Abstract: A towed array deployment system is provided that uses the flow of fluid through the interior of a tube to deploy a towed line array. The system includes a small surface water craft such as an unmanned surface vehicle having a length between seven and eleven meters and a U-shaped tube mounted to the outside of the hull of the watercraft below the waterline. A towed array is fed from a winch aboard the surface craft, through one end of the tube, and the fluid is introduced through into the interior of the tube to force the towed array for deployment through the tube and out a second end of the tube near the stern of the watercraft.

Abstract: A ridge-waveguide filter with a signal input port at a first end and a signal output port at a second end contains a cascade assembly of metal-bounded ridge-waveguide sections with interspersed metal-bounded evanescent-mode coupling regions, and also contains low-loss ridge-waveguide port coupling networks to impedance-match the ends of the assembly to respective signal-port reference impedances. A frequency multiplexer with a composite-signal port and a plurality of channeled-signal ports is composed of a plurality of ridge-waveguide filters that are series-connected through a ridge-waveguide manifold containing a multiplicity of three-way waveguide junctions and quasi-lumped waveguide elements.

Abstract: A method is provided for the generation an image in a turbid medium. After illuminating locations along a each of three adjacent lines using beam(s) of light, a camera is activated to generate three separate images. The second line is between the first and third lines. In terms of amplitude associated therewith, a portion of each of the first image and third image are subtracted from the entirety of the second image to generate a resulting image.

Abstract: A three dimensional display system comprises a display volume selectively partitioned into distinct display regions, a display surface for scattering light beams from the display volume, at least two optical scanners for modulating the light beams and for directing the light beams to the display surface within each distinct display region respectively, and a display controller. The display controller comprises a world coordinate interface for inputting world coordinates, a data processor for transforming the world coordinates into view coordinates and device coordinates, and an optical scanner controller for sensing and controlling the motion of the display surface and for outputting the device coordinates to the optical scanners to generate a three dimensional image within the display volume.