Abstract: To produce a light transmission apparatus with a reference objective, an optical fiber having a light transmission surface and a retaining element, the invention proposes the production of a cutout in the retaining element by molding of one outer contour section of the optical fiber. The cutout is used for radial, form-locked control of a guide section of the optical fiber which slides in the cutout with respect to the retaining element in order to change the position of the light transmission surface. The locking of the layers of the retaining element and of the light transmission surface with respect to the reference objective concludes the positioning procedure of the light transmission surface with respect to the reference objective.