Patent ID: 8554029

Claim:
A single channel bi-directional limited rotation through-bore optical slip ring comprising: a rotor spool with a first gear; an off axis spool with a second gear; a control rotor with a third gear, wherein the control rotor is coupled to the rotor spool via at least one gear; a plurality of housing members; the first and the second gears are selectively designed so that the off axis spool rotates in the reverse direction of the rotor spool; and an on axis single channel fiber optic rotary joint with a first optical fiber and a second optical fiber; wherein the first fiber is coupled to the fiber mounted on the rotor spool and the second optical fiber forms the stator side input/output fiber for the bi-directional limited rotation off axis rotary joint; wherein the second optic fiber, wound around the barrel of the rotor spool in one direction, is running over to the off-axis spool and wound in the opposite direction and further connected to said on axis single channel fiber optic rotary joint.