| 摘要 |
<p>An optical position detector having an excellent detection characteristic at long measurement distance is achieved by a structure provided with an input optical fiber 2, output optical fibers 3, 4, a slab light guide which is disposed on a substrate 1 and has a branched light guide 14, a first cylindrical lens 11 which converts an optical path of light emerging from the slab light guide 6 and which condenses said light on a surface to be detected, and a second cylindrical lens 12 which converts an optical path of light reflected from said surface to be detected and which guides said light to said slab light guide 6. <IMAGE></p> |
