| http://www.w3.org/ns/prov#value | - The interlayer interference light may be reflected from the layer other than the target reproducing/recording layer, As another aspect, the blocking region 75 may not block the other portion of the interlayer interference light, and in order to avoid being affected by the other portion of the interlayer interference light which has not being blocked, the first light-receiving part 43 and the secon
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