A device for homogenizing light has at least two cylindrical lens arrays which are placed one behind the other in a direction of diffusion of the light to be homogenized and which each have convex and concave cylindrical lenses disposed next to one another in an alternating manner, the cylinder axes of these cylindrical lenses are aligned parallel to one another. In an exemplary embodiment, the array includes an upper conductive plate structure comprising a set of continuous transverse stubs, and a lower conductive plate structure disposed in a spaced relationship relative to the upper plate structure. The present invention allows the camera lens to acquire a built-in drive source, eliminates the runout that occurs during the drive of telescopic lens, and simplifies the assembly process. Based on the compared values, the turn-off time of the power feed semiconductor switch is controlled so that the rotational speed of the rotor may reach the target rotational speed fast and smoothly. Tire inflation pressure may be adjusted based on a target tire pressure that may vary with vehicle load.