| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical coupler which can materialize a variety of structures easily and can be intended to reduce a cost. <P>SOLUTION: Separately for a light emitting sensor 11 and a light receiving sensor 12, a first-order molding of transluscent resins 23, 27 and a second-order molding of non-transluscent resins 24, 28 are carried out. Besides, a third-order molding of a coupling part 13 is carried out. Accordingly, not only the molding tool of the first-order molding and the molding tool of the second-order molding but also the molding tool of the third-order molding are needed, but as the transluscent resins 23, 27, the non-transluscent resins 24, 28 and the coupling part 13 are only formed by use of the respective molding tools, it is possible to simplify a structure of the molding tool and to reduce a cost of the molding tool. Further, if a plurality of types of molding tools are manufactured separately for the first-order to third-order moldings, the molding tools thereof are combined, whereby a variety of optical couplers can be provided at a low cost. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
