发明名称 |
OPTICAL RECORDING MEDIUM AS WELL AS OPTICAL RECORDING AND REPRODUCTION METHOD |
摘要 |
An optical recording medium illuminated by light from a light source as near-field light using a focusing lens whose numerical aperture exceeds 1 to perform recording and/or reproduction is provided, wherein a composite layer in which a high refractive index material portion having a refractive index higher than that of a light-transmissible material portion is mixed in the light-transmissible material portion is provided on the surface of a light incident side of the optical recording medium. With an average refractive index of the composite layer being high, a numerical aperture controlled by a refractive index of a surface layer can be made large to obtain higher resolution and higher durability against contact with a lens or the like.
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申请公布号 |
US2006256695(A1) |
申请公布日期 |
2006.11.16 |
申请号 |
US20060382975 |
申请日期 |
2006.05.12 |
申请人 |
SAITO KIMIHIRO;YAMASAKI TAKESHI;NAKAOKI ARIYOSHI |
发明人 |
SAITO KIMIHIRO;YAMASAKI TAKESHI;NAKAOKI ARIYOSHI |
分类号 |
G11B7/135;G11B7/00 |
主分类号 |
G11B7/135 |
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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