An optical switch (1) includes a cover (10), a base (20), two input ports (30,50), two output ports (40,60), a movable reflecting element (70), a fixed reflecting element (80), and a driving means (90). The movable reflecting element has a first mirror (71) and an opposite facing second mirror (72). The fixed reflecting element has a third mirror (81). The movable reflecting element is movable by the driving means from a first position, in which signals transmit from input to output ports without reflection from mirrors, to a second position, in which reflection from the mirrors effects a switching of the optical signals to different output ports. The presence of the fixed reflecting element automatically compensates for a distance between the first and second mirrors, allowing reflected signals to accurately align with respective output ports.