A power supply connector is used to supply electric power from a hybrid vehicle equipped with an engine and a motor generator to a device outside of the vehicle. In solving means for the above, a rotor 1 in which thrust dynamic pressure generating grooves are formed in an end face, and a housing 2 which accommodates the rotor 1 in a hermetically sealed state with forming small gaps 3 and 4 therebetween are disposed. Furthermore, the present disclosure provides novel methods for synthesizing the above polymers and for conjugating to molecules such as targeting, diagnostic and therapeutic agents. The prisms may be provided with reflective andor anti-reflective coatings to further optimize diversion of radiation from the interface. According to the optical beam scanning apparatus and the image forming apparatus equipped with the optical beam scanning apparatus of the present invention, it is possible to adjust the curve and the inclination of the scanning line with ease and at high accuracy. The first member has a secondary retention system disposed therein.