Assembly device for a light guide

An assembly device for a light guide, comprising:

• a sleeve having an end face;
• and
• at least one fiber bundle circumferentially fused at least in part or in sections at its circumferential surface with a glass tube, and the at least one fiber bundle with the glass tube having a common end face, the at least one fiber bundle with the glass tube forming a tapered region towards the common end face, wherein the common end face with the glass tube has a fused, rigid section and the common end face is designed or designable as a ground and/or polished surface, wherein the at least one fiber bundle with the glass tube is cohesively fixed or fixable in the tapered region at least in part or in sections in or on the sleeve in or on a fixing section of the sleeve by an adhesive, wherein the common end face of the at least one fiber bundle with the glass tube has an offset relative to the fixing section of the sleeve with the adhesive such that the common end face is arranged or arrangeable so as to be spaced apart with an offset from the fixing section with the adhesive, and the fixing section and the common end face are separated or separable from each other.