| 摘要 |
Method of identifying a hologram. In this method, of the hologram to be identified, such as a rainbow hologram, various recording are made of the entire hologram or of predetermined parts. Said recordings take place at predetermined angles of observation and/or illumination which are different for each recording. Predetermined picture elements of said recordings are stored in a memory and are compared electrically with corresponding picture elements of recordings or a standard hologram obtained in a corresponding manner. The authenticity of the respective hologram investigated is determined on the basis of differences which have, or have not, been observed. |
