| 摘要 |
An optical information recording/reproducing system comprises (A) a recording medium including a recording-bit producing layer, which is comprised of a fluorescent substance, and a photoconductive layer, both layers being interposed between conductive layers, at least one of which is transparent; (B) means for selectively applying a voltage to both sides of the recording medium; (C) means for radiating an optical recording beam to a site on the recording medium while applying a voltage to the recording medium and, then, applying a high electric field to the recording-bit producing layer by way of the photoconductive layer, the resistance of the recording-bit producing layer being lowered at the site, thereby developing a dielectric breakdown and, hence, causing the fluorescent substance to lose the fluorescence, so that information is recorded; and (D) means for radiating an optical reproducing beam on the recording medium without applying any voltage to the recording medium and, then, reproducing information depending on whether fluorescence has been produced. The system is characterized by an improved S/N ratio upon reproduction and an increment to the storage capacity.
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