Patent ID: 7792400
Filing Date: 2010-09-07
Classification: G02B

Abstract:
1. An off-axis fiber optic slip ring assembly for use with single mode and multi-mode optical fibers comprising: a stator with a central through bore and a rotor with a central through bore, able to rotate independently of each other on a common axis through a pair of bearings; a first fiber optical collimator mounted on said rotor and able to rotate with said rotor around said common axis; a hollow mirror array, having a number of concentric cylindrical members with central through bore, fixed in said stator, coaxially orientated with said rotor at a specific distance from a first gear portion of the rotor; rotor means having a concentric first gear on the inward end portion of the rotor; a second gear engaging with said first gear, having a concentric shaft, able to rotate around the axis of said shaft in a bore of said stator through bearings; a third gear concentrically attached on said second gear, able to rotate with said second gear; a fourth gear engaging with said third gear, having a concentric shaft with a through bore, able to rotate around the axis of said shaft in a bore of said stator through bearings; a first rhomboid prism attached on the inward end portion of said fourth gear radially, with one end portion of the rhomboid prism covering said through bore of said fourth gear on the inward side of said fourth gear; a first right angle prism attached on said stator, parallel located with said first rhomboid prism with one end portion of the rhomboid prism covering said through bore of said fourth gear on the outward side; a second fiber optical collimator fixed in a bore of said stator, coaxially aligned with said first right angle prism with a specific axial distance; a fifth gear, sixth gear, and seventh gear being exactly the same gear as said second gear, third gear, and fourth gear respectively, and mounted in said stator in a symmetrical position to the said common axis through bearings; a second rhomboid prism and second right angle prism being exactly same as said first rhomboid prism and first right angle prism respectively, and mounted in said stator in a symmetrical position to the said common axis; a third fiber optical collimator fixed in a bore of said stator, coaxially aligned with said second right angle prism with a specific axial distance; an optical coupler, fixed on the said stator, connected with said second and said third fiber optical collimator on one side.