Device for diverting a light beam incoming on an optical axis, - comprising four rotating mirrors (2 to 5) which, one after the other, deviate the light beam by reflection at their mirror surfaces, - wherein one of the four rotating mirrors (2 to 5) can be swivelled about a first swivel axis running parallel to its mirror surface and orthogonal to the optical axis, - wherein another of the four rotating mirrors (2 to 5) can be swivelled about a second swivel axis running parallel to its mirror surface and parallel to the first swivel axis, - wherein a further of the four rotating mirrors (2 to 5) can be swivelled about a third swivel axis running parallel to its mirror surface, and - wherein a remaining of the four rotating mirrors (2 to 5) can be swivelled about a fourth swivel axis running parallel to its mirror surface, which together with the third swivel axis runs within one plane, characterised in, - that, in one swivel position of the four rotating mirrors (2 to 5) about their four swivel axis (7 to 10), the light beam deviated by all four rotating mirrors (2 to 5) runs on the optical axis again, - wherein the plane runs orthogonal to the first swivel axis, - wherein the third swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein the fourth swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein swivelling of the further of the four rotating mirrors (2 to 5) and the remaining of the four rotating mirrors (2 to 5) diverts the light beam both in direction of the first swivel axis with regard to the plane and along the plane, and - wherein the swivelling of the one of the four rotating mirrors (2 to 5) and the other of the four rotating mirrors (2 to 5) diverts the light beam along the plane. - comprising four rotating mirrors (2 to 5) which, one after the other, deviate the light beam by reflection at their mirror surfaces, - wherein one of the four rotating mirrors (2 to 5) can be swivelled about a first swivel axis running parallel to its mirror surface and orthogonal to the optical axis, - wherein another of the four rotating mirrors (2 to 5) can be swivelled about a second swivel axis running parallel to its mirror surface and parallel to the first swivel axis, - wherein a further of the four rotating mirrors (2 to 5) can be swivelled about a third swivel axis running parallel to its mirror surface, and - wherein a remaining of the four rotating mirrors (2 to 5) can be swivelled about a fourth swivel axis running parallel to its mirror surface, which together with the third swivel axis runs within one plane, characterised in, - that, in one swivel position of the four rotating mirrors (2 to 5) about their four swivel axis (7 to 10), the light beam deviated by all four rotating mirrors (2 to 5) runs on the optical axis again, - wherein the plane runs orthogonal to the first swivel axis, - wherein the third swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein the fourth swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein swivelling of the further of the four rotating mirrors (2 to 5) and the remaining of the four rotating mirrors (2 to 5) diverts the light beam both in direction of the first swivel axis with regard to the plane and along the plane, and - wherein the swivelling of the one of the four rotating mirrors (2 to 5) and the other of the four rotating mirrors (2 to 5) diverts the light beam along the plane. - that, in one swivel position of the four rotating mirrors (2 to 5) about their four swivel axis (7 to 10), the light beam deviated by all four rotating mirrors (2 to 5) runs on the optical axis again, - wherein the plane runs orthogonal to the first swivel axis, - wherein the third swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein the fourth swivel axis runs at an acute angle of not more than 80° with regard to the optical axis, - wherein swivelling of the further of the four rotating mirrors (2 to 5) and the remaining of the four rotating mirrors (2 to 5) diverts the light beam both in direction of the first swivel axis with regard to the plane and along the plane, and - wherein the swivelling of the one of the four rotating mirrors (2 to 5) and the other of the four rotating mirrors (2 to 5) diverts the light beam along the plane.