| 摘要 |
The invention discloses an optical deflection switch which uses the output focal plane of a lens more effectively. This is achieved by combining a tapered block of a light-transmissive material having a reflective surface and a second face, wherein the second face includes an input/output port and the reflective surface provides reflection of a beam of light passing through the input/output port into the tapered block with a first block of a light-transmissive material having a first face and a second face, wherein the first face includes an input port thereon for receiving a collimated beam of light and the second face is for providing total internal reflection of the beam of light in a first switching state and for acting as an output/input port for optical communication with the input/output port of the switching block when the total internal reflection is frustrated in a second switching state. The reflective face of the switching block and the second face of the second block have an angle other than zero defined therebetween. The optical deflection switch further includes a rotator for turning the switching block around an axis into one of a plurality of selectable positions, each of the plurality of selectable positions for changing a plane of incidence of the beam of light.
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