An apparatus comprising a first substrate comprising a nanostructured surface, thereby forming an optical metasurface; a mirror formed on a second substrate; and a mechanism arranged to move the first and second substrates relative to one another. The mechanism alters a separation between the first and second substrates between a first separation distance and at least a second separation distance. At the first separation distance the optical metasurface performs a first manipulation of incident light and at the second separation distance the optical metasurface does not perform the first manipulation of incident light. An optical system and a method are also described.

A multiple-lens optical fingerprint reader for reading fingerprints through a display has a spacer; and multiple microlenses with concave and convex surfaces in a microlens array, each microlens of multiple lenses focuses light arriving at that microlens from a finger adjacent the display through the spacer forms an image on associated photosensors on a photosensor array of an image sensor integrated circuit. A method of verifying identity of a user includes illuminating a finger of the user with an OLED display; focusing light from the finger through arrayed microlenses onto a photosensor array, reading the array into overlapping electronic fingerprint images; extracting features from the overlapping fingerprint images or from a stitched fingerprint image, and comparing the features to features of at least one user in a library of features and associated with one or more fingers of one or more authorized users.

A foldable circular polarizing plate includes a polarizer and a foldable compensation film disposed on one surface of the polarizer, wherein in-plane retardations of the liquid crystal layer at 450 nm, 550 nm, and 650 nm wavelengths satisfy Relationship Equations 1 or 2, the compensation film is configured to absorb light in a wavelength region of less than or equal to 420 nm, and a reflection color in a CIE-Lab color coordinate system satisfies Δa*b*≤5.0 and a foldable organic light emitting diode display including the same.
R.sub.e(450 nm)<R.sub.e(550 nm)≤R.sub.e(650 nm)  [Relationship Equation 1]
R.sub.e(450 nm)≤R.sub.e(550 nm)<R.sub.e(650 nm)  [Relationship Equation 2]

A high-speed device, for inspecting a large area of an object, which includes: a terahertz wave generation portion configured to generate a terahertz wave; a ring beam forming portion configured to form a ring beam by using the terahertz wave incident from the terahertz wave generation portion; a rotary mirror configured to reflect the ring beam formed by the ring beam forming portion while rotating to allow the ring beam to be incident on an inspection target object; and a detector configured to detect a ring beam generated from the inspection target object.

A wavelength-tunable interference filter includes: a first substrate where a first mirror and a first electrode are provided; a second substrate where a second mirror corresponding to the first mirror and a second electrode facing the first electrode are provided; and a bonding part bonding the first substrate and the second substrate together. The first substrate includes a moving part where the first mirror is arranged, a diaphragm part holding the moving part in such a way that the moving part is movable in the Z-direction, and an outer circumferential part provided outside of the diaphragm part. The diaphragm part includes a planar part having a uniform thickness, and a first slope part having a thickness in the Z-direction incrementing as it goes from the planar part toward the outer circumferential part. The first electrode is provided over a range from the planar part to the first slope part. An outer edge of the first electrode, which is an edge opposite to the first mirror, is located at the first slope part. The bonding part is provided over a range from a part of the first slope part to the outer circumferential part.

An active metasurface includes a number of periodically-repeated unit cells arranged on a substrate that each include a plasmonic waveguide shaped and sized to provide a cutoff mode that captures light of a target wavelength. The active metasurface includes an index modulation controller that controllably varies a voltage differential across each one of the periodically-repeated cells to change a phase of light incident on the metasurface.

An optical member includes a base material containing aluminum or aluminum alloy, a first layer including black porous aluminum oxide provided on the base material, and a second layer including aluminum oxide having a plurality of projection portions provided on the first layer.

Nanoassembly methods for producing quasi-3D plasmonic films with periodic nanoarrays of nano-sized surface features. A sacrificial layer is deposited on a surface of a donor substrate having periodic nanoarrays of nanopattern features formed thereon. A plasmon film is deposited onto the sacrificial layer and a dielectric spacer is deposited on the plasmon film. The donor substrate having the sacrificial layer, plasmon film, and dielectric spacer thereon is immersed in a bath of etchant to selectively remove the sacrificial layer such that the plasmon film and the dielectric spacer thereon adhere to the surface of the donor substrate. The dielectric spacer and the plasmon film are mechanically separated from the donor substrate to define a quasi-three dimensional (3D) plasmonic film having periodic nanoarrays of nano-sized surface features defined by the nanopattern features of the donor substrate surface. The quasi-3D plasmonic film is then applied to a receiver substrate.

Provided is an optical film capable of neutralizing both the tint as viewed in a transmittance central axis direction and the tint as viewed in a direction inclined from a transmittance central axis, and an optical laminate and an image display device formed of this optical film. The optical film includes a light absorption anisotropic layer in which an angle θ between a transmittance central axis and a normal direction of a layer surface is in a range of 0° to 45°, and a tint adjusting layer containing at least one organic coloring agent compound

An object of the present invention is to provide an antibacterial film having an antiglare function and excellent image visibility, a touch panel, and a manufacturing method for an antibacterial film.

An antibacterial film of the present invention contains a base material and at least one antibacterial layer disposed on the base material, in which the antibacterial layer contains a binder, a light diffusing particle, and an antibacterial agent particle and satisfies a specific condition 1.