Patent ID: 6795604
Filing Date: 2004-09-21
Classification: G02B

Abstract:
An optical switch for switching light paths coming from an input port between a transmission and a reflection output ports, comprising:a prism having a reflective surface for switching optical paths; a rotation device allowing at least the input port to rotate around the prism between a first position and a second position; wherein, an angle of incidence of an input light beam from the input port on the reflective surface changes with the rotation of the input port, and the input port rotates between a first position, wherein the angle of incidence is less than a critical angle of the reflective surface and therefore the input light beam passes through the reflective surface of the prism and is output through the transmission output port, and a second position, wherein the angle of incidence is larger than or equal to the critical angle of the reflective surface and therefore the input light beam is totally reflected by the reflective surface and is output through the reflection output port.