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1. (CA2936064) OPTICAL CABLE
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CLAIMS
1. An optical cable comprising: an optical fiber unit including a plurality of optical fibers; a sheath configured to house the optical fiber unit in a housing portion, the sheath having a circular external form; two strength members disposed on opposing sides of the housing portion and embedded in the sheath; and two rip cords embedded in the sheath, wherein a first direction is defined by connecting the two strength members and a second direction is defined by orthogonally intersecting the first direction , in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than a dimension in the first direction, the two rip cords are disposed on opposing sides of the optical fiber unit wherein a line connecting the two rip cords is in the second direction, in the cross section of the optical cable, the cross-sectional shape of the housing portion is elliptical with a minor axis and a major axis, the plurality of optical fibers are twisted in an SZ manner, and L1/L2 is equal to or greater than 0.55, where LI is the length of the minor axis and L2 is the length of the major axis.
2. An optical cable comprising: an optical fiber unit including a plurality of optical fibers; a sheath configured to house the optical fiber unit in a housing portion, the sheath having a circular external form; two strength members disposed on opposing sides of the housing portion and embedded in the sheath; and
two rip cords embedded in the sheath, wherein a first direction is defined by connecting the two strength members and a second direction is defined by orthogonally intersecting the first direction , in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than a dimension in the first direction, the two rip cords are disposed on opposing sides of the optical fiber unit wherein a line connecting the two rip cords is in the second direction, in the cross section of the optical cable, the cross-sectional shape of the housing portion is bounded by two straight side portions in the second direction and two arc-shaped end portions joining the straight side portions, the plurality of optical fibers are twisted in an SZ manner, and L1/L2 is equal to or greater than 0.60, where LI is a dimension of the housing portion in the first direction and L2 is a dimension thereof in the second direction.
3. An optical cable comprising: an optical fiber unit including a plurality of optical fibers; a sheath configured to house the optical fiber unit in a housing portion, the sheath having a circular external form; two strength members disposed on opposing sides of the housing portion and embedded in the sheath; and two rip cords embedded in the sheath, wherein a first direction is defined by connecting the two strength members and a second direction is defined by orthogonally intersecting the first direction , in a cross section of the optical cable, a cross-sectional shape of the housing portion has a
dimension in the second direction greater than a dimension in the first direction, the two rip cords are disposed on opposing sides of the optical fiber unit wherein a line connecting the two rip cords is in the second direction, in the cross section of the optical cable, the cross-sectional shape of the housing portion is narrowed at a line connecting the two strength members, the plurality of optical fibers are twisted in an SZ manner, and L1/L2 is equal to or greater than 0.75, where LI is a dimension of the housing portion in the first direction and L2 is a dimension thereof in the second direction.
4. The optical cable according to any one of claims 1 to 3, wherein the strength members comprise a nonmetallic material.
5. An optical cable comprising: an optical fiber unit including a plurality of optical fibers; a sheath configured to house the optical fiber unit in a housing portion, the sheath having a circular external form; two strength members disposed on opposing sides of the housing portion and embedded in the sheath; and two rip cords embedded in the sheath, wherein a first direction is defined by connecting the two strength members and a second direction is defined by orthogonally intersecting the first direction , in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than a dimension in the first direction, the two rip cords are disposed on opposing sides of the
optical fiber unit wherein a line connecting the two rip cords is in the second direction, in the cross section of the optical cable, the strength members each comprise a pair of subsidiary strength members.