| 摘要 |
PURPOSE: To provide a data medium containing the plane elements(OVD) having the optical variable effects dependent on the visual angles of a hologram, etc., such as ID cards, the securities, etc., in particular, and also a series of data media or a single data medium which can be individually identified, and also to provide a method to produce such data media. CONSTITUTION: The additional information 5 are prepared between an OVD 3 and the surface of a data medium 1 in the form of symbols, graphics, etc., which are built later into the OVD 3, overlap the optically variable effect of the OVD 3 and can be visually recognized in the same way at least in a prescribed area of the OVD 3. |
