| 摘要 |
The invention provides an optical deflection switch having reduced insertion loss. The device includes a switching block having a reflective surface and a transmissive face, a second block having a first and a second face, and a switch for selectively switching the device from a first switching state to a second switching state. The optical deflection switch of the present invention provides a switch in which a deflected beam is directed to one of a plurality of output ports at normal incidence and hence the insertion loss of the optical deflection switch is reduced. The output beam in the first switching state is parallel to the output beam in the second switching state. In order to reduce the insertion loss, the second block has an angle defined between the reflective surface of the switching block and the second face of the second block such that a normal to the reflective surface of the switching block bisects another angle defined between a beam passing into the switching block from the second block and a beam reflected from the reflective surface of the switching block.
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