Abstract: A light diffusive protective film for a surface light source device for protecting other base material and improving the luminance of information display is disclosed which comprises a transparent plastic film and a concave/convex layer stacked on the surface of the transparent plastic film and satisfies requirements that: (1) the ten-point mean roughness of the uneven surface in the concave/convex layer is 0.5 ?m to 2.0 ?m; and (2) the count number of profile peaks is 16 to 60 as determined by measuring a roughness curve for the uneven surface of the concave/convex layer and determining the count number of profile peaks by a peak count method.

Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.

Abstract: Disclosed are a protective diffusion film, which does not scratch a lens film and a liquid crystal display device, does not become a refuse source or the like, and also has a suitable level of concealment effect, a process for producing the same, a surface light source device, and a liquid crystal display device. This protective diffusion film is used in a surface light source device provided with a lens film wherein the protective diffusion film is provided on a light outgoing surface of the lens film, and comprises: a transparent substrate layer; and a protective diffusion layer which is provided on the transparent substrate layer in its surface at least on the lens film side, has fine concaves and convexes on its surface, protects members which come into contact with the protective diffusion film, and is light diffusive.

Abstract: An antiglare film (1) comprises: a transparent base film (2), a light-diffusing layer (3) formed on the transparent base film (2), and an antiglare layer (4) formed on the light-diffusing layer (3). The antiglare film (1) has an internal haze value in the range of 35 to 75 and a total haze value in the range of 45 to 85. The light-diffusing layer (3) and/or the antiglare layer (4) contains translucent particles coated with a low-refraction coating.

Abstract: In an optical sheet 10 having a prism surface 16 formed by providing unit prisms 14 on the upper surface of a transparent base material 12, a coating layer 18 is provided on the reverse surface of the transparent base material opposite to the prism surface 16, spherical beads 20 are arranged projecting from the surface of the coating layer 18 by 1 to 10 &mgr;m in height, and the coating layer 18 is brought into contact with the flat and smooth surface 22A of the light-transmissive material 22 through the spherical beads 20 which are put between them. The spherical beads are 1 &mgr;m or less in half bandwidth of the distribution of particle diameters and are made uniform in height projecting from the coating layer 18.

Abstract: Disclosed is an antiglare film having excellent durability. The antiglare film is disposed on the front of a display device and comprises a transparent plastic film and, formed on the transparent plastic film, at least an antiglare layer having fine concaves and convexes on its surface, wherein the antiglare layer is formed of a transparent resin and satisfies requirements that: (1) the surface of the antiglare layer has a three-dimensional ten-point mean roughness of 0.9 &mgr;m to 3 &mgr;m; and (2) the mean spacing between adjacent profile peaks on a three-dimensional roughness reference plane is 20 &mgr;m to 50 &mgr;m.

Abstract: Disclosed is a film provided with a hardcoat which has high surface hardness and improved apparent scratch resistance. This film provided with a hardcoat comprises: a transparent substrate film; and, stacked on the transparent substrate film in the following order, a hardcoat and a slip layer. The hardcoat is formed of a cured product of a material comprising an ultraviolet-curable resin and a photopolymerization initiator which initiates the photopolymerization of the ultraviolet-curable resin upon exposure to ultraviolet light in its wavelength region other than the wavelength region absorbable by the transparent substrate film. The slip layer contains a slip agent.

Abstract: A metallic foil and a transparent substrate film are laminated with an adhesive layer. The roughness of the adhesive-layer-side surface (lower surface) of the metallic foil is such that the maximum height Rmax is more than 0 and less than 4 &mgr;m. As long as the maximum height Rmax falls in the range, the adhesive layer never contains air bubbles in such sizes that reflectance is adversely affected. The roughness of the surface (upper surface) of the metallic foil, opposite the adhesive-layer-side surface, is preferably such that the arithmetic mean roughness Ra is between 0.02 &mgr;m and 1 &mgr;m. As long as the arithmetic mean roughness Ra is in this range, it is possible to efficiently conduct vacuuming to bring, into close contact, a photosensitive resin layer and a photomask in sheet form placed on the photosensitive resin layer, before effecting the pattern-wise exposure of the photosensitive resin layer.

Abstract: In an optical sheet 10 having a prism surface 16 formed by providing unit prisms 14 on the upper surface of a transparent base material 12, a coating layer 18 is provided on the reverse surface of the transparent base material opposite to the prism surface 16, spherical beads 20 are arranged projecting from the surface of the coating layer 18 by 1 to 10 &mgr;m in height, and the coating layer 18 is brought into contact with the flat and smooth surface 22A of the light-transmissive material 22 through the spherical beads 20 which are put between them. The spherical beads are 1 &mgr;m or less in half bandwidth of the distribution of particle diameters and are made uniform in height projecting from the coating layer 18.

