发明申请
- 专利标题： Optical disc, optical disc apparatus, and optical disc reproducing method
- 专利标题（中）： 光盘，光盘装置和光盘再现方法
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申请号： US11293366申请日： 2005-12-05
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公开(公告)号： US20060120259A1公开(公告)日： 2006-06-08
- 发明人: Toshihiro Sugaya , Hisashi Yamada
- 申请人： Toshihiro Sugaya , Hisashi Yamada
- 优先权： JP2004-352522 20041206
- 主分类号： G11B7/24
- IPC分类号： G11B7/24
摘要：
A single-sided dual layer optical disc of the invention comprises a first light transmission layer, a first recording layer which is accessed with a first laser beam, a second light transmission layer, and a second recording layer which is accessed with a second laser beam, these layers being arranged in that order from an incidence plane in the direction of incidence, the distance from the incidence plane to the second recording layer being 570 to 630 Am, and the areal recording density of the first recording layer being five times or more as high as that of the second recording layer.
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