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Hierarchical visible-infrared-microwave scattering surfaces for multispectral camouflage
Yun Huang1, Yining Zhu1, Bing Qin1
1State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310024, China.
Nanophotonics (Berlin, Germany)
|December 5, 2024
Summary
This study introduces advanced multispectral camouflage using hierarchical scattering surfaces. The new technology offers low infrared emissivity and high microwave scattering for enhanced safety and stealth.
Area of Science:
- Materials Science
- Physics
- Engineering
Background:
- Multispectral camouflage is crucial for protecting assets across infrared and microwave spectra.
- Current methods relying on high infrared reflection and microwave absorption have limitations, including target exposure and increased thermal signatures.
Purpose of the Study:
- To develop a novel multispectral camouflage scheme addressing limitations of existing technologies.
- To create a device with low infrared emissivity, low infrared specular reflectivity, and high microwave scattering.
Main Methods:
- Design and fabrication of hierarchical visible-infrared-microwave scattering surfaces.
- Characterization of infrared emissivity and reflectivity in the 8-14 μm range.
- Measurement of microwave scattering properties, including radar cross-section reduction.
Main Results:
- Achieved low infrared emissivity (ε = 0.17) and specular reflectivity (R = 0.13).
- Demonstrated high microwave scattering with an 8-13 GHz bandwidth for -10 dB radar cross-section reduction.
- Enabled tunable color for visible spectrum camouflage.
Conclusions:
- The proposed hierarchical scattering surfaces offer a new paradigm for multispectral camouflage.
- This technology simultaneously reduces infrared detection and microwave visibility while managing heat generation.
