Patent ID: 7499609

Claim:
An optical switch, comprising: an input port for emitting a light beam; a reflector for reflecting the light beam incident thereon, the reflector being movable to be inserted in an optical pat of the light beam to stop on a predetermined insertion position, and to be removed from the insertion position to stop on a predetermined removal position; driving means for moving the reflector between the insertion position and the removal position; a first output port for receiving the light beam reflected by the reflector; and a second output port for receiving the light beam that is untouched by the reflector; wherein a blocking portion is provided at an end area of the reflector with respect to an insertion direction, the blocking portion preventing the light beam, when the light beam is incident thereon, from coupling to both the first and second output ports, the optical path of the light beam has a beam area having a predetermined beam diameter and a marginal area to be blocked to obtain a permissible crosstalk value, the marginal area being concentric with the beam area, and having a predetermined diameter larger than the beam diameter, on the insertion position, the reflector and the blocking portion cover the marginal area, and on the removal position, at least a part of the blocking portion remains in the marginal area.