An approach to seeker windows for aircraft comprises a window layer comprising an IR transparent material, the window layer comprising a first side and a second side substantially opposite the first side; and a heating layer on the first side or the second side of the window layer, the heating layer configured to apply a heating profile to the window layer to reduce thermal shock imparted to the window layer when the seeker window is exposed to hypersonic flight conditions.

A colored visibly opaque, highly efficient NIR-transmitting optical filter displaying angle insensitivity is based on one-dimensional photonic crystals. The filter comprises a photonic crystal stack comprising at least one high refractive index layer and two low refractive index layers respectively disposed along a first side and a second side of the high refractive index layer. The photonic crystal stack may have 10 or fewer layers. The filter transmits a first portion of an electromagnetic spectrum having a first range of predetermined wavelengths in an infrared light range or near infrared light range, while reflecting a second portion of the electromagnetic spectrum having a second range of predetermined wavelengths in a visible light range to generate a reflected output. In certain aspects, a refractive index contrast between the at least one high refractive index layer and at least one of the two low refractive index layers is ≥ about 40%.

An example electronic device includes a transparent cover; and a flexible display coupled to the cover. The cover may include a first layer including glass; a second layer positioned between the first layer and the flexible display; and a third layer positioned between the first layer and the second layer. The third layer includes a pattern overlapping a folding part of the flexible display and including a plurality of grooves formed in a bonding surface with the second layer, and has a hardness greater than that of the second layer.

A polymer bilayer includes a layer of a porous fluoropolymer directly overlying a layer of polyethylene. The polyethylene layer may be porous or dense and may include an ultra-high molecular weight polymer. The polymer bilayer may be co-integrated with structures (e.g., wearable devices) exposed to high thermal loads (>0-1000 W/m.sup.2) and provide passive cooling thereof. For instance, passive cooling of AR/VR glasses under different solar loads may be achieved by a polymer bilayer that is both highly reflective across solar heating wavelengths and highly emissive in the long-wavelength infrared. The high reflectance decreases energy absorption across the solar spectrum while the high emissivity promotes radiative heat transfer to the surroundings.

A structure that forms a visual representation may include a first outer layer, a second outer layer, and an interlayer being disposed between the first outer layer and the second outer layer. The interlayer may have a first side adjacent to the first outer layer and a second side adjacent to the second outer layer. The interlayer includes a plurality of cuts extending from the first side of the interlayer towards the second side of the interlayer. Each of the plurality of cuts may have an angle with respect to a plane formed by a surface of the first side of the interlayer. Each angle for at least a portion of the plurality of cuts is based on one or more pixel values of at least one image that forms the basis of the visual representation.

This disclosure generally relates to retroreflective articles and methods of making such articles.

A transfer film has a temporary support, a first curable transparent resin layer, a second curable transparent resin layer in which the thickness of the first curable transparent resin layer is equal to or greater than 1 μm, the second curable transparent resin layer includes 5% by mass to 95% by mass of a metal oxide particle with respect to the solid content of the second curable transparent resin layer, and the first curable transparent resin layer does not include the metal oxide particle, or includes less amount of the metal oxide particle than the second curable transparent resin layer.

A polarizing plater includes a polarizer, a protective film disposed on at least one surface of the polarizer, and a diffusing adhesive layer and a transparent adhesive layer interposed between the polarizer and the protective film. The diffusing adhesive layer includes a diffusing particle. The diffusing particle includes a first diffusing particle and a second diffusing particle which have different average diameters from each other.

An antireflection film substrate that is provided on a surface of a substrate includes a surface layer having an alumina hydrate as a main component. The surface layer has an uneven structure in which a volume proportion of the alumina hydrate per unit volume decreases in a direction from the substrate side to a surface side, and a period of apexes distributed on the uneven structure on the surface side is configured to be equal to or less than a wavelength of light of which reflection is to be suppressed.

A polyester-based film comprising at least one layer permitting printing as a result of laser irradiation; wherein not less than 100 ppm but not greater than 3000 ppm of laser-printable metal is present in all layers of the film. The film is capable of being printed in distinct fashion by a laser, excels with respect to unevenness in thickness, and is of high transparency, while at the same time provide packaging which employs such film and on which printing has been directly carried out.