Optical cable with bending mechanism.

摘要

An optical cable of the present invention comprises: an optical fiber sensor (1), the optical fiber sensor (1) having an optical fiber having an external circumferential wall portion and a flexible coating film covering the external circumferential wall portion; and a tube member (3) with a good flexibility, the tube member (3) having an axis and an internal circumferential wall portion and receiving the optical fiber sensor (1) along the axis such that the coating film faces the internal circumferential wall portion of the tube member, the tube member (3) having a portion where the axis is bent; wherein fluid (2) is sealed in between the coating film and the internal circumferential wall portion of the tube member with its pressure being changeable.