An optical reflection film provided with an optical interference film formed by alternately laminating high refractive index and low refractive index layers with a refractive index difference therebetween on a substrate, wherein when among the high refractive index and low refractive index layers constituting the optical interference film, a layer disposed closest to the substrate is defined as a lowest layer, a layer farthest from the substrate is defined as a highest layer, and each layer disposed between the lowest layer and the highest layer is defined as an intermediate layer, the average modulus of elasticity of the intermediate layer measured by a nano-indentation method is higher than the modulus of elasticity of the highest layer by 2 GPa or more, and the thickness of the highest layer is 1.2-7 times the average thickness of the intermediate layer.

A multilayer optical film has a packet of microlayers that selectively reflect light by constructive or destructive interference to provide a first reflective characteristic. At least some of the microlayers are birefringent. A stabilizing layer attaches to and covers the microlayer packet proximate an outer exposed surface of the film. Heating element(s) can physically contact the film to deliver heat to the packet through the stabilizing layer by thermal conduction, at altered region(s) of the film, such that the first reflective characteristic changes to an altered reflective characteristic in the altered region(s) to pattern the film. The stabilizing layer provides sufficient heat conduction to allow heat from the heating elements to change (e.g. reduce) the birefringence of the birefringent microlayers disposed near the outer exposed surface in the altered region(s), while providing sufficient mechanical support to avoid substantial layer distortion of the microlayers near the outer exposed surface in the altered region(s).

Disclosed is a film composed of a resin having a thiourethane bond, wherein the molar ratio (S/N) of sulfur to nitrogen contained in the resin is equal to or more than 0.8 and less than 3. A method for manufacturing a film is also disclosed. The disclosed film is excellent in a balance among high refractive index, low birefringence and light transmittance, and further excellent in a balance of mechanical characteristics such as toughness, hardness and dimensional stability, so that effects of deformation and the like during processing are very small, and the film is further excellent in solvent resistance as well.

Reflectin proteins are proteins derived from cephalopods (certain species of squid) which have unusual optical properties. Disclosed herein are thin films of reflectin proteins which can be tuned to reflect infrared light. Advantageously, the films can be tuned dynamically over short time scales, to reflect at different wavelengths. Disclosed herein are novel infrared-reflective coatings, methods of making such coatings, and infrared-reflective objects such as textiles, building materials, and camouflage materials.

Low loss, high reflectivity wide band mirror films provide a desired mix of specular reflection and diffuse reflection or scattering to provide semi-specular reflectivity. The mirror films generally include both a specularly reflective multilayer optical film (MOF) having a wide reflection band, and a scattering layer. In some cases a low refractive index TIR layer is sandwiched between the MOF and the scattering layer. In other cases the scattering layer contacts the MOF directly. In embodiments that include the TIR layer, the TIR layer preferably has a nanovoided morphology and includes a plurality of particles and a polymer binder. In embodiments wherein the scattering layer contacts the MOF directly, the scattering layer preferably also has a nanovoided morphology and includes a plurality of particles and a polymer binder.

A flexible Bragg reflector includes a substrate and at least one dyad layer located on the substrate. The at least one dyad layer includes a layer of polymeric material and a layer of inorganic material. The layer of polymeric material has a low refractive index, the layer of inorganic material has a higher refractive index than that of the layer of polymeric material, and the substrate and the at least one dyad layer are flexible. Methods for making a flexible Bragg reflector are also described.

A cholesteric resin layered body including a substrate, an intermediate layer, and a cholesteric resin layer in this order, wherein a difference in a reflection band center wavelength of the cholesteric resin layer before and after the layered body is heated at 130 C. for 8 hours is 50 nm or less, method for producing the same, as well as a reflective material, a display medium and a decorating material including the same.

The present invention provides a mirror plate capable of suppressing the occurrence of orange peel-like unevenness. The mirror plate includes a mirror film including a mirror layer and an adhesive layer; and a substrate. The adhesive layer is attached to one surface of the substrate. The one surface of the substrate has an arithmetic average roughness of less than 0.03 m. The mirror film includes no hard coat layer containing cured resin. The thicknesses of the mirror layer and the adhesive layer have a relation satisfying: tA/tM0.18, where tM represents the thickness of the mirror layer and to represents the thickness of the adhesive layer.

Reflectin proteins are proteins derived from cephalopods (certain species of squid) which have unusual optical properties. Disclosed herein are thin films of reflectin proteins which can be tuned to reflect infrared light. Advantageously, the films can be tuned dynamically over short time scales, to reflect at different wavelengths. Disclosed herein are novel infrared-reflective coatings, methods of making such coatings, and infrared-reflective objects such as textiles, building materials, and camouflage materials.

A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.