A fuel nozzle with a ring of fuel spray orifices directing fuel jets at a fuel vortex generator having a fuel deflecting surface disposed downstream a distance from each fuel spray orifice. The resulting bead has improved thermal insulating properties and may be used for insulation. A restricted surface field of view along with an obstacle field of view can be used by the system to allow the view to traverse cavities and maintain a specified surface following distance from an obstacle, from a wall and from a floor. An optional coating source may be provided to fully or partially coat the image transfer belt before inking. 15, which comprises hydrolyzing lysozyme, preferably hen eggs lysozyme, to prepare a hydrolysate having a DH of between 5 and 45. Linear TIR lenses have a net deflection transverse to their focal strip.