Method of calculating indicator of thin wire, method of evaluating quality of optical cable, and optical cable
AssigneeSumitomo Electric Industries, Ltd.
InventorsYutaka HOSHINA, Manabu SHIOZAKI
Life of this patent
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Abstract
A method of calculating an indicator of a thin wire according to the present disclosure includes: obtaining X-ray images of a plurality of cross sections of a cable having a plurality of thin wires, the plurality of cross sections being perpendicular to a long-side direction of the cable; finding a central position of each of the plurality of thin wires from each of the X-ray images of the plurality of cross sections; and finding an indicator representing a curve of each thin wire based on the central position of the thin wire.
Claims14
A method of calculating an indicator of a thin wire, the method comprising:
- obtaining X-ray images of a plurality of cross sections of a cable having a plurality of thin wires, each of the plurality of cross sections being perpendicular to a long-side direction of the cable;
- finding a central position of each of the plurality of thin wires from each of the X-ray images of the plurality of cross sections;
- and
- finding an indicator representing a curve of each thin wire based on the central position of the thin wire.
A method of calculating an indicator of a thin wire, the method comprising:
- obtaining X-ray images of a plurality of cross sections of a cable having a plurality of thin wires, each of the plurality of cross sections being perpendicular to a long-side direction of the cable;
- finding a central position of each of the plurality of thin wires from each of the X-ray images of the plurality of cross sections;
- and
- finding an indicator representing a curve of the plurality of thin wires as a whole based on the central position of each thin wire.
A method of evaluating quality of an optical cable, the method comprising:
- obtaining X-ray images of a plurality of cross sections of an optical cable having a plurality of optical fibers, each of the plurality of cross sections being perpendicular to a long-side direction of the optical cable;
- finding a central position of each of the plurality of optical fibers from each of the X-ray images of the plurality of cross sections;
- finding an indicator representing a curve of the plurality of optical fibers as a whole based on the central position of each thin wire;
- and
- determining whether or not the optical cable conforms to a quality criterion based on a comparison between the indicator and a criterion value.
An optical cable comprising a plurality of optical fibers, wherein an inverse number of a sum of an average value of local curvatures of the plurality of optical fibers and a value three times as large as a standard deviation of the local curvatures at −40° C. is 20 mm or more.
Dependencies are inferred from the claim text.