A Raman imaging and sensing apparatus is described. The blade may include a substantially flat base; a sloped wall coupled to and extending at an angle from the base; and a cutter edge coupled to the sloped wall. A processor receives captured images from the camera. The control unit counts the number of broadcast packets that reach each of the network terminals, that is, broadcast packets input to each port of the switching hub. The one or more shutters are movable between an open position where the wafer holder can pass through the passageway and an obstructing position which defines a passageway which is smaller than the passageway defined when the shutter is in the open position. The cathode electrode active material includes particles having a core-shell structure with a sulfur-containing active material core, a conductor coating disposed on a surface of the active material core, and a binder coating disposed on the conductor coating.