PRODUCT SURFACE INCLUDING AN OPTOELECTRONICALLY READABLE CODE

摘要

A product surface including a first optoelectronically readable code formed by an arrangement of planar cells of a first and a second cell type. The code has a large detectable region and the readability thereof is robust in relation to demands during the production and/or the use of the surface. The cells, as integral components of the surface, have a surface profile. An intensity difference ΔI=I2−I1 in the intensity I2 reflected by the surface profile of the second cell type and intensity I1 reflected by the surface profile of the first cell type results in the case of light incidence as a result of the configuration of the surface profiles. The surface has a second code. The maximum of the absolute intensity difference |ΔI1| of the first code lies in a different reflection direction than the maximum of the absolute intensity difference |ΔI2| of the second code.

主权项

1. A product surface comprising:
a first optoelectronically readable code formed by a plurality of first planar cells of a first cell type and a plurality of second planar cells of a second cell type; said first and second planar cells being integral components of the product surface; said first planar cells having a first surface profile; said second planar cells having a second surface profile; at least one of said first and said second surface profiles having at least one of a depression and an elevation with respect to the product surface; said first surface profile of said first cell type being configured relative to said second surface profile of said second cell type such that said first surface profile has first reflection properties configured to reflect at a first reflection intensity I1 when light is incident and said second surface profile has second reflection properties configured to reflect at a second reflection intensity I2 when light is incident; said second reflection properties differing from said first reflection properties such that a first intensity difference ΔI1=I2−I1 results when light is incident; a second optoelectronically readable code formed by a plurality of third planar cells of a third cell type and a plurality of fourth planar cells of a fourth cell type; said third and fourth planar cells being integral components of the product surface; said third planar cells having a third surface profile; said fourth planar cells having a fourth surface profile; at least one of said third and said fourth surface profiles having at least one of a depression and an elevation with respect to the product surface; said third surface profile of said third cell type being configured relative to said fourth surface profile of said fourth cell type such that said third surface profile has third reflection properties configured to reflect at a third reflection intensity I1 when light is incident and said fourth surface profile has fourth reflection properties configured to reflect at a fourth reflection intensity I4 when light is incident; said fourth reflection properties differing from said third reflection properties such that a second intensity difference ΔI2=I4−I3 results when light is incident; said first and second surface profiles of said first optoelectronically readable code defining a first maximum absolute intensity difference |ΔI1|; said third and said fourth surface profiles of said second optoelectronically readable code defining a second maximum absolute intensity difference |ΔI2|; and, said first maximum absolute intensity difference |ΔI2| lying in a different direction of reflection than said second maximum absolute intensity difference |ΔI2|.