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PI Physik Instrumente - Revolution In Photonics Align LW LB 3/24

Stealth Sheet Conceals Hot Objects from IR

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An ultrathin cloaking material has been developed that can hide hot objects, such as human bodies and military vehicles, from IR cameras. The new “stealth sheet” is <1 m thick and absorbs approximately 94 percent of the IR light it encounters, making hot objects beneath the cloaking material almost completely invisible to IR detectors. To make the stealth material capable of absorbing light in the MIR and LWIR range — the wavelengths emitted by objects that are the approximate temperature of a human body — researchers from the University of Wisconsin-Madison...Read full article

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    Published: June 2018
    Glossary
    thermal imaging
    The process of producing a visible two-dimensional image of a scene that is dependent on differences in thermal or infrared radiation from the scene reaching the aperture of the imaging device.
    infrared
    Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but shorter than those of microwaves. The infrared spectrum spans wavelengths roughly between 700 nanometers (nm) and 1 millimeter (mm). It is divided into three main subcategories: Near-infrared (NIR): Wavelengths from approximately 700 nm to 1.4 micrometers (µm). Near-infrared light is often used in telecommunications, as well as in various imaging and sensing...
    broadband
    Indicating a capability to deal with a relatively wide spectral bandwidth.
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    Research & TechnologyeducationAmericasImagingLight SourcesMaterialsSensors & Detectorscamerasinfrared camerasthermal imagingdefenseindustrialinfraredbroadbandnanonanostructuresilicon nanowiressilver nanoparticlesblack siliconsilicon photonicsTech Pulse

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