Phys.org February 7, 2024
Achieving effective camouflage and thermal management across the entire infrared spectrum, especially the short-wave infrared (SWIR) band, remains challenging. Researchers in China proposed a multilayer wavelength-selective emitter that achieves effective camouflage across the entire infrared spectrum, including the near-infrared (NIR), SWIR, mid-wave infrared (MWIR), and long-wave infrared (LWIR) bands, as well as the visible (VIS) band. The emitter would enable radiative heat dissipation in two non-atmospheric windows. The emitter’s properties were characterized by low emittance in the SWIR/MWIR/LWIR bands, and low reflectance in the VIS/NIR bands. The high emittance in the two non-atmospheric windows would ensure efficient radiative heat dissipation, which results in a temperature decrement compared to the Cr reference at 2000 W m−2 input power density. According to the researchers their work highlights the role of solar radiance in camouflage, and provides a comprehensive guideline for developing multiband camouflage compatible with radiative heat dissipation, from the visible to LWIR… read more. Open Access TECHNICAL ARTICLE
Principle for whole-infrared-band and visible-band camouflage… Credit: Light: Science & Applications volume 12, Article number: 246 (2023)