Abstract: Provided is a fine concave-convex laminate that is reduced in thickness, has excellent antireflection performance, and can suppress scattering and absorption of short-wavelength light. A fine concave-convex laminate comprises a substrate, a first transparent organic layer, and a second transparent organic layer laminated in the stated order, wherein the first transparent organic layer has a fine concave-convex structure at a surface facing the second transparent organic layer, the second transparent organic layer has fine concave-convex structures at both surfaces, and a thickness of a composite layer composed of the first transparent organic layer and the second transparent organic layer is 15 ?m or less.

Abstract: There is provided an optical body including: a base material; and a light extraction unit that is formed on a surface of the base material and that extracts, to an outside of the base material, internally propagating light that is injected in an inside of the base material from a side surface of the base material. The light extraction unit is formed of a convex microlens array, and a maximum inclination angle of the convex microlens array substantially coincides with a maximum propagation angle of the internally propagating light.

Abstract: There is provided a diffuser plate, a display device, a projection device, and a lighting device that can achieve flat diffusion angle distribution characteristics while reducing a high-order diffraction component, the diffuser plate including: a single lens group positioned on a surface of a transparent substrate, in which curvature radii of respective single lenses composing the single lens group are varied as a whole, and peak positions of the respective single lenses are located irregularly, and a lens surface shape of at least one of the single lenses in the single lens group satisfies Equation 1 and Equation 2.

Abstract: There is provided a microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The microlens group at least corresponding to a light ray entering part in the microlens array diffuser plate includes two or more unit cells that are continuous in an array sequence, and the unit cells include a plurality of microlenses positioned on the surface of the transparent substrate.

Abstract: An inorganic polarizing plate, containing: substrate transparent to light of bandwidth for use; and wire grid layer containing metal wires aligned on the substrate with gaps shorter than wavelength of the light, the plate satisfying formulae (1) to (3): 0 nm<(DR?DL)??Formula (1); 0 nm<|GR?GL|??Formula (2); and 0.90?SR/SL?1.30??Formula (3), where DL is distance along thickness direction of the substrate in region RL between one metal wire W and metal wire WL next to W in the wire grid layer, and DR is distance along the thickness direction of the substrate in region RR between W and metal wire WR provided next to W and at opposite side to side where WL is provided; GL is gap between W and WL, and GR is gap between W and WR; and SL is ratio of DL to GL, and SR is ratio of DR to GR.

Abstract: There is provided an optical body including: a base material; a second optical layer, formed on at least one surface of the base material, that reduces a reflection of extraneous light; and a first optical layer, laminated on top of a part of the second optical layer, that extracts internally propagating light incident inside the base material from a side face of the base material to an outside of the base material. On a surface of the first optical layer, a first concave-convex structure that reflects the internally propagating light is formed.

Abstract: There is provided an optical body including: a base material; and a light extraction unit that is formed on a surface of the base material and that extracts, to an outside of the base material, internally propagating light that is injected in an inside of the base material from a side surface of the base material. The light extraction unit is formed of a convex microlens array, and a maximum inclination angle of the convex microlens array substantially coincides with a maximum propagation angle of the internally propagating light.

Abstract: There is provided a method to manufacture a diffuser plate with better productivity and exhibiting an excellent diffusion property and having excellent durability with respect to light having large coherence, the microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The diffuser plate includes two or more unit cells that are continuously set in array, the unit cell includes a plurality of microlenses positioned on the surface of the transparent substrate, and ridge lines between the microlenses adjacent to each other are nonparallel to each other, and are nonparallel to the transparent substrate.

Abstract: There is provided a diffuser plate, a display device, a projection device, and a lighting device that can achieve flat diffusion angle distribution characteristics while reducing a high-order diffraction component, the diffuser plate including: a single lens group positioned on a surface of a transparent substrate, in which curvature radii of respective single lenses composing the single lens group are varied as a whole, and peak positions of the respective single lenses are located irregularly, and a lens surface shape of at least one of the single lenses in the single lens group satisfies Equation 1 and Equation 2.

Abstract: The present application provides a retardation element, having a first birefringent layer; and a second birefringent layer which has approximately the same average thickness as that of the first birefringent layer and contacts the first birefringent layer such that an angle formed between a first line segment representing the principal axis of refractive index anisotropy of the first birefringent layer and a second line segment representing the principal axis of refractive index anisotropy of the second birefringent layer is neither 0° nor 180° when the first line segment and the second line segment are projected on the transparent substrate such that an end A of the first line segment at a side of the transparent substrate and an end B of the second line segment at a side of the transparent substrate coincide with each other.

