An optical arrangement for deflecting a light beam in two substantially mutually perpendicular directions comprising a first rotary drive defining a first axis of rotation, a second rotary drive defining a second axis of rotation, wherein the axes are mutually perpendicular, a first mirror rotated by the first rotary device, a second mirror rotated by the second rotary device, a third mirror arranged in an angular position with respect to the first mirror wherein the first and third mirror rotate jointly about the first axis, a pivot point is defined on the second mirror, wherein the light beam pivots about the pivot point which lies on the second axis of rotation of the second mirror, and the first, second and third mirrors are arranged, that a light beam running between the second and the third mirrors and the second axis of rotation are always substantially in one plane and the plane is perpendicular to the first axis of rotation.