous particles besides target detection and identification capabilities in challenging environments.

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A Multispectral Camouflage Net Evaluation Capability

Karli,

Ranete,

Becquaert

et al. 2024

IEEE Access

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EO/IR imaging systems countermeasures and camouflage: capabilities and new technological challenges

Cited by 4 publications

References 29 publications

Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Expanding the transmission window of visible-MWIR chalcogenide glasses by silicon nitride doping

Asymmetric imaging through engineered Janus particle obscurants using a Monte Carlo approach for highly asymmetric scattering media

A Multispectral Camouflage Net Evaluation Capability

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