Mr. Xuesong Deng Profile

Xuesong Deng

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Proceedings Article | 12 April 2023 Paper

Research on visible, infrared, and laser stealth performance of two composite structures

Chenglong Ding, Xuesong Deng

Proceedings Volume 12565, 125650D (2023) https://doi.org/10.1117/12.2661618

KEYWORDS: Composites, Reflectivity, Visible radiation, Infrared radiation, Infrared lasers, Printing, Photonic crystals, Multilayers, Far infrared, Tellurium

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In modern warfare, reconnaissance technology poses a significant threat to targets on the battlefield. Composite structures of the thin film can achieve multiband compatible stealth to protect high-value targets. Previously, thin films for achieving compatible stealth of visible, laser, and infrared bands usually have a large number of total layers and suffer from uneven color rendering in the visible band and color being greatly affected by observation angles. In this paper, we proposed two new composite structures that could improve stealth performance in the visible band while taking into account the stealth effects of laser and infrared bands. The composite structure I is a layer of printing ink with dielectric/metal/dielectric (D/M/D) triple layer film. Composite structure II is a photonic crystal with a layer of printing ink. A single layer of printing ink in both structures acts as a color developer, which leads to a significant reduction in the total layers. The reflectance of the two structures was calculated to be 0.935 and 0.877 in the mid-infrared band and 0.958 and 0.955 in the far-infrared band. The spectral curves show that the two structures are uniform and stable in color and less affected by observation angles, and the reflectance is 0.108 and 0.083 at 1.06 μm at positive incidence. In summary, the two composite structures improve the stealth effect in the visible band while achieving compatible stealth.

Proceedings Article | 12 April 2023 Paper

Research on multi-band compatible stealth film based on D/M/D structure in green circumstance

Chenglong Ding, Xuesong Deng

Proceedings Volume 12565, 125650C (2023) https://doi.org/10.1117/12.2661617

KEYWORDS: Reflectivity, Visible radiation, Far infrared, Thin films, Target detection, Zinc, Structural design, Magnesium fluoride, Infrared radiation, Silver

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Green plants are commonly found in typical combat circumstances, so it is of important practical significance to make targets hidden in green plants. Green plants have special spectral characteristics in the visible and near-infrared bands, which makes the above purpose of stealth difficult to achieve. Meanwhile, to counter multi-band detection, the stealthy performance of targets in the infrared bands and at the laser wavelength needs to be considered. In this paper, a new structure of the green film is designed, based on the characteristic matrix method, which can achieve compatible stealth of the visible, near-infrared, middle, and far infrared as well as 1.06 μm laser. The film consists of the dielectric/metal/dielectric (D/M/D) structure combined with additional four dielectric layers, which has fewer total layers than the previous structure and can improve the preparation efficiency. In the visible and near-infrared bands, the film possesses suitable chromaticity coordinates and spectral characteristics similar to those of green plants. In the middle and far infrared bands, the film exhibits high reflectivity of 0.857 and 0.924, respectively; at 1.06 μm wavelength, the film shows low reflectivity of 0.107. Exploring the effect of different angles on the spectra, the results prove that the structure has good angular stability. In summary, the designed film achieves multi-band compatible stealth in green circumstance.

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