| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical memory disk in which many information is recorded in one pit space of a conventional optical disk or a card and to provide the associated reading device and the writing system. SOLUTION: Minute pattern columns such as thin rectangular shapes and circular shape are formed along a track 2 of an optical disk. When these patterns are irradiated by a laser beam, holographic patterns specific to the pattern are made on an optical detecting element array. Then, recorded information is read and written by an optical memory plate 10 on which pattern recognition is conducted and the associated reading device and the writing system which make a pattern 3 correspond to respective numerals and characters. |
