| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical waveguide device for a touch panel where, though a plurality of optical waveguides are coupled, optical coupling loss of a core is small in a coupling part and an optical signal does not impinge on an adjacent core. <P>SOLUTION: An optical waveguide device for a touch panel is installed along the peripheral edge of a display screen of a touch panel. Optical waveguides A1 and A2 for emission and optical waveguides B1 and B2 for incidence are alternately arranged along one end edge of the display screen, and end surfaces at end parts of the optical waveguides A1 and A2 for emission and those of the optical waveguides B1 and B2 for incidence are butted against each other to couple both the optical waveguides A1 and A2 and the optical waveguides B1 and B2. An end part of a core 2 of the optical waveguides A1 and A2 for emission is formed into a lens portion 2A for light emission, and an end surface of the lens portion 2A is formed into a lens surface for light emission. An end part of a core 2 of the optical waveguides B1 and B2 for incidence is formed into a lens portion 2B for light incidence corresponding to the lens portion 2A for light emission, and an end surface of the lens portion 2B is formed into a lens surface for light incidence on which emitted light from the lens surface for light emission impinges. <P>COPYRIGHT: (C)2012,JPO&INPIT |
