Barcode imagers (also known as digital or area imagers) read both 1D and 2D barcodes using sensors that have rows of cells. They’re proliferating with 2D barcodes that embed more information ...

Figure 1: A 1D array of degenerate cavities for simulating a 2D rectangular lattice in a magnetic field. Figure 2: Design of the auxiliary and coupling cavity for simulating with polarized photons.