Optical waveguide hose
AssigneeBridgestone Corporation
InventorsMinoru Ishiharada, Rikuhei Itou, Itsuo Tanuma, Kazuo Naito, Yasuhiko Matsumuro, Takao Aoki, Kiyoshi Koyama
Life of this patent
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Abstract
An optical waveguide hose includes a hollow tubular cladding, a fluid core in the cladding, the fluid having a higher index of refraction than the cladding, and sealing plugs mated with opposite end openings of the cladding. In one form, the core fluid is filled in the cladding under positive pressure. In another form, a sheath of a gas barrier material encloses the outer periphery of the cladding. The pressurized fluid core or the gas barrier sheath prevents air from penetrating into the core, allowing the hose to maintain its light transmission function.
Claims12
An optical waveguide hose comprising;
- a hollow tubular cladding having opposite end openings,
- a core of a fluid having a higher index of refraction than the cladding, the fluid core being filled in the cladding such that the internal pressure is at least 0 kg/cm.sup.2 at the minimum service temperature and below the withstand pressure of the cladding at the maximum service temperature, and
- sealing plugs mated with the end openings of the cladding.
An optical waveguide hose comprising;
- a hollow tubular cladding having opposite end openings,
- a core of a fluid having a higher index of refraction than the cladding, the fluid core being filled in the cladding,
- sealing plugs mated with the end openings of the cladding, and
- a sheath of a gas barrier material enclosing the outer periphery of said cladding, said sheath of the gas barrier material is at least one selected from the group consisting of polyvinyl chloride, polyvinyl alcohol, ethylene-vinyl alcohol copolymers and polyvinylidene chloride.
An optical waveguide hose comprising:
- a hollow tubular cladding having opposite end openings,
- a core of a fluid having a higher index of refraction than the cladding, the fluid core being filled in the cladding such that the internal pressure is at least 0 kg/cm.sup.2 at the minimum service temperature and below the withstand pressure of the cladding at the maximum service temperature,
- sealing plugs mated with the end openings of the cladding, and
- a sheath of a gas barrier material enclosing the outer periphery of said cladding.
An optical waveguide hose comprising:
- a hollow tubular cladding having opposite end openings,
- a core of a fluid having a higher index of refraction than the cladding, the fluid core being filled in the cladding under pressure,
- sealing plugs mated with the end openings of the cladding, and
- a sheath of a gas barrier material enclosing the outer periphery of said cladding, said sheath of the gas barrier material is at least one selected from the group consisting of polyvinyl chloride, polyvinyl alcohol, ethylene-vinyl alcohol copolymers and polyvinylidene chloride.
Dependencies are inferred from the claim text.