| abstract |
The invention relates to a refractive beam shaper. Such a beam shaper comprises at least one meniscus lens (1). The at least one meniscus lens (1) has a concavely curved surface (2) for the entry or exit of a light beam and a convexly curved surface (3) for the exit or entry of the light beam. Both surfaces have such curvatures that a collimated, parallel to an optical axis (4) of the at least one meniscus lens (1) in this entering light beam emerges with a relation to the incoming light beam diameter changed again as a collimated light beam. In this case, at least one of the two surfaces (2, 3) to avoid aberrations on a given aspherical shape. |