发明名称 |
Optical head |
摘要 |
In an optical disc recording-reproducing apparatus using a standard optical disc enclosed in a cartridge, and optical plate for correcting various aberrations generated by a focusing lens is comprised therein in order to allow use of a double recording optical disc enclosed in the standard cartridge of the same size, the optical plate is placed in front of a focusing lens when the double recording optical disc is used, and is removed from the front of the focusing lens when the standard optical disc is used.
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申请公布号 |
USRE37185(E1) |
申请公布日期 |
2001.05.22 |
申请号 |
US19970891058 |
申请日期 |
1997.07.10 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SATOH ISAO;MIZUMO SADAO;ITOH NOBORU |
分类号 |
G11B7/00;G11B7/0045;G11B7/005;G11B7/09;G11B7/135;G11B7/24;G11B7/243;G11B19/12;(IPC1-7):G11B7/095 |
主分类号 |
G11B7/00 |
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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