An optically anisotropic film exhibiting reverse wavelength dispersibility and an Nz factor of about 0.50 (0.40 to 0.60), is formed of a lyotropic liquid crystalline composition containing colorable rod-like and plate-like compounds, where a measurement to obtain an ultraviolet-visible absorption spectrum by applying linearly polarized light is carried out by changing light direction and assuming that an absorbance at a maximum absorption wavelength in a wavelength range of 230 to 400 nm of the rod-like compound is highest at a first direction, and of the plate-like compound is highest at a second direction, the first direction and the second direction are orthogonal to each other, the maximum absorption wavelength in a wavelength range of 230 to 400 nm of the rod-like compound is smaller than that of the plate-like compound, and Nz.sup.P represented by Expression (N) Nz.sup.P = (nx.sup.P - nz.sup.P)/(nx.sup.P - ny.sup.P) of the plate-like compound is negative.

Provided is a circularly polarizing plate and a display device that includes the circularly polarizing plate. The circularly polarizing plate can be applied to a display device such as an organic light emitting display device to minimize blocking of light in the visible light region affecting image quality while blocking harmful ultraviolet rays appropriately and also has excellent durability.

The present invention relates to a method for manufacturing an optical element including a layer comprising anisotropic optical function and alignment capability. The layer is formed from a composition comprising polymerizable liquid crystals and one or more photo-orientable substances. Alignment on top of the layer is achieved by exposure to linearly polarized light.

A polarizing film, a method of preparing the polarizing film, and a display device including the polarizing film in which the polarizing film includes a self-aligned polymer matrix; liquid crystals aligned and cured in one direction in accordance with an alignment direction of the polymer matrix; and a dichroic dye aligned in the alignment direction of the liquid crystals.

Provided is an optical laminate including an optically anisotropic layer having at least two regions having different visibility correction transmittances, in which the visibility correction transmittance in a region having a high transmittance is further improved. An optical laminate including: at least a first region and a second region having different values of visibility correction transmittance; and a protective layer having a thickness of 5 μm or less, an orientation layer, and a light absorption anisotropic layer provided in this order, wherein the second region is a region in which the visibility correction transmittance is higher than that of the first region, and the light absorption anisotropic layer is a layer including a liquid crystal composition containing a dichroic dye, and includes the first region and the second region.

The present disclosure relates to a waveplate having a substrate forming an optic. The substrate may have an integral portion forming a plurality of angled columnar features on an exposed surface thereof. The plurality of angled columnar features may further be aligned parallel with a directional plane formed non-parallel to a reference plane, with the reference plane being normal to a surface of the substrate. The metasurface forms a birefringent metasurface.

A polarizing film includes: a polarizing layer; a coating layer at one side of the polarizing layer and to absorb wavelengths in an ultraviolet ray region; and a phase retardation layer at another side of the polarizing layer, wherein the coating layer has a thickness of about 15 nm to about 5 μm.

An extreme ultraviolet light generation apparatus may include a target supply unit supplying a target to a plasma generation region in a chamber, a laser system emitting first laser light having a polarization direction deflected in one direction and second laser light to generate a secondary target that is the target diffused by irradiating the target with the first laser light from a direction perpendicular to a travel axis of the target and to generate extreme ultraviolet light by irradiating the secondary target with the second laser light, a polarization direction adjustment unit arranged on an optical path of the first laser light and configured to adjust the polarization direction of the first laser light, a secondary target observation unit configured to observe a distribution of the secondary target, and a processor controlling the polarization direction adjustment unit based on an observation result of the secondary target observation unit.

High-performance optical-metasurface-based platform configured with the use of Tantalum Pentoxide to operate with extremely low levels of loss at frequencies of UV light and, in particular, in mid- and near-UV ranges and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). Process of fabrication of such metasurface producing near-zero levels of optical loss and employing the otherwise standard etching methodologies. Embodiments facilitate the development of low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

Provided are an optical film, a polarizing plate including same, and a display device including same, the optical film comprising a first layer and second and third layers sequentially formed on the first layer, wherein the first layer and the third layer are each formed directly on the second layer, the first layer is a reverse wavelength dispersive negative A layer, the third layer is a positive C layer, and the ratio of the thickness of the second layer to the thickness of the third layer (the thickness of the second layer/the thickness of the third layer) is about 0.2 to about 2.