A laser beam (bright central beam) impinges on a micro-fabricated wafer and generates the light field configuration required for laser cooling and trapping of atoms. A number of different rating configurations have been realised on a single 8” Si wafer. The picture shows a laser beam (bright central beam) impinging on a 2D grating generating four diffracted beams. In a pyramid shaped volume immediately above the wafer surface these beams overlap with the incoming one and generate the beams necessary for a magneto-optic trap. Adjacent to the illuminated grating on the wafer is one, that creates a similar beam pattern but from four individual 1D gratings (one in each of the quadrants of the sector). Below that is a similar one with three-fold symmetry.