Ferrule-core concentricity measurement systems and methods

A method of measuring a concentricity between an optical fiber core of an optical fiber held by a ferrule and a true center of the ferrule, comprising:

• generating ferrule distance data by measuring distances to a ferrule outside surface as a function of rotation angle using a distance sensor and rotating either the ferrule or the distance sensor about an axis of rotation that is off-center from the true ferrule axis;
• generating core location data about the optical fiber core by coupling light from the optical fiber core into a core sensor;
• using the ferrule distance data and core location data to determine a position of the true ferrule center relative to the optical fiber core;
• and
• measuring the concentricity as the distance between the true center of the ferrule and the optical fiber core.

A method of measuring a concentricity between an optical fiber core of an optical fiber held by a ferrule and a true center of the ferrule, comprising:

• generating ferrule distance data by measuring distances to a ferrule outside surface as a function of rotation angle using a distance sensor and rotating either the ferrule or the distance sensor about an axis of rotation that is off-center of the true ferrule axis;
• measuring a path of the optical fiber core during said rotating;
• using the ferrule distance data and the measured path of the optical fiber core to determine a position of the true ferrule center relative to the optical fiber core;
• and
• measuring the concentricity as the distance between the true center of the ferrule and the optical fiber core.