发明名称 |
Optical head apparatus. |
摘要 |
<p>In an optical head apparatus, a minute light beam spot is formed on a recording medium by a focusing lens. The focusing lens focuses light radiated from a light source to provide the minute light beam spot. Between the light source and the focusing lens, a light intensity or phase distribution converter is provided, so that the minute light beam spot will be a super resoluved light beam spot. <IMAGE></p> |
申请公布号 |
EP0646911(A2) |
申请公布日期 |
1995.04.05 |
申请号 |
EP19940120116 |
申请日期 |
1989.06.13 |
申请人 |
NEC CORPORATION |
发明人 |
YUTAKA, HIROSE, C/O NEC CORPORATION;YUTAKA, YAMANAKA, C/O NEC CORPORATION |
分类号 |
G11B7/125;G11B7/00;G11B7/005;G11B7/12;G11B7/135;(IPC1-7):G11B7/125;G11B7/13 |
主分类号 |
G11B7/125 |
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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