Optical fiber coupling fitting

Abstract

An optical fiber coupling fitting includes a clamping member, a central portion of which is removed for receiving an optical fiber holder which is inserted into the central hole portion. Transverse to a slot in the clamping member is a tapped bore for receiving a screw by which the distance between the opposite faces of the slot may be reduced, thereby reducing the area of the central hole portion of the clamping member and causing clamping engagement between the walls of the hole and the outer surface of a larger diameter end of the optical fiber holder. Loosening of the screw releases the clamping engagement between the walls of the hole and the optical fiber holder so that the fiber holder may be adjusted in a direction parallel to the axis of the optical fiber. The clamping member is affixed to a mounting block, which retains the optical element, by means of a plurality of screws passing through holes in the clamping member and engaging threaded holes in the mounting block. Loosening of these plurality of screws permits the position of the clamping member relative to the optical element retained in the mounting block to be adjusted, in order to properly align the optical fiber with the light coupling face of the optical element.