| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide bundle connecting device capable of suppressing the increase of the diameter size of an endoscope side light guide bundle and keeping the optical coupling efficiency high when realizing a connecting structure separating the end faces of the light guide bundles on the light source side and endoscope side. SOLUTION: Both light guide bundles are separately arranged face to face to satisfy the relation Lx<=(R-S)/tanθ, where R is a radius o the light outgoing face of a light source side light guide bundle 100, S is radius of a light incidence face of an endoscope side light guide bundle 200, Lx is the interval between them, andθis the opening angle of an optical fiber. Light transmission efficiency can be increased without providing an optical system between both light guide bundles 100, 200, and the structure can be simplified.
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