Abstract: Aspects of the present disclosure describe systems, methods, and structures for aberration correction of optical phased arrays that employ a corrective optical path difference (OPD) in the near-field of an OPA to correct or cancel out aberrations in emitted beams of the OPA including those reaching far-field distances by generating a spatially-varying OPD across the aperture of the OPA that is substantially equal and opposite to an equivalent OPD of the aberration(s).

Abstract: The invention provides (FIG. 1) a floor support module for placing a cable between a floor (1) and a base (9) comprising a formation (FIG. 9) having a set of parallel cable ducts (10) each partitioned from neighboring ducts (20), each duct (10) being upwardly closed and, being provided at intervals along its length with a hollow upstanding projection (30) which provides access from floor (1) to duct (10). If desired segregated cables may be laid in ducts (20) or transverse ducts (10, 20) between projections (30). In preferred embodiments the formation supports a floor load upon load bearing surfaces (34) of upstanding projections (30).