Patent ID: 8741550

Claim:
A process for applying an optically active focusing structuring to a substrate, comprising structuring using photolithographic masks, wherein a central circular shaped uncovered region is surrounded by concentric ring area shaped uncovered regions, and wherein the structuring has a height of about 0.1 μm up to 10 mm, characterized by a number of repetitions of the steps of coating the substrate with a photosensitive resist layer while stepwise decreasing the width of a first layer structure to a top layer structure, wherein the step of coating the substrate is carried out by at least one of spin coating, spraying, and electrodeposition, photolithographic structuring of the applied layer, coating the pre-structured substrate with an optically active layer which comprises glass, by PVD (physical vapor deposition), wherein at least two glasses comprising different optical properties are used for the layer to enable the correction of the chromatic aberration, and lifting off the resist layer, wherein the step of lifting off the resist layer is carried out in such a manner that at least one layer that has been applied to the resist layer is also lifted off.