| 摘要 |
PURPOSE:To reduce the required number of reflectors by making the reflectors movable. CONSTITUTION:Reflecting mirrors 5-8, each one for each row, of the 4X4 matrix which the light input-output terminals a-d of the first light input-output terminal group I and the light input-output terminals 1-4 of the second light input-output terminal groups II form are made movable in the row direction along guides 9-12, whereby the optical path changing part III is formed. If the reflecting mirror 5 is moved along the guide 5 and is locked in the matrix intersection point (a, 1) by this, the light from the terminal a is entered to the terminal 1 and if the reflecting mirrors 6-8 are moved respectively to the matrix intersection points (b, 3), (c, 2), (d, 4) and locked, the light is transmitted from the terminals b, 2, 4, to the terminals 3, b, d, thus the intended object is achieved. |
