An optical scanning apparatus and an image forming apparatus using the same, overcoming spot rotation due to scanning line curvature and wavefront aberration deterioration, including an incident optical system for guiding beam emitted from a light source to a deflector, and an imaging optical system for forming image of the beam deflected by the deflector on a scanning surface. An expansion spacer extends through a sleeve. The rotary electric machine also includes a control unit, with the control unit including at least one electronic control electrically connected to the at least one stator winding. The communication master may also be embodied as an IED that is configured to coordinate the actions of other IEDs. Once calls are initiated by the outdial server, the routine again checks if any agents are available. A solid matter dosing head, provided as a tool, is automatically attached in a removable manner to the tool holder by means of a permanent magnet.