Diffraction of transmission light through triangular apertures in array of retro-reflective micro-prisms
arXiv:1203.3697 · doi:10.1364/AO.51.003403
Abstract
The array of micro-prisms was described by model of multi-period blazed gratings consisting of triangular apertures. The origins of hexagram-shaped diffraction patterns were interpreted based on multiple-beam interference and diffraction array theorem. The relation between zonal /line ghost fringes and imperfectly fabricated array structures was analyzed. Geometrical performances (e.g., the dihedral angle of micro-prism) were tested by measuring the features of diffraction patterns of samples from three retro-reflective sheeting manufacturers.
arXiv commentApplied Optics(in press), 17 pages, 9 figures