Bridgestone Corporation

Masato Sugimachi

Itsuo Tanuma

Minoru Ishiharada

Hideo Sugiyama

Masato Yoshikawa

Kazuo Naito

Yasuhiro Morimura

Taichi Kobayashi

Hiroshi Fukuyama

Atsushi Hotta

Tatsuo Terahama

Shinji Saito

Shingo Ono

Torao Hashimoto

Masayuki Matsuzaki

The present invention aims to provide a near-infrared absorption film having excellent near-infrared blocking properties and visible light transparency over a wide wavelength range, and attractive appearance. It further aims to provide a near-infrared absorption film having excellent near-infrared blocking properties, visible light transparency, good appearance and excellent durability such as anti-deterioration properties. The film may comprise a transparent substrate, and a near-infrared absorption layer containing a cyanine compound represented by the formula (1), and a diimonium compound.wherein, in the formula (1), A is a divalent bonding group comprising ethylene. Rand Rare monovalent groups comprising a carbon atom. Xis a monovalent anion. The film may also comprise a transparent substrate, and a near-infrared absorption layer containing a layer containing the cyanine compound represented by the formula (1) and a layer containing a diimonium compound.

Near-infrared absorption film

An electromagnetic-wave shielding and light transmitting plate is formed by two transparent base plates, a conductive mesh member, and a near infrared ray blocking film, wherein the conductive mesh member and the near infrared ray blocking film are interposed between the transparent base plates and are integrally bonded together. A panel laminated plate is formed by a transparent base plate, a PDP body, a conductive mesh member, and a near infrared ray blocking film, wherein the conductive mesh member and the near infrared ray blocking film are interposed between the transparent base plate and the PDP body and are integrally bonded together. Either in the above electromagnetic-wave shielding and light transmitting plate or in the panel laminated plate, the near infrared ray blocking film is a combination of two or more of near infrared ray blocking layers.

Electromagnetic-wave shielding and light transmitting plate and panel laminated plate

An electromagnetic-wave shielding and light transmitting plate includes a transparent base plate ( ), an electromagnetic-wave shielding member such as a conductive mesh ( ), an antireflection film ( ) as a front most layer, and a near infrared ray blocking film which are laminated and integrated, wherein the near infrared ray blocking film ( ) includes a base film and a near infrared ray blocking layer on a surface of the base film, and the near infrared ray blocking layer contains a near infrared ray absorbing agent composed of diimmonium compound and either a 1,2-benzenethiol copper complex compound or copper dimethyldithiocarbamate.

Electromagnetic-wave shielding and light transmitting plate and display device

A light transmission tube includes a tubular clad and a core section having a higher refractive index than that of the tubular clad. A belt-like reflecting layer is formed between the tubular clad and the core section, extending in the longitudinal direction of the tubular clad, in a manner such that a light passing through the core section is reflected and scatterred by the reflecting layer and then emitted from an outer surface area of the tubular clad, which outer surface area is located opposite to one side of the tubular clad where the reflecting layer has been formed. Further, the reflecting layer may be so formed that a light is allowed to be emitted in a plurality of directions. Moreover, the belt-like reflecting layer may be formed into a spiral configuration. The width of the belt-like reflecting layer may be changed in the longitudinal direction of the light transmission tube. The tubular clad is allowed to have a non-circular cross section. The clad formation material may contain an ultraviolet light shielding material or an ultraviolet light absorbing material.

Light transmission tubes

In an optical transmission tube comprising a tubular cladding and a core within the cladding having a higher index of refraction than the cladding, a strip-shaped reflecting layer is longitudinally extended between the cladding and the core. Light passing through the core is reflected and scattered by the reflecting layer to emerge from the tube through an area of the outer surface of the cladding opposed to the reflecting layer. The optical transmission tube is prepared by dispersing scattering particles in a monomer solution; filling a tubular cladding with the monomer solution; resting the cladding horizontally for allowing the scattering particles to settle on a lower inner surface of the cladding; and thereafter, causing the monomer solution to polymerize and solidify within the cladding.

Optical transmission tube, making method, and linear illuminant system

In an optical waveguide tube comprising a tubular cladding filled with a solid core having a higher refractive index than the cladding, a light transmissive window member is disposed in close contact with at least the end face of the core on a light incident side for protecting the core end face from thermal influence and contamination. Means disposed around the cladding and the window member for securing the window member to the cladding may be a tape wrapped around them or a heat shrinkable sleeve or a ferrule. Alternatively, a ferrule surrounding the outer periphery of the cladding at each end is fastened for securing the cladding to the core at each end for preventing the core from projecting out of the cladding. The ferrule may have a collar disposed in abutment with the core end face.

Optical waveguide tube

The invention relates to an optical waveguide tube comprising a tubular cladding filled with a solid core having a higher refractive index than the cladding. In one form, a resin material having a Tg of up to 50.degree. C. and a modulus of elasticity of up to 10.sup.9 dyne/cm.sup.2 is used as the core. In another form, a copolymer of acrylic acid, methacrylic acid or a lower alcohol ester thereof with a higher alkyl (meth)acrylate is used as the core, preferably in combination with a phosphate, aromatic carboxylate, aliphatic carboxylic acid, aliphatic carboxylate or glycol. In a third form, such an optical waveguide tube is prepared by filling a hollow tubular transparent cladding having opposite open ends with a liquid monomeric charge and causing the monomeric charge to polymerize while pressurizing the exposed surfaces of the monomeric charge inwardly from the opposite open ends along an axial direction of the cladding, thereby forming a core within the cladding.

Optical waveguide tube and method of making

A light guide includes a hollow tubular cladding of a fluorocarbon resin having a methacrylic or acrylic monomer graft polymerized inner surface. The cladding is integrally filled with a core of a methacrylic or acrylic resin which is polymerized to the graft polymerized surface.

Growing community of inventors

Kodaira, Japan

Masato Sugimachi