Patent ID: 7515782
Filing Date: 2009-04-07
Classification: G02B

Abstract:
1. A two-channel fiber optic rotary joint for optic signal transmissions comprising: a pair of relatively rotatable members comprising a rotor and a stator; said rotor is mounted in said stator to rotate relatively thereto through a pair of ceramic ball bearings; a first fiber optical collimator assembly being secured in a central hole of one of said rotatable members; a second fiber optical collimator assembly being secured in a central hole of another of said rotatable members; a shaft seal, a seal holder and o-ring means to seal the collimator assembly of said stator and said rotor to form a sealed space with said first fiber optical collimator assembly and second fiber optical collimator assembly; wherein each of said first fiber optical collimator assembly and said second fiber optical collimator assembly further comprises: a first fiber secured in a central hole of the holder of said first fiber optical collimator assembly and protruded out of said central hole of the holder of said first fiber optical collimator assembly; and a second fiber secured in a central hole of the holder of said second fiber optical collimator assembly and recessed inside said central hole of the holder of said second fiber optical collimator assembly.