Connecting device for connection of the end portions of optical fibres

A connecting device for axial connection of end portions of optical fibers, comprising:

• a coupling housing having a longitudinal axis;
• a lens including a lens body having a longitudinal axis, a front end surface partially spherical, and an opposite, rear surface arranged perpendicular to the longitudinal axis of said lens body;
• a ring shaped, partially spherical or conical seat within said coupling housing being adapted to receive said lens body front end surface and being concentric with said longitudinal axis of said coupling housing;
• an optical fiber connecting plug having a front end and a rear end, a longitudinal axis and being received in said coupling housing, the front end of the plug being perpendicular to said longitudinal axis of said plug and contact with said rear end surface of said lens body and serving to press said partial spherical end surface of said lens body front surface against said seat to achieve a centering of said lens, said plug and said coupling housing being thereby supported relative to each other;
• a guide sleeve being coaxial with said coupling housing and received therein for guiding said plug into said coupling housing, the guide sleeve inserted in an axial recess provided in said coupling housing, said sleeve being fitted into said recess, which recess is concentric with said ring shaped seat in said coupling housing;
• and
• means for reception and fixation of several optical fibers.

A connecting device for axial connection of end portions of optical fibers, comprising:

• a coupling housing having a longitudinal axis;
• a lens including a lens body having a longitudinal axis, a front end surface partially spherical, and an opposite, rear surface arranged perpendicular to the longitudinal axis of said lens body;
• a ring shaped, partially spherical or conical seat within said coupling housing being adapted to receive said lens body front end surface and being concentric with said longitudinal axis of said coupling housing;
• an optical fiber connecting plug having a front end, a longitudinal axis, and a rear end and being received in said coupling housing, the front end of the plug being perpendicular to said longitudinal axis of said plug and contact with said rear end surface of said lens body and serving to press said partial spherical end surface of said lens body front surface against said seat to achieve a centering of said lens, said plug and said coupling housing being thereby supported relative to each other;
• and
• a guide sleeve being coaxial with said coupling housing and received therein for guiding said plug into said coupling housing, the guide sleeve being inserted in an axial recess provided in said coupling housing, the sleeve being fitted into the recess, which recess is concentric with said ring shaped seat in said coupling housing.