The invention relates to an optical scanning device for scanning an information carrier, such as a CD or DVD. The polymeric material includes a material having a first temperature-responsive stiffness, and the structural element includes an element fabricated from a shape memory alloy formulated to have a second temperature-responsive stiffness that is converse to the first temperature-responsive stiffness. The same image used to calculate the scale relationship is also processed, such as inspected, for example. The control device controls the generation device thereby to control the cleaning voltage. The component is characterized in that, firstly the first tube has a depolluting component, and the second tube has a silencer. The system and method includes a plurality of macro base stations, open-access femto base stations and femto base stations with different subscriber groups.