PROBLEM TO BE SOLVED: To provide an optical probe of a two-layer structure having a tube body in an inner layer and a coil member in an outer layer, wherein the bondability between the tube body and the coil-like member is improved and at the same time the diameter of the optical probe is reduced and kink resistance thereof is improved.SOLUTION: A tube 110 for a probe for encapsulating an optical fiber includes a tubular member 111 as a tube body, and a coil-like member 112 which is made of a spirally wound rectangular copper wire and is externally fitted on the tubular member 111. The coil-like member 112 has a predetermined inner diameter. The tubular member 111 is made larger in diameter after inserted into the coil-like member 112 in a state where its diameter is made smaller than the inner diameter of the coil-like member 112, and thus the coil-like member 112 is externally fitted to the tubular member 111.COPYRIGHT: (C)2013,JPO&INPIT【課題】内層にチューブ本体を有し外層にコイル部材を有する二層構造においてチューブ本体とコイル状部材との密着性を向上させると共に、光学プローブの細径化と耐キンク性向上との両立を図ること。【解決手段】光ファイバーを内包するためのプローブ用チューブ110は、チューブ本体としての管状部材111と、螺旋状に巻回された平角線から成り、管状部材111に外嵌されているコイル状部材112と、を有する。コイル状部材112は、所定の内径を有する。管状部材111は、コイル状部材112の内径よりも細径化された状態でコイル状部材112に挿通された後に太径化され、これにより、コイル状部材112は、管状部材111に外嵌される。【選択図】図3
