| 摘要 |
<p>PURPOSE:To obtain the titled device which can be manufactured with good workability and can obtain a high signal transmission rate after securing a high positional accuracy by a method wherein the center of at least one lens of convex lenses is contrived to be in the positional relation of horizontal deviation from the center axis of the element under the convex lens toward the center axis of the other element. CONSTITUTION:The center axis AL1 of a semi-spherical lens L1 on the light emitting side is horizontally deviated from the As1 of the light emitting element 10 to the center of the device, i.e., a position toward the side of the light receiving element. In the same manner, the center axis AL2 of a semi-spherical lens L2 on the light receiving side is horizontally deviated to the center of the device, i.e., the side of the light emitting element. After forming resin sealed bodies 131 and 132 of such form, light non transmitting resin body 15 having optical windows W1 and W2 so as not to block the semi-spherical lens parts L1 and L2 is formed, and light emitting side resin sealed bodies 131 and 132 are fixed in an integral body. Thereby, the titled device which has a high signal transmission efficiency, enabling to set the detection distance to an object to be detected simply and accurately, and can be manufactured with good workability can be obtained.</p> |
