Patent ID: 8320046

Claim:
Optical device for providing a synthetic integral image, comprising a polymer foil stack; said polymer foil stack comprising at least one polymer foil; a first interface of said polymer foil stack comprising optically distinguishable image data bearer structures; said image data bearer structures being embossed or printed structures; said first interface having a general shape defined by a first array composed of curved interface portions, on which said image data bearer structures are superimposed; a second interface of said polymer foil stack having a second array composed of microlenses; said second interface being provided at a distance from said first interface, said distance being close to a focal length of said microlenses; said second array being in registry with said first array; each of said curved interface portions corresponding to a total image optimum appearance plane of a respective microlens; said second array having a periodicity of less than 200 micrometers; an offset in lateral position of the curved interface portions with respect to said respective microlenses is smaller than 20% of a base diameter of a curved interface portion.