发明名称 |
Optical recording medium and optical recording method |
摘要 |
An optical recording medium (10) is adapted such that information is recorded by forming recording marks on a recording layer (12) that covers grooves (16) of an optical transparent substrate (14). In the recording layer (16), contiguously defined along a feed direction S of irradiation are virtual recording cells (40) which have a given unit length in the feed direction S of irradiation along the groove 16 and a given unit width in the direction orthogonal thereto. In addition, the groove width W is set so that 0.20x(lambd/NA)<W<0.50x(lambd/NA), where lambd is the wavelength of a laser beam to be irradiated with and NA is the numerical aperture of the objective lens for the laser beam in a irradiation optical system. The irradiation time is set in five stages or more to radiate the laser beam, thereby making it possible to record information in multi-levels.
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申请公布号 |
US2002192423(A1) |
申请公布日期 |
2002.12.19 |
申请号 |
US20020107039 |
申请日期 |
2002.03.28 |
申请人 |
ARIOKA HIROYUKI;TSUKAMOTO SYUJI;HORAI TAKASHI;OOTSUKI SHIROU |
发明人 |
ARIOKA HIROYUKI;TSUKAMOTO SYUJI;HORAI TAKASHI;OOTSUKI SHIROU |
分类号 |
G11B7/0045;G11B7/007;G11B7/013;G11B7/125;G11B7/244;G11B7/248;G11B7/258;(IPC1-7):B32B3/02 |
主分类号 |
G11B7/0045 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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