| 摘要 |
PURPOSE:To enable accurate readout of recorded information by forming recording layers each having a dot signal recorded in a region having metallic luster with a photographic silver salt emulsion on both sides of a light shielding supporting body having light absorbing surfaces on both sides. CONSTITUTION:Recording layers each having a digital signal or an analogue dot signal recorded in a region having metallic luster with a photographic silver salt emulsion are formed on both sides of a light shielding supporting body 11 having light absorbing surfaces on both sides. For example, under coat layers 12a, 12b, the recording layers 13a, 13b and protective layers 14a, 14b are formed on both sides of the supporting body 11 having light shielding and absorbing properties to obtain an optical information recording medium using the photographic silver salt emulsion as a recording medium and utilizing reflected light as a means to read out information. The recording medium ensures high readout accuracy. |
