Interlayer Crosstalk Reduction by Controlling Backward Reflectivity in Multilayer Optical Discs
スポンサーリンク
概要
- 論文の詳細を見る
A method is proposed to reduce interlayer crosstalk in multilayer optical discs by controlling backward reflectivity of information layers, which can lead to wider tolerances of disc fabrication accuracy. Reduction of the backward reflectivity reduces the signal from the ghost spot even if thicknesses of spacer layers are equal. Experimental results showed that the ratio of the signals obtained by the readout spot and the ghost spot is less by about one order for a disc with controlled backward reflectivity than for a conventional disc. A rough estimate of the crosstalk caused by the ghost spot agrees qualitatively with the experimental results.
- 2008-05-25
著者
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Ushiyama Junko
Central Research Laoratory Hitachi Ltd.
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Shintani Toshimichi
Central Research Laboratory Hitachi Ltd.
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Kurokawa Takahiro
Central Research Laboratory. Hitachi Ltd.
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Miyamoto Harukazu
Central Research Laboratory Hitachi Ltd.
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Miyauchi Yasushi
R&D Division, Development & Technology Group, Hitachi Maxell Ltd., 6139-1 Ohnogo, Joso, Ibaraki 300-2595, Japan
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Miyauchi Yasushi
R&D Division, Development and Technology Group, Hitachi Maxell, Ltd., Joso, Ibaraki 300-2595, Japan
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Sugiyama Toshinori
R&D Division, Development and Technology Group, Hitachi Maxell, Ltd., Joso, Ibaraki 300-2595, Japan
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Sugiyama Toshinori
R&D Division, Development and Technology Group, Hitachi Maxell, Ltd., Joso, Ibaraki 300-2595, Japan
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Miyamoto Harukazu
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
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Shintani Toshimichi
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
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Ushiyama Junko
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Ushiyama Junko
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
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Kurokawa Takahiro
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Kurokawa Takahiro
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
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