Abstract: In an optical sheet 10 having a prism surface 16 formed by providing unit prisms 14 on the upper surface of a transparent base material 12, a coating layer 18 is provided on the reverse surface of the transparent base material opposite to the prism surface 16, spherical beads 20 are arranged projecting from the surface of the coating layer 18 by 1 to 10 &mgr;m in height, and the coating layer 18 is brought into contact with the flat and smooth surface 22A of the light-transmissive material 22 through the spherical beads 20 which are put between them. The spherical beads are 1 &mgr;m or less in half bandwidth of the distribution of particle diameters and are made uniform in height projecting from the coating layer 18.

Abstract: There is provided a protective, diffusive film for use in a surface light source device provided with a lens film, said protective, diffusive film comprising: a transparent substrate layer; and a resin layer provided on the top surface and the under surface of the transparent substrate layer, the resin layers being free from fine particles and having fine concaves and convexes on the surface thereof, the difference in coverage between the resin layer provided on the top surface of the transparent substrate layer and the resin layer provided on the under surface of the transparent substrate layer being in the range of −20% to +20% in terms of the percentage of the coverage of one of the resin layers to the coverage of the other resin layer.

Abstract: A netlike metallic foil 11′ and a transparent substrate film 14 are laminated with an adhesive layer 13. The adhesive-layer 13-side surface of the metallic foil 11′ may be formed with a darkening layer 12. The roughness of the adhesive-layer 13-side surface (lower surface) of the metallic foil 11′ is preferably such that the maximum height Rmax be more than 0 and less than 4 &mgr;m, more preferably more than 0 and 2 &mgr;m or less. As long as the maximum height Rmax of this surface of the metallic foil 11′ falls in the above-described range, the adhesive layer never contains air bubbles in such sizes that reflectance is adversely affected. Further, the roughness of the surface (upper surface) of the metallic foil 11′, opposite to the adhesive-layer 13-side surface, is preferably such that the arithmetic mean roughness Ra is in the range between 0.02 &mgr;m and 1 &mgr;m.

Abstract: A polarization light splitting film having a light receiving side and a light transmitting side. The polarization light splitting film includes an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam, and a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side.

Abstract: There is provided an electromagnetic wave shielding member comprising: a transparent film substrate; and a mesh formed of a thin metal film stacked on the surface of the transparent film substrate through an adhesive and/or a pressure-sensitive adhesive, the adhesive and/or the pressure-sensitive adhesive comprising an absorber which can absorb specific wavelengths, i.e., the wavelengths of visible light and/or near-infrared.

Abstract: The present invention discloses a sheet for electromagnetic wave shielding, comprising a laminate of at least a transparent substrate film and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a meshy metal foil with densely arranged openings and being transparent. A protective film is stacked separably on the laminate either in its surface of transparent substrate film side or in its surface of electromagnetic wave shielding layer side.

Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.

Abstract: A lens film including a transparent substrate film and a concave or convex lens layer provided on a side of the substrate film. The lens layer contains a resin composition with conductive fine particles dispersed therein and has a surface resistivity of not more than 1012 &OHgr;/□. Another embodiment is a lens film including a transparent substrate film, a conductive layer provided on a side of the substrate film, and a concave or convex lens layer provided on the conductive layer, the conductive layer having a surface resistivity of not more than 1012 &OHgr;/□. The lens film can be part of a surface light source where the light-receiving side of the lens film is disposed on the light outlet side. The surface light source can be part of a liquid crystal display device.

Abstract: In an optical sheet 10 having a prism surface 16 formed by providing unit prisms 14 on the upper surface of a transparent base material 12, a coating layer 18 is provided on the reverse surface of the transparent base material opposite to the prism surface 16, spherical beads 20 are arranged projecting from the surface of the coating layer 18 by 1 to 10 &mgr;m in height, and the coating layer 18 is brought into contact with the flat and smooth surface 22A of the light-transmissive material 22 through the spherical beads 20 which are put between them. The spherical beads are 1 &mgr;m or less in half bandwidth of the distribution of particle diameters and are made uniform in height projecting from the coating layer 18.

Abstract: There is provided an electromagnetic wave shielding member which has see-through properties and electromagnetic wave shielding properties, is free from a change in color of an adhesive at the time of the formation of a mesh by etching, is improved in etchability, and can withstand etching at the time of the formation of the mesh. The electromagnetic wave shielding member according to the present invention comprises: a transparent film substrate; and a mesh consisting of a metal foil provided on the surface of the substrate through an adhesive, the adhesive comprising a styrene-maleic acid copolymer-modified polyesterpolyurethane and an aliphatic polyisocyanate.

Abstract: A backlight device including a light source for emitting light, a light guide for receiving the light from the light source and for emitting directional light having a maximum intensity in a first predetermined direction, a polarization light splitter having a planar, multi-layer structure; and a bean deflector, disposed between the light guide and the polarization light splitter, for deflecting the light from the light guide towards the polarization light splitter in a second predetermined direction substantially coinciding with a direction in which the polarization light splitter has a maximum polarization light splitting effect.