Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.

Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.

A privacy mesh configured for effectively creating a one-way privacy screen in an opening of a space, along with associated methods of use and manufacture, are disclosed. In at least one embodiment, the privacy mesh provides an interior surface and an opposing exterior surface. The interior surface provides an interior visual design configured to minimize any visual obstruction created by the privacy mesh when looking through the interior surface of the privacy mesh from within the space. The exterior surface provides an exterior visual design configured to visually obscure an interior of the space when looking through the exterior surface of the privacy mesh from outside of the space. In use, the privacy mesh is positionable in, between, or in front of the opening such that the exterior surface of the privacy mesh is spaced apart from the opening, with the interior surface facing the space and the opposing exterior surface facing outwardly away from the space toward an exterior of the space.

The invention comprises of a UAV designed to limit visually contrast and audibility in flight for covert surveillance operations, a method of configuring the UAVs structure to further reduce its visual signature to take account for the atmospheric and terrestrial environment it will operate in and a method of conducting a covert surveillance operation to actively minimise the UAVs visual & auditory signature from the viewpoint of an individual under surveillance. Both passive and active illumination are used to reduce the visual signature of the UAV. The UAV is actively camouflaged using lighting techniques that utilises the limitations of the human visual system and the optical effects of light interacting with the terrain, atmosphere and aircraft. The visual camouflage is directional. The audible signature of the UAV is reduced through the design of the propulsion system and the mode in which the UAV is operated.

Energy distribution structures provide architectural flexibility in various configurations, materials, and scalability, which enables a vast number of applications. An energy distribution structure or array thereof may include a three-dimensional outer component and a three-dimensional inner component within the outer component. The outer component absorbs and redirects initial energy from an applied energy event, and the inner component absorbs and redirects residual energy from the applied energy event. Such an applied energy event may be caused by a ballistic or non-ballistic impact, an instantaneous or prolonged impact such as atmospheric pressure or decompression, explosive overpressure (shockwave), low-velocity contact, and blunt force trauma. Energy distribution structures can increase the strength, resilience or survivability of such events, and reduce the injury or damage to target objects such as people, vehicles, structures, vessels and surfaces by shielding same from such events.

A system for providing stealthy vision, includes a source element providing electromagnetic radiation at a predetermined wavelength to illuminate a target; and a camera imaging the target to be illuminated; wherein the source element provides electromagnetic radiation including shortwave infrared light; and wherein the predetermined wavelength includes a wavelength in the near infrared spectrum wherein the absorption features of an atom or a molecule present in the medium where the electromagnetic radiation propagates form a continuum, that is a wavelength region wherein two or more narrow absorption lines are close enough to each other that they effectively form a single absorption area with a width greater than that of a single absorption line so that the range of the electromagnetic radiation in the medium is limited for all wavelengths within the continuum; wherein the region corresponds to a wavelength range centered at about 1382.8 nm, 1388.1 nm or 1392.4 nm.

Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.

Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.

A metalized textile containing a textile, a first metalized layer at least partially covering a first side of the textile, and a second metalized layer at least partially covering the first metalized layer. The first metalized layer covers at least a portion of the surfaces of the plurality of yarns of the textile, where the first metalized layer contains a metal. The second metalized layer is adjacent to the first metalized layer at least partially covering the first metalized layer and contains a plurality of metallic particles, binder, and a pigment. The second metalized layer comprises a pattern of at least 2 colors, where at least one of the colors contains a plurality of metallic particles and a pigment. At least two colors have a difference in reflectivity of at least 20% in each of the following regions: 1 μm, 2 μm, average over 3-5 μm, and average over 8-12 μm.

A metalized textile containing a textile, a first metalized layer at least partially covering a first side of the textile, and a second metalized layer at least partially covering the first metalized layer. The first metalized layer covers at least a portion of the surfaces of the plurality of yarns of the textile, where the first metalized layer contains a metal. The second metalized layer is adjacent to the first metalized layer at least partially covering the first metalized layer and contains a plurality of metallic particles, binder, and a pigment. The second metalized layer comprises a pattern of at least 2 colors, where at least one of the colors contains a plurality of metallic particles and a pigment. At least two colors have a difference in reflectivity of at least 20% in each of the following regions: 1 μm, 2 μm, average over 3-5 μm, and average over 8-12 μm.