| 摘要 |
PROBLEM TO BE SOLVED: To provide optical recording media (optical card, CGH card, prepaid card, ID card, and credit card) 4a and 5a having enhanced security with a simple constitution without much influencing its outward appearance design and readers for optical recording medium information (a reader and a reader device) 2a and 5g. SOLUTION: Hologram patterns (pictures CGH(Computer Generated Hologram)) 4e and 5e on which a pattern (a figure (B) 'ABC') is recorded for proving the authenticity of optical recording media 4a and 5a are arranged so as to be made adjacent to recording information reproduction holograms (information CGH) 4b, 4c, 5b, and 5c or tracking signal reproduction holograms (control CGH) 4d and 5d, and reading scanning is continuously performed by a laser beam. |
