发明申请
- 专利标题: MULTILAYERED OPTICAL DISK AND ITS RECORDING METHOD
- 专利标题(中): 多层光盘及其记录方法
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申请号: US12570106申请日: 2009-09-30
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公开(公告)号: US20100309764A1公开(公告)日: 2010-12-09
- 发明人: Harukazu MIYAMOTO , Koichi Watanabe , Yutaka Nagai , Koichiro Nishimura , Takakiyo Yasukawa
- 申请人: Harukazu MIYAMOTO , Koichi Watanabe , Yutaka Nagai , Koichiro Nishimura , Takakiyo Yasukawa
- 优先权: JP2009-136548 20090605; JP2009-159535 20090706
- 主分类号: G11B7/00
- IPC分类号: G11B7/00 ; G11B3/74 ; G11B20/18
摘要:
To provide a recording method of a multilayered optical disk having three or more recording layers, for performing recording while securing sufficient test areas without reducing user data areas, and while suitably controlling the power of laser beam irradiated onto each of the layers. The method uses an optical disk which has at least a first recording layer and a second recording layer located on the side nearer to the light incident surface than the first recording layer, and which respectively has a first test area configured by a plurality of segments in the first recording layer and a second test area configured by a plurality of segments in the second recording layer. Further, the method is configured such that there is defined beforehand a predetermined radial distance L corresponding to relative precision of radial positions between the plurality of layers and the optical spot diameter, and that when an arbitrary segment in the second test area is test-recorded, a segment in the first test area, the radial distance of which from the recorded test area in the second test area is within the range of the predetermined radial distance L, is set as a segment in which the test recording is not performed. Thereby, even in the case where the radial positions of the test areas of the plurality of layers are substantially overlapped with each other, it is possible to precisely perform the learning of optical power. For this reason, it is possible to use and arrange the test areas of the plurality of layers without waste. Further, the learning of recording power can be performed without receiving the influence of the recorded state of the other layers, so that the accuracy of the learning of recording power can be improved. Thereby, it is possible to improve the quality of recording and the reliability of recorded data.
公开/授权文献
- US09286929B2 Multilayered optical disk and its recording method 公开/授权日:2016-03-15
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