Toray Industries, Inc.

Hidekazu Kunieda

Shinji Sato

Hironobu Maeda

Satoshi Matsuba

Masanori Takeuchi

Hideki Kojima

Keiichi Maeshima

Yoshiyuki Kiriyama

A plastic optical fiber for a medical device lighting decreases the cost of a lens and simplify the design of a lighting apparatus, wherein the plastic optical fiber for a medical device includes a core composed of a (co)polymer containing methyl methacrylate as a main component and is characterized by including a cladding material composed of a copolymer having a fluorine weight composition ratio of 60 to 74%, and by having a theoretical numerical aperture, NA, of 0.48 to 0.65 and, thus, the plastic optical fiber has a high numerical aperture and also has excellent translucency and flexibility.

Plastic optical fiber for medical device lighting and medical device lighting using same

A plastic optical fiber comprising a core and a cladding, wherein the cladding comprises at least one layer, and the cladding comprises a copolymer which comprises 10 to 35% by weight of ethylene, 45 to 69% by weight of tetrafluoroethylene, 20 to 45% by weight of hexafluoropropylene, and 0.01 to 10% by weight of a fluorovinyl compound represented by Formula (1): CH&#x2550;CX(CF)X(wherein Xrepresents a fluorine atom or a hydrogen atom, Xrepresents a fluorine atom, a hydrogen atom, or a hydrocarbon group, and n represents an integer from 1 to 10) as a copolymer component.

Plastic optical fiber and plastic optical fiber code

A polymer clad quartz optical fiber cord comprising a core of quartz glass, a clad of an organic polymer surrounding said core, a protective layer surrounding said clad and a covering layer surrounding said protective layer, and an organic polymeric tension fiber disposed between said protective layer and said covering layer characterized in that the cross-sectional structure of said cord satisfies the following formula: ##EQU1## where D3 represents the outer diameter (in mm) of said protective layer, D4 represents the inner diameter (in mm) of the covering layer, d represents the denier number of the tension fiber and is an integer from 1,000 to 5,000, and .rho. represents the relative density of the tension fiber.

Polymer clad quartz optical fiber cord

Growing community of inventors

Urayasu, Japan

Hidekazu Kunieda