The present invention relates to display systems that use materials made from various arrangements of lenses and other optical materials. Careful design and use of these materials can be used to achieve display systems with many desirable visual effects having applicability in image and video displays, virtual reality, immersive environments, as well as in architecture, art, entertainment, and interactive systems.

An electromagnetic-wave absorber having a body of porous material, including a first surface for receiving electromagnetic waves is described. Starting from the first surface, a first layer for scattering the electromagnetic waves includes pores which are coated with electrically conductive material. The electromagnetic-wave absorber also includes a second layer positioned after the first layer which is substantially transparent to the electromagnetic waves.

A camouflage pattern is provided that appears to have infinite focus and depth of field even at 100 percent size for the elements in the camouflage pattern. Generally, three-dimensional (3D) models of elements to be used in the camouflage pattern are captured or generated. The models are then arranged in a scene with a background (e.g., an infinite background) via 3D graphics editing programs such as is used to render computer generated graphics in video games and movies. A two-dimensional (2D) capture of the scene thus shows all visible surfaces of the elements in the scene in focus at all depths of field. The elements may or may not be shaded by one another from the perspective of the image capture location in the 3D environment.

A camouflage pattern is provided that appears to have infinite focus and depth of field even at 100 percent size for the elements in the camouflage pattern. Generally, three-dimensional (3D) models of elements to be used in the camouflage pattern are captured or generated. The models are then arranged in a scene with a background (e.g., an infinite background) via 3D graphics editing programs such as is used to render computer generated graphics in video games and movies. A two-dimensional (2D) capture of the scene thus shows all visible surfaces of the elements in the scene in focus at all depths of field. The elements may or may not be shaded by one another from the perspective of the image capture location in the 3D environment.

A radar-absorbing fiber-reinforced structure includes a fiber composite discharging part. The fiber composite discharging part includes a first electrode part and a second electrode part, which are spaced apart from each other by a dielectric layer and receive different voltages. The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure to reduce reflectivity of the radar. At least one of the first electrode part and the second electrode part include a conductive fiber having a tensile strength equal to or more than 0.5 GPa.

A radar-absorbing fiber-reinforced structure includes a fiber composite discharging part. The fiber composite discharging part includes a first electrode part and a second electrode part, which are spaced apart from each other by a dielectric layer and receive different voltages. The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure to reduce reflectivity of the radar. At least one of the first electrode part and the second electrode part include a conductive fiber having a tensile strength equal to or more than 0.5 GPa.

A radar-absorbing fiber-reinforced structure includes a fiber composite discharging part. The fiber composite discharging part includes a first electrode part and a second electrode part, which are spaced apart from each other by a dielectric layer and receive different voltages. The fiber composite discharging part is configured to discharge plasma in response to a voltage difference thereby changing a reflected wave or transmitted wave of a radar incident on the radar-absorbing fiber-reinforced structure to reduce reflectivity of the radar. At least one of the first electrode part and the second electrode part include a conductive fiber having a tensile strength equal to or more than 0.5 GPa.

Disclosed is a stealth device that has a double-band stealth function against millimeter-wavelength electromagnetic waves, has high absorption at a near-infrared laser wavelength, and has low emissivity of mid-infrared light and long-infrared light. The stealth device includes a wavelength-selective absorption pattern layer made of a material having electrical conductivity, wherein the wavelength-selective absorption pattern layer is composed of conductive thin-film patterns capable of causing plasmonic resonance at a first wavelength and a second wavelength different from the first wavelength; and a dielectric layer disposed below the wavelength-selective absorption pattern layer and made of a dielectric material.

Disclosed is a multi-spectral stealth device that generates a camouflage color in a visible ray region, has low reflectivity in near-infrared ray and short-wavelength infrared-ray regions, and has low emissivity in mid-wavelength and long-wavelength infrared-ray regions. The multi-spectral stealth device includes a metal layer made of a first metal having electrical conductivity; a semiconductor layer disposed on a top surface of the metal layer and made of a semiconductor material having a bandgap in which the semiconductor material is capable of absorbing a visible ray and a near-infrared ray; and a plurality of metal patterns regularly arranged on a top surface of the semiconductor layer and made of a second metal having electrical conductivity.

The present invention provides an arrow shaft including a carbon fiber sheet having a transfer layer formed thereon, wherein the carbon fiber sheet is formed to extend in one direction and includes a plurality of carbon fiber layers in which a camouflage layer is formed on at least a part of an outermost layer thereof, and at least one transfer layer is formed on one surface of at least one of the carbon fiber layer and the camouflage layer.