| 摘要 |
<p>An waveguide type optical unit performing monitoring, e.g. detection of relative position between an insertion plate and a groove, detection of abnormal motion of the insertion plate, detection of incorrect stationary position, and the like. The waveguide type optical unit, disposed at the intersection of first and second optical waveguides and having a groove (13) for controlling the optical path of the optical waveguide, comprises an insertion plate (14) disposed to be inserted into the groove (13), means for providing a magnetostatic field where the vector product of the speed vector (A) and the magnetic field vector (B) of the insertion plate (14) is not 0, a cantilever (19) having electric wiring (20) partially including the wiring part (20a) in the direction orthogonal to the speed vector and the magnetic field vector and supporting the insertion plate (14), and means for detecting a current being induced in the electric wiring (20) and detecting relative position of the insertion plate (14) and the groove (13).</p> |
