Provided are a polarizing plate having excellent optical characteristics, and a method for manufacturing the polarizing plate. The present invention is provided with: a translucent substrate through which light passes in a working band; a bundle structure layer constituted of a columnar sheaf comprising one or more material from among dielectrics, metals, and semiconductors, the bundle structure layer being formed on the translucent substrate; an absorption layer formed on the bundle structure layer; a dielectric layer formed on the absorption layer; and a reflection layer formed on the dielectric layer and arranged as a one-dimensional lattice at a pitch that is smaller than the wavelength of the light in the working band. Because the bundle structure layer increases light absorption and light scattering, the result is that reflectivity can be reduced and excellent optical characteristics obtained.

A wire grid polarizer (WGP) can include an array of support-ribs on a substrate. Sides of the support-ribs can be inclined to one side. A wire can be applied on an upper-side and distal end of each support-rib, each wire being separate from wires on adjacent support-ribs. The WGP can be made with reduced or no etching.

An optical device according to at least one embodiment of the present disclosure includes a projector configured to project scanning light that is light in a predetermined polarized state. The projector included in the optical device includes an optical member configured to selectively reflect the light in the predetermined polarized state.

An optical device includes a light source and a polarization selective optical element. The polarization selective optical element includes a stack of a plurality of cholesteric liquid crystal layers. The plurality of cholesteric liquid crystal layers includes a first cholesteric liquid crystal layer with liquid crystal molecules arranged in a first helical configuration having a first pitch range for light of a first wavelength range and a second cholesteric liquid crystal layer with liquid crystal molecules arranged in a second helical configuration having a second pitch range for light of a second wavelength range. The second wavelength range is different from the first wavelength range.

A polarizing beam splitter according to the present disclosure includes a transparent optical member, at least one first polarizing beam splitting film, and at least one second polarizing beam splitting film. The at least one first polarizing beam splitting film is disposed inside the transparent optical member to be tilted at a first tilt angle with respect to a first axis. The first axis is parallel to entering light. The at least one second polarizing beam splitting film is disposed inside the transparent optical member to be tilted at a second tilt angle with respect to the first axis. The second tilt angle is in a direction opposite to that of the first tilt angle.

Provided is a polarization spectral filter, including: a first reflector and a second reflector disposed to face each other in a first direction; and a grating layer disposed between the first reflector and the second reflector. The grating layer includes a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged in a second direction perpendicular to the first direction. The plurality of first grating elements include a first dielectric material having a first refractive index. The plurality of second grating elements include a second dielectric material having a second refractive index different from the first refractive index.

A wire grid polarizer (WGP) can include an array of support-ribs on a substrate. Sides of the support-ribs can be inclined to one side. A wire can be applied on an upper-side and distal end of each support-rib, each wire being separate from wires on adjacent support-ribs. The WGP can be made with reduced or no etching.

An optical film includes a polarizing layer including a polymer dyed with iodine, a phase-retardation layer disposed under the polarizing layer, and an inorganic barrier layer including a non-polar inorganic material. The inorganic barrier layer is disposed on at least a surface of the polarizing layer, has a water vapor transmission rate (WVTR) equal to or less than about 100 g/day.Math.m.sup.2, and has a thickness equal to or less than about 5 μm. A display device comprising the optical film is also provided.

The present invention relates to an optical body and a display device including the same, and more specifically, the present invention relates to an optical body, which can minimize optical loss thereof and maximize luminance enhancement thereof, and a display device including the same.

Provided is a transparent substrate, a plurality of protrusions protruding from the first surface of the transparent substrate; and an antireflection film laminated on the second surface opposite to the first surface of the transparent substrate, wherein the plurality of protrusions are periodically arranged at a pitch shorter than a wavelength of light in a use band, each of the protrusions extends in in a first direction and includes a reflective layer, a dielectric layer, and an absorption layer in order from the first direction, the antireflection film has high refractive index layers and low refractive index layers that are alternately laminated, and the antireflection film is an ion beam assisted vapor deposition film or an ion beam sputtering film.