Experimental verification of active IR stealth technology by controlling the surface temperature using a thermoelectric element

Kim, Donggeon; Han, Kuk-Il; Choi, Jun-Hyuk; Kim, Tae-Kuk

doi:10.1007/s12206-016-0952-5

Cited by 16 publications

(5 citation statements)

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“…Thus, dynamic control of the temperature or thermal emittance of the object offers two possible approaches to attain adaptive thermal camouflage. For dynamic control of the temperature, microfluidic networks (5) and thermoelectric systems (6,7) have been proposed. Although remarkable temperature regulations have been reached by them, the former necessitates complex heating, cooling, and pneumatic systems, whereas the latter encounters high energy consumption and serious heat accumulation problems.…”

Section: Introductionmentioning

confidence: 99%

Manipulating metals for adaptive thermal camouflage

et al. 2020

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Many species in nature have evolved remarkable strategies to visually adapt to the surroundings for the purpose of protection and predation. Similarly, acquiring the capabilities of adaptively camouflaging in the infrared (IR) spectrum has emerged as an intriguing but highly challenging technology in recent years. Here, we report adaptive thermal camouflage devices by bridging the optical and radiative properties of nanoscopic platinum (Pt) films and silver (Ag) electrodeposited Pt films. Specifically, these metal-based devices have large, uniform, and consistent IR tunabilities in mid-wave IR (MWIR) and long-wave IR (LWIR) atmospheric transmission windows (ATWs). Furthermore, these devices can be easily multiplexed, enlarged, applied to rough and flexible substrates, or colored, demonstrating their multiple adaptive camouflaging capabilities. We believe that this technology will be advantageous not only in various adaptive camouflage platforms but also in many thermal radiation management–related technologies.

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Section: Introductionmentioning

confidence: 99%

Manipulating metals for adaptive thermal camouflage

et al. 2020

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“…The flame temperature of the fire spray gun has a maximum temperature above 1000 K (approximately to the tail flame of an aircraft turbine engine) . The heating platform is heated to 400 K to make the temperature of the surrounding environment close to the temperature of the infrared object (simulating infrared tracer interference on the battlefield) . The humidifier and the shading material are located between the infrared object and the infrared imager.…”

Section: Resultsmentioning

confidence: 99%

“…52 The heating platform is heated to 400 K to make the temperature of the surrounding environment close to the temperature of the infrared object (simulating infrared tracer interference on the battlefield). 53 The humidifier and the shading material are located between the infrared object and the infrared imager. In this case, the humidifier produces a water mist, and the shading material blocks about 95% of the infrared light.…”

Section: Application Testing and Analysismentioning

confidence: 99%

Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments

Ding

Liu

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Due to the extreme complexity of the anti-reflective subwavelength structure (ASS) parameters and the drastic limitation of Gaussian beam manufacturing accuracy, it remains a great challenge to manufacture ASS with ultrahigh transmittance on the surface of infrared window materials (such as magnesium fluoride (MgF2)) directly by femtosecond laser. Here, a design, manufacturing, and characterization method that can produce an ultrahigh-performance infrared window by femtosecond laser Bessel beam is proposed. Inspired by the excellent anti-reflective and hydrophobic properties of the special structure of dragonfly wings, a similar structural pattern with grid-distributed truncated cones is designed and optimized for its corresponding parameters to achieve near-full transmittance. The desired submicron structures are successfully fabricated by a Bessel beam after effectively shaping the beam. As a practical application, the bioinspired ASS is manufactured on the surface of MgF2, achieving an ultrahigh transmittance of 99.896% in the broadband of 3–5 μm, ultrawide angle of incidence (over 70% at 75° incidence), and good hydrophobicity with a water contact angle of 99.805°. Results from infrared thermal imaging experiments show that the ultrahigh-transmittance MgF2 window has superior image acquisition and anti-interference performance (3.9–8.6% image contrast enhancement and more accurate image edge recognition) in an environment with multiple interfering factors, which may play a significant role in facilitating applications of infrared thermal imaging technologies in extremely complex environments.

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“…With the advancement of science and technology, infrared detection technology has become increasingly sophisticated. In particular, the advent of infrared detection and remote sensing equipment, with high detection accuracy and high resolution, has caused huge threats to military facilities and weapons [ 1 , 2 , 3 ]. To minimize the difference between the target and the background, it’s necessary to preserve the infrared stealth technology of military targets [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Schiff Base Polymers via Metal Coordination and Its Application in Infrared Stealth Coating

Zong

et al. 2022

Polymers

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In order to reduce the infrared emissivity to meet the requirements of modern warfare for infrared stealth materials, we prepared the polymers containing Schiff base moieties using polyetheramine and 2,6-pyridinedicarboxaldehyde by solution polycondensation and coordinated with Ni2+, Cu2+, and Sm3+ ions to prepare organic coatings. The structure and the thermal and mechanical properties of the coatings were studied in detail. Meanwhile, the effect of the conductivity change of coordination polymers on infrared emissivity was studied systematically. The results showed the polymer coordinated with Sm3+ ions had the lowest energy band gap, which was 2.99 eV, and the best electrical conductivity of 3.54 × 10−4 S/cm compared with Ni2+ and Cu2+ coordination polymers. The infrared emissivity was the lowest in the 2–22 μm infrared waveband range, which reached 0.58, suggesting the polymers containing Schiff base moieties and their coordination polymers may have a great potential to be applied as infrared stealth materials in military applications.

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Experimental verification of active IR stealth technology by controlling the surface temperature using a thermoelectric element

Cited by 16 publications

References 1 publication

Manipulating metals for adaptive thermal camouflage

Manipulating metals for adaptive thermal camouflage

Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments

Synthesis and Characterization of Schiff Base Polymers via Metal Coordination and Its Application in Infrared Stealth Coating

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Experimental verification of active IR stealth technology by controlling the surface temperature using a thermoelectric element

Cited by 16 publications

References 1 publication

Manipulating metals for adaptive thermal camouflage

Manipulating metals for adaptive thermal camouflage

Bioinspired Near-Full Transmittance MgF2 Window for Infrared Detection in Extremely Complex Environments

Synthesis and Characterization of Schiff Base Polymers via Metal Coordination and Its Application in Infrared Stealth Coating

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Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments