发明申请
- 专利标题： MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD
- 专利标题（中）： 光学记录介质，光学记录介质，光学信息设备和信息再现方法的制造方法
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申请号： US13461094申请日： 2012-05-01
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公开(公告)号： US20120213045A1公开(公告)日： 2012-08-23
- 发明人: Yoshiaki KOMMA , Joji ANZAI , Masahiko TSUKUDA , Yasumori HINO
- 申请人： Yoshiaki KOMMA , Joji ANZAI , Masahiko TSUKUDA , Yasumori HINO
- 优先权： JP2009-193593 20090824
- 主分类号： G11B7/085
- IPC分类号： G11B7/085 ; G06F19/00
摘要：
Shape-wise thicknesses of a cover layer and first through (N−1)th intermediate layers of an optical recording medium having refractive indexes nr1, nr2 are converted into thicknesses t1, t2 of the respective layers having a predetermined refractive index which makes a divergent amount equal to a divergent amount of a light beam resulting from the thicknesses tr1, tr2, a difference DFF between the sum of a thickness “ti” through a thickness “tj”, and the sum of a thickness “tk” through a thickness “tm” is set to 1 μm or more (where i, j, k, and m are each any positive integer satisfying i≦j
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