Mitsubishi Rayon Company, Limited

Matsushita Electric Industrial Co., Ltd.

Mitsubishi Chemical Corporation

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yoshihiro Tsukamoto

Kouji Hatano

Tsuyoshi Kimura

Eiji Takahashi

Kyoko Kawaguchi

Masataka Sugiura

Hideki Kihara

Kouji Asano

Yasushi Fujishige

Amane Aoyagi

Hideki Tamura

Keiichi Sakashita

Yoshihiro Uozu

Takeshi Kitayama

Tetsuya Jigami

Jun Okumura

Kikue Irie

Mitsuhiro Matsuo

Yasushi Kawaharada

Akinori Ishikado

Rie Akihara

Yoshiko Maeda

Keiji Iwasaka

Safety around a vehicle can be improved when there is a disagreement between an operation state of the vehicle and the notification contents notified from the vehicle. Abnormality notifying apparatus includes a determiner that determines whether or not there is a disagreement in correspondence relationship between operation control and notification control based on a first signal related to the operation control of vehicle and a second signal related to the notification control for notifying notification information according to the operation control to outside vehicle. When there is a disagreement in correspondence relationship, abnormality notifying apparatus notifies information indicating that the vehicle is in an abnormal state to outside vehicle.

Abnormality notifying apparatus, vehicle, abnormality notifying method, and non- transitory recording medium

The present invention provides a plastic optical fiber comprising a core and a sheath consisting of at least one layer, the plastic optical fiber having a transmission loss of 120 dB/km or less as measured by a 25 m-1 m cutback method under conditions of a wavelength of 525 nm and an excitation of NA=0.45, and satisfying either one of the following conditions when a thickness of the innermost sheath layer is 0.5 &#x3bc;m to 4.5 &#x3bc;m, an amount of foreign matter having a size of 2 &#x3bc;m or greater contained in the innermost sheath layer is 2000/cmor less, or a size X (&#x3bc;m) of foreign matter contained in the innermost sheath layer and an amount Y of the foreign matter (number/cm) satisfy formula (1) below: Y&#x2264;1200 X e(1). Such optical fibers have a low transmission loss of green light (in particular, light having a wavelength of 525 nm), enabling longer distance communication.

Optical fiber, method for manufacturing optical fiber, optical fiber cable, and sensor

Provided is an optical fiber cable having excellent flame retardancy, long-term heat resistance and mechanical characteristics. An optical fiber cable according to the present invention comprises an optical fiber and a cladding layer that is provided on the outer circumference of the optical fiber. The cladding layer contains a chlorinated polyolefin resin (A) and a polyolefin resin (B).

Optical fiber cable and sensor

Provided is an optical fiber which has exceptional heat resistance and is highly safe. This optical fiber has a core, and a sheath of a least one layer around the outside circumference of the core, the sheath including a polymer that contains a repeating unit (A) derived from a fluoroalkyl (meth)acrylate having a specific structure.

Optical fiber, optical fiber cable and communication equipment

An optical fiber cable is formed with an optical fiber and a coating layer made up of at least one layer provided on the outer periphery of the optical fiber. The material for forming the coating layer is made of a halogen-free resin composition containing polyolefin resin (A) and melt tension enhancer (B).

Optical fiber cable

Provided is a multi-core optical fiber which is capable of achieving the same level of light receiving capacity as that of a single-core plastic optical fiber, while being reduced in bending loss. A multi-core optical fiber according to the present invention has a plurality of cores and sea portions that are formed around each core. This multi-core optical fiber satisfies at least condition (1) or condition (2) below: (Condition 1): The occupancy rate of the total cross-sectional area of cores is 80&#x2dc;95% of the outer region in the cross section of a multicore optical fiber. (Condition 2): The occupancy rate of the total cross-sectional area of cores is 82&#x2dc;93% of the cross section of a multicore optical fiber.

Multicore optical fiber and multicore optical fiber cable

Provided is a plastic optical fiber cable including a plastic optical fibercomprising of a coreA and a claddingB, and a jacketing layer covering the plastic optical fiber, in which the jacketing layer includes at least two layers of an inner layerand an outer layer, the inner layeris formed of a resin comprising of a copolymer of ethylene and a (meth)acrylic compound, and the outer layeris formed of a fluorine-based resin. A plastic optical fiber cable excellent in flame retardance, appearance, and processability at the time of use is obtained from the plastic optical fiber cable described above.

