PURPOSE: To make the connection of light guides easy and sure and achieve the improvement in transmission efficiency by forming the end parts of the light guides in convex or concave form in the transmission direction of light signals.
CONSTITUTION: Light signal from a light emitting body 1 such as LED or the like is supplied to a photosensitive element 3 by way of a transmission line 2 connected 12 in series with light guides 11. The output of a power source circuit 4 is supplied to a load 5 by firing of the element 3. The respective connecting faces of the light guides 11a, 11b of the connection part 12 are formed to the curved faces of convex and concave form of the specific radii of curvature. Hence, the sure connection state may be obtained.
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SHIRASAKA YOSHIHIRO
OOHASHI HIROMICHI
