Abstract: A multiple-reflection delay line member for a laser beam, including mirror elements for the multiple reflection of the laser beam to reduce the dimensions of a laser resonator at a predetermined optical length, wherein the mirror elements are comprised of two oppositely arranged, longitudinally extending polished surfaces of a glass element which extends in one direction and which further comprises a polished laser beam entry surface as well as a polished laser beam exit surface, wherein the mirror element surfaces of the glass element are located between the entry surface and the exit surface and, with the laser beam, form an angle that at least equals the critical angle for total reflection, whereas the entry surface and the exit surface with the laser beam of the glass element define an angle that is smaller than the critical angle for total reflection.