Patent ID: 8520280

Claim:
An apparatus for dynamically shifting a light beam with regard to an optic, which focuses the light beam and which comprises an optical axis and a pupil, to scan an object with the focussed light beam in a two-dimensional scanning range, the apparatus comprising: beam deflectors which deflect the light beam in two different directions with regard to the optical axis of the optic; and a controller for controlling the beam deflectors; wherein each beam deflector deflects the light beam in one direction by a deflection angle which is dynamically variable by the controller; wherein, for a first dimension of the two-dimensional scanning range, at least a first beam deflector and a second beam deflector are connected in series which are controllable independently on each other and which, in a first one of the two directions, deflect the light beam by a first deflection angle and a second deflection angle, the first deflection angle and the second deflection angle being dynamically variable by the controller independently on each other; wherein, for a second dimension of the two-dimensional scanning range, at least a third beam deflector and a fourth beam deflector are connected in series which are controllable independently on each other and which, in a second one of the two directions, deflect the light beam by a third deflection angle and a fourth deflection angle, the third deflection angle and the fourth deflection angle being dynamically variable by the controller independently on each other and on the first deflection angle and the second deflection angle; and wherein the controller predetermines the deflection angles of all beam deflectors for each point of the two-dimensional scanning range in such a way that the light beam, in scanning the whole two-dimensional scanning range, always runs through a same point of the pupil of the focussing optic.