Abstract: Provided is a depolarizing plate having a superior degree of depolarization to conventional depolarizing plates. The depolarizing plate includes a light-transmitting substrate having a surface layer portion in which a fine pattern is provided that includes a plurality of curved lines randomly disposed at a pitch of no greater than a wavelength of light, and that exhibits structural birefringence.

Abstract: An inorganic polarizing plate, containing: substrate transparent to light of bandwidth for use; and wire grid layer containing metal wires aligned on the substrate with gaps shorter than wavelength of the light, the plate satisfying formulae (1) to (3): 0 nm<(DR?DL)??Formula (1); 0 nm<|GR?GL|??Formula (2); and 0.90?SR/SL?1.30??Formula (3), where DL is distance along thickness direction of the substrate in region RL between one metal wire W and metal wire WL next to W in the wire grid layer, and DR is distance along the thickness direction of the substrate in region RR between W and metal wire WR provided next to W and at opposite side to side where WL is provided; GL is gap between W and WL, and GR is gap between W and WR; and SL is ratio of DL to GL, and SR is ratio of DR to GR.

Abstract: A polarizing plate with high reliability even under a high-temperature or high-humidity environment is provided. A substrate has a non-formation region on a circumferential edge part, the non-formation region where a grid is not formed.

Abstract: Provided is a retardation element, including: a transparent substrate; a retardation imparting antireflection layer; a first birefringent layer; and a second birefringent layer which has approximately the same average thickness as that of the first birefringent layer and contacts the first birefringent layer such that an angle formed between a first line segment representing the principal axis of refractive index anisotropy of the first birefringent layer and a second line segment representing the principal axis of refractive index anisotropy of the second birefringent layer is neither 0° nor 180° when the first line segment and the second line segment are projected on the transparent substrate such that an end A of the first line segment at a side of the transparent substrate and an end B of the second line segment at a side of the transparent substrate coincide with each other.

Abstract: A phase difference element capable of reducing reflection of incident light and a manufacturing method for the phase difference element are disclosed. The phase difference element includes a transparent substrate 11, an interface anti-reflection film group 12 and an obliquely vapor deposited film 13. The interface anti-reflection film group is composed by one or more of alternately high and low refractive index films, with the film thicknesses of the respectively films being equal to or less than the wavelength of light in use. The obliquely vapor deposited film is formed by a plurality of layers of a dielectric material. These layers are alternately obliquely vapor deposited from two directions differing by 180° from each other. The refractive index of the interface anti-reflection film group 12 is higher than the refractive index of the transparent substrate 11 and lesser than that of the obliquely vapor deposited film 13.

Abstract: A polarizing plate with high reliability even under a high-temperature or high-humidity environment is provided. A substrate has a non-formation region on a circumferential edge part, the non-formation region where a grid is not formed.

Abstract: A phase difference element capable of reducing reflection of incident light and a manufacturing method for the phase difference element are disclosed. The phase difference element includes a transparent substrate 11, an interface anti-reflection film group 12 and an obliquely vapor deposited film 13. The interface anti-reflection film group is composed by one or more of alternately high and low refractive index films, with the film thicknesses of the respectively films being equal to or less than the wavelength of light in use. The obliquely vapor deposited film is formed by a plurality of layers of a dielectric material. These layers are alternately obliquely vapor deposited from two directions differing by 180° from each other. The refractive index of the interface anti-reflection film group 12 is higher than the refractive index of the transparent substrate 11 and lesser than that of the obliquely vapor deposited film 13 (FIG. 1).

Abstract: A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

Abstract: The optical module includes a main housing, a filter support component, which can affix an optical fiber, supported by a first attachment section, a light-emitting component supported by a second attachment section, a light-receiving component supported by a third attachment section, and first and second optical filters supported by a filter support component. The filter support component has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support component. The second optical filter is mounted on the second surface of the filter support component.

Abstract: The invention relates to a silica optical waveguide having a clad layer and a core formed from a silica material and a method of fabricating the same and provides a silica optical waveguide in which the position of a core can be easily recognized and a method of manufacturing the same. The waveguide has a lower clad layer formed from silicate glass on a silica substrate, a core formed from silicate glass on the lower clad layer, and an upper clad layer formed of silicate glass on the lower clad layer so as to embed the core. A difference of height is provided on a top surface of the upper clad layer such that a difference between reflections from the position of the core and from other positions can be recognized on the top surface of the upper clad layer.