Field of view converter for fiber-optic connector endface inspector

A fiber-optic connector inspection system, comprising:

• a fiber-optic connector inspector and a field of view (FOV) converter, the FOV converter comprising:
• a housing with a front end designed for connecting with a fitting tip for interfacing with a fiber-optic connector to be inspected, a rear end designed for connecting to a front portion of the fiber-optic connector inspector, and an internal light passage extending from the front end to the rear end;
• and
• a relay lens system disposed inside the housing across the light passage,
• wherein the optical working distance of the relay lens system is the same as the optical working distance of the fiber-optic connector inspector's microscope objective, wherein the optical working distance of the relay lens system is defined as the distance between the object plane and the front optical surface of the relay lens system, and the optical working distance of the fiber-optic connector inspector's microscope objective is defined as the distance between the object plane and the front optical surface of the fiber-optic connector inspector's microscope objective;
• and
• the ratio of the object distance to the image distance of the relay lens system is greater than 1,
• wherein, when the front end of the housing is connected to the fitting tip interfaced with the fiber-optic connector and the rear end of the housing is connected to the fiber-optic connector inspector, the optical axis of the relay lens system is aligned with the optical axis of the fiber-optic connector inspector;
• the image plane of the relay lens system coincides with the object plane of the fiber-optic connector inspector's microscope objective;
• and the connector endface is placed on the object plane of the relay lens system.