发明名称 |
Optical head and method of making the same |
摘要 |
An optical head includes a lens holder for carrying a biconvex lens and a plano-convex lens above a data storage disk. In data-writing or data-reading operation, the plano-convex lens comes closer to the storage disk than the biconvex lens. The plano-convex lens is accommodated in a through-hole formed in the lens holder. The lower opening of the through-hole is closed by a transparent plate attached to the bottom surface of the lens holder. The flat lens surface of the plano-convex lens is held in close contact with the transparent plate.
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申请公布号 |
US6717905(B2) |
申请公布日期 |
2004.04.06 |
申请号 |
US20020058720 |
申请日期 |
2002.01.28 |
申请人 |
FUJITSU LIMITED |
发明人 |
KANTO NOBUYUKI;KAWASAKI GORO |
分类号 |
G11B7/125;G11B7/135;G11B7/22;G11B11/105;(IPC1-7):G11B7/00 |
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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