Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Hitachi High-tech Corporation

Hideki Kihara

Yoshihiro Tsukamoto

Akinori Ishikado

Tsutomu Nakamura

Takeshi Kitayama

Hironori Kusumoto

Hiroho Kitada

Takeshi Morinaka

Masatoshi Kawakami

Noboru Fujikura

Hidenobu Tanimura

In a plasma processing apparatus, an additional viewing window is disposed between an infrared temperature sensor and a view window, and the additional viewing window is cooled to be retained at room temperature (20&#xb0; C. to 25&#xb0; C.), to reduce and to stabilize electromagnetic waves emitted from the viewing window. By correcting the value of the electromagnetic waves, the measurement precision of the temperature monitor is increased and it is possible to measure and to control the dielectric window temperature in a stable state.

Plasma processing apparatus

An optical fiber cable comprising an optical fiber, and a jacketing layer including at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically, wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically; a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc&#xb7;20 &#x3bc;m/(m&#xb7;day&#xb7;atm) or less; a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure; and the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (&#x3bc;m), an outer diameter of the optical fiber cable is denoted by B (&#x3bc;m), and a thickness of the jacketing outer layer is denoted by c (&#x3bc;m):900&#x2264;&#x2264;1100&#x2003;&#x2003;(i)0.40&#x2264;2&#xd7;/()&#x2264;0.70&#x2003;&#x2003;(ii).

Optical fiber cable, harness, and method of manufacturing optical fiber cable

There is provided a plastic optical fiber including a core and at least one layer of a clad formed on an outer circumferential surface of the core, wherein a transmission band is 100 MHz or wider, as measured under conditions of a wavelength of 650 nm and a launch NA=0.65; and a transmission loss is 350 dB/km or less, as measured under conditions of a wavelength of 650 nm and a launch NA=0.1, after exposure to an environment of a temperature of 105&#xb0; C. for 1000 hours.

Plastic optical fiber, plastic optical fiber cable, wire harness and vehicle

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 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

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.

Growing community of inventors

Tokyo, Japan

Hideki Kihara