| 摘要 |
PROBLEM TO BE SOLVED: To make difficult alteration of recording data and make easier finding of data in order to control such alteration and thereby guarantee the reliability of data by providing a diffraction lattice structure displaying means for reprogrammably recording the information expressed by diffraction grating on a supporting material and a different magnetic recording means and/or IC recording means. SOLUTION: On a supporting material 2 of a recording medium 1, a magnetic recording carrier 3 and a refraction lattice structure displaying means 4 which can reprogrammably record data with a magnetic recording means 6 and hologram recording means 8 are provided. When a hologram pattern of the same data as the magnetic recording carrier 3 is recorded on the refraction lattice structure displaying means 4, if data is altered on the magnetic recording carrier 3, it does not match the hologram recording. Therefore, alteration of data held by the magnetic recording carrier 3 supporting material 2 can be found easily by a magnetic recording means 7 and a hologram reproducing means 9. Accordingly, alternation of data is made difficult and prevented to improve reliability. |
