Abstract: The present invention relates to an optoelectronic device (100) for determining relative movements or relative positions of two objects, comprising a first object (10) fixed relative to a frame (1) of the device; a second object (20) mounted in spaced relation to the first object (10) and adapted for movement relative thereto; and at least one measuring cell for determining movement or displacement of the second object (20) relative to the first object (10). In one aspect, the invention provides a stop arrangement (40) for limiting the movement or displacement of the second object relative (20) to the first object (10), wherein the stop arrangement (40) comprises a mounting part (44) to be fixed relative to the frame (1) of the optoelectronic device (100), and at least one generally elongate stop member (41) arranged laterally of and substantially rigidly connected with the mounting part (44).