Optially variable surface pattern
AssigneeLandis & Gyr Betriebs AG
InventorGregor Antes
Life of this patent
Estimating the term…
Abstract
An article of manufacture including an optically variable surface pattern is disclosed. The optical surface pattern makes visible one out of a plurality of N image representations for each one out of N predetermined viewing directions. The surface pattern comprises M grating elements, each of the grating elements being divided into N grating element sub-portions. Each of the N sub-portions of each grating element contains a diffraction element in the form of a relief structure with predetermined parameters for diffracting incident light. Each of the sub-portions of each grating element thereby corresponds to one pixel of one of the N image representations, so that one of the N image representations is visible from each of said predetermined viewing directions.
Claims14
An article of manufacture including an optically varying surface pattern embossed into a support for making visible one out of a plurality of N image representations for each one out of N(N>1) predetermined viewing directions, said optically varying surface pattern comprising M(M>1) grid elements, each of said M grid elements being divided into N grid element sub-portions, each of said N grid element sub-portions of each of said M grid elements corresponding to a pixel of one of said N image representations and containing a diffraction element in the form of a relief structure with predetermined parameters for diffracting incident light, so that one of said N representations is visible from each one of said N predetermined viewing directions.
Dependencies are inferred from the claim text.