| 摘要 |
PROBLEM TO BE SOLVED: To provide an information recording/reproducing system in which mechanical driving is not necessary and high density recording is possible. SOLUTION: In the information recording device 3, a recorded medium 6 is produced by applying phosphors varying in fluorescence lifetime according to the levels of the recording information to a square substrate. In the information reproducing device 5, the lighting pulses shorter than the fluorescence lifetime of the phosphors are illuminated all at once in compliance with each recording position of the recorded medium 6 at a light source part 50 and a lighting array part 60. The information recording section 70 detects with an ICCD 70 all at once the phosphors emitted from each recording position of the recorded medium 6 by the illumination of each time, and reproduce the recording information of each recording position based on the fluororescence lifetime shown by the detection information of the phosphors. Since the information of a plurality of bits can be recorded in one recording position, a high recording density can be realized in bit conversion. If the recording pitch is set identical to the pixel pitch of the reproduction side, the need for mechanical driving sections is eliminated in both phases of the illumination and the detection and, therefore, the mechanism of information reproduction of a high direction access speed can be provided. COPYRIGHT: (C)2009,JPO&INPIT
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