Plastic optical fiber cable

A plastic optical fiber cable includes: a bare plastic optical fiber including a core formed of a polymer containing a methyl methacrylate unit, and a clad layer including a layer formed of a specific fluorine-containing olefin resin at least in the outermost layer; and a coating layer around the bare plastic optical fiber, the coating layer including a light-shielding coating layer formed of a specific nylon resin composition, a functional coating layer (C) and a functional coating layer (D) in this order, where one of the functional coating layer (C) and the functional coating layer (D) is formed of a resin composition (I) containing a polybutylene terephthalate resin as a major component or an ethylene-vinyl alcohol copolymer as a major component; the other is formed of a specific nylon resin composition (II); and a ratio of the thickness of the functional coating layer (C) to the thickness of the functional coating layer (D) is set to fall within a specific range.

Plastic optical fiber cable and method of transmitting signal

There is provided a contents distribution method in which burdens imposed on a distribution service provider and a contents user are lightened so that the contents user can use contents as many as possible at low cost. A system comprises terminal apparatuses, a portal server, a contents DB, a contents distribution server, a cabinet management server, and an accounting server. The cabinet management servermanages the contents usable limit and contents storage status of each of the terminal apparatuses. The portal serverand the cabinet management servercooperate with each other to generate the contents usable limit for each terminal apparatusand instruct the contents distribution serverto distribute contents in accordance with a contents distribution request given from the terminal apparatus. To distribute the contents, the remaining capacity of the contents usable limit in the terminal apparatusis obtained based on information concerned with available contents and deleted contents in the terminal apparatusso that an instruction is given to distribute the contents within the remaining capacity.

Content delivery method, content delivery service computer, content delivery service system, data discard recognition method, data discard recognition computer, and terminal

The invention provides a plastic optical fiber cable comprising a plastic optical fiber having a core/clad structure, a light blocking coating layer provided around the plastic optical fiber, and a protective coating layer provided between the outermost layer of the core/clad structure and the light blocking coating layer. The outermost layer of the core/clad structure is made of a fluorine-containing olefin polymer containing at least a tetrafluoroethylene unit, the crystal melting heat of the fluorine-containing olefin polymer being 59 mJ/mg or lower. The light blocking coating layer is made of a resin primarily containing a polyamide resin, the content of polyamide resin-derived monomers and oligomers being 1.5% by weight or lower.

There is provided a polymer composition comprising 5 to 100% by mass of a unit (A) of a lactone compound represented by a general formula (1) and 0 to 95% by mass of a unit (B) of (meth)acrylate as constitutional units, wherein the unit (A) of a lactone compound comprises a unit of an (S) isomer represented by a general formula (2) and a unit of an (R) isomer represented by a general formula (3) at a mass ratio of from 70/30 to 30/70; and wherein the polymer composition has a total light scattering loss of not more than 100 dB/km. The polymer composition is excellent in heat resistance and transparency.

Polymer composition, plastic optical fiber, plastic optical fiber cable, and method for manufacturing plastic optical fiber

A technique that can enhance convenience on each of both sides that distribute and use content under the conditions where use limitations intended to protect the copyright of content have diversified. According to this technique, a right gatewayis provided, that converts the condition of use in the right information of content subject to transmission from repositoryat the transmitting end to repositoryat the transmission destination in accordance with the right management capacity (capacity information) of content in repositoryat the transmission destination. With right gatewayperforming processing, the range of equipment and recording mediums capable of use of content expands, thereby promoting the use of content.

Information converting apparatus

A content delivery method for exporting content from a server to a terminal includes acquiring information on right management capability supported by the terminal, the information being reported from by terminal. The content that is appropriate to the terminal is selected based on the acquired information, and the selected content is delivered to the terminal in response to a request from the terminal.

An information export method for exporting content and right information of the content to a repository includes referring to the right information when the content is exported to the repository and checking whether the repository is allowed to have the content based on a description of the right information. When the repository is not allowed to have the content, it is determined not to export the content and the right information to the repository.

This invention relates to a copolymer prepared by polymerizing at least a vinyl compound (A) which gives a homopolymer with a refractive index of 1.50 or more, a fluoroalkyl (meth)acrylate (B) represented by the following formula (1) and methyl methacrylate (C), wherein a weight ratio of monomer (A) component/monomer (B) component ((A)/(B)) in the copolymer is within the range of 0.2 to 1; as well as a plastic optical fiber and a plastic optical fiber cable comprising a clad made of the copolymer. This invention can provide a plastic optical fiber and a plastic optical fiber cable exhibiting a reduced transmission loss, minimizing increase in a transmission loss even when being held as a bobbin-wound form, exhibiting a reduced bend loss and can transmit a wide-band data.  (In the above formula, X represents H or CH; and Rf represents fluoroalkyl having 7 to 14 carbon atoms both inclusive and 13 to 25 fluorine atoms both inclusive.).

Growing community of inventors

Toyama, Japan

Yoshihiro Tsukamoto