Fujikura Limited

Satoshi Matsunaga

Tsuyoshi Akamatsu

Shengyang Luo

Taku Onodera

An inspection method, for an optical fiber including a bare optical fiber and a light-transmitting coating layer that coats an outer peripheral surface of the bare optical fiber, includes: irradiating, with illumination light having directivity, an outer peripheral surface of a wound body that includes the optical fiber wound in multiple layers around a bobbin; receiving the illumination light reflected by the wound body and generating image data containing at least a part of an image of the illumination light; and determining, based on the image data, whether a stripe pattern is projected in the image. The stripe pattern is a state in which the illumination light repeatedly changes along a winding direction of the optical fiber.

Inspection method for optical fiber, inspection device for optical fiber, and method for manufacturing optical fiber-wound bobbin

A device that pulls out an optical fiber includes: a bobbin support that supports a bobbin rotatably about a rotation axis; a first pulling out unit that holds a first end of the optical fiber, pulls out a first portion of the optical fiber wound around the bobbin from a side of the first end in a state where the bobbin rotates in a predetermined direction, and returns a part of the first portion to the bobbin in a state where the bobbin rotates in a direction opposite to the predetermined direction; and a second pulling out unit that holds a second end of the optical fiber after the first pulling out unit pulls out the first portion from the side of the first end, and pulls out a second portion of the optical fiber wound around the bobbin from a side of the second end.

Device for pulling out optical fiber, method for pulling out optical fiber, and method for inspecting optical fiber

An optical fiber winding bobbin includes: a main winding body portion having an outer circumferential surface around which an optical fiber is wound; and a main winding flange that is disposed on one end portion of the main winding body portion in an axial direction and that protrudes radially outward. The main winding flange includes: an inner circumferential edge portion connected to the main winding body portion; a central portion; and an outer circumferential portion having a thin portion and positioned outward from the central portion in a radial direction. An axial thickness of the thin portion is smaller than an axial thickness of the inner circumferential edge.

Growing community of inventors

Suzuka, Japan

Satoshi Matsunaga