The integration of micro-optical elements on a semiconductor substrate, particularly elements, such as glass-material optical components, such as lenses, beam splitters, mirrors and polarizing elements. Down-sampling is employed to constrain the floating-tap positions rather than positions occurring with 1T resolution or spacing. The opening 28 is sized to accommodate blades of a fan. This vacuum operates to deploy a trash bag against the inside wall of the liner, either when the container is open or when a perforated lid is fitted over the container to close the liner. The first and second axis are orthogonal and the first and second pairs of diametrically opposed probes are configured to generate a sum beam and difference beam in the at least one of the plurality of concentric waveguides.