| 摘要 |
PURPOSE:To eliminate coupling loss and unbalance by placing two pieces of mirrors so as to face to each other at a prescribed angle and providing a mechanism for moving horizontally and turning these mirrors integrally and a condenser lens of a large diameter between the mirrors and an optical fiber for output. CONSTITUTION:The light which is made incident from fibers 1, 1' on an input side passes through lenses 2, is reflected by a two-faced mirror 6 formed of two pieces of mirrors 61, 62, is condensed with a large diameter lens 7 and is made incident to a fiber 5 on an output side. When the mirror 6 is moved in an arrow X direction as shown by an alternate long and two short dashes line, the reflected light of the incident light from the fiber 1 deviates from the large-diameter lens 7 as shown by a dotted line and only the incident light from the fiber 1' is made incident to the fiber 5. When the mirror 6 is moved conversely in an arrow Y direction, only the incident light from the fiber 1 is made incident to the fiber 5. If the mirror 6 is rotated in an X' or Y' direction, only the incident light from the fiber 1' or 1 is made incident to the fiber 5. The coupling loss and unbalance are thus eliminated. |
