Abstract: An optical adjustment arrangement for a scanning system comprises a main part having defined thereon a triangle with a center point and first and second base points. An optical part is positioned onto the main part so that the center point is aligned with the optical axis of the optical part. The right and left sides of the optical part are adjusted separately and independently by first and second adjustment devices. The position of the adjustment devices coincides with the base points of the triangle. When one of the first and second adjustment devices is moved in a direction perpendicular to the plane defining the triangle, the main part with the optical part is rotated around the line connecting the other of the first and second base points with the center point. Stabilizing parts acting as flexible hinges are preferably provided around the main part.