Optical information carrier made of composite laminate with carrier foil

摘要

The carrier is in the form of a composite laminate (2) with a carrier foil (3) with microscopically fine relief structures. The foil is light transparent in predetermined spectral range. Microscopically fine relief structures (10) are formed on underside of foil, which is coated with a base layer (8). - The base layer has a refractive index differing from the index of the foil in a part of the electromagnetic spectrum so that the relief structures on the underside partially reflect and diffract the light (11) which has penetrated into the laminate. The top side of the foil has optically effective structures (7) allowing light impinging on the tp side to penetrate into the laminate. The thickness of the foil is 20 micrometres.