Abstract: A dry gas seal system for rotating equipment operating on a process fluid. The system includes: a dry gas seal for sealing rotating equipment; an axial end face separation seal comprising a primary ring, a mating ring, a sleeve for coupling the mating ring to the shaft of the rotating equipment, and a retainer for the primary ring; and an oleophobic coating disposed at least partially over each of the following surfaces of the separation seal: at an outer peripheral edge of the primary ring distal to, and facing away from, the shaft of the rotating equipment; at an outer peripheral edge of the mating ring distal to, and facing away from, the shaft of the rotating equipment; and both surfaces of the mating ring and primary ring which interface with each other.

Abstract: A scanning device for use in an endoscope or other applications can be driven to scan a region with one or more different scanning parameters during successive scanning frames. The scanning device, which can include an optical fiber or reflective surface driven by an actuator to move relative to one or more axes, can be provided with a drive signal that is different during successive scanning frames so that the scanning pattern can be caused to differ between the successive scanning frames by one or more of size, amplitude in at least one direction, depth, duration, shape, and resolution. Thus, different scanning frames can be employed for imaging, carrying out a diagnosis, rendering a therapy, and/or monitoring a site, using the appropriate scanning pattern, appropriate light source, and other parameters for each function that is carried out by the scanning device.

Abstract: A scanning device for use in an endoscope or other applications can be driven to scan a region with one or more different scanning parameters during successive scanning frames. The scanning device, which can include an optical fiber or reflective surface driven by an actuator to move relative to one or more axes, can be provided with a drive signal that is different during successive scanning frames so that the scanning pattern can be caused to differ between the successive scanning frames by one or more of size, amplitude in at least one direction, depth, duration, shape, and resolution. Thus, different scanning frames can be employed for imaging, carrying out a diagnosis, rendering a therapy, and/or monitoring a site, using the appropriate scanning pattern, appropriate light source, and other parameters for each function that is carried out by the scanning device.