A system and method for reducing rotor loads in a wind turbine that includes a brake and one or more rotor blades coupled to a rotor. The optical element includes a periodic structure having a period equal to or greater than the wavelength of the incident light. In some embodiments, the decompression shaft is formed from a first longitudinal portion and a second longitudinal portion. The output of the comparator controls the gate of both control switches such that the control switch in series with the sensed power supply unit is conducting while the other one is off. The recording head ejects ink droplets at the paper being conveyed to form an image.