发明名称 |
Optical pickup device with a plurality of laser couplers |
摘要 |
An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC1 and LC2 that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC1 and LC2 are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device. <IMAGE> |
申请公布号 |
EP1293973(A3) |
申请公布日期 |
2004.10.13 |
申请号 |
EP20020025650 |
申请日期 |
1997.05.22 |
申请人 |
SONY CORPORATION |
发明人 |
TANIGUCHI, TADASHI;KOJIMA, CHIAKI |
分类号 |
G11B7/00;G11B7/12;G11B7/125;G11B7/13;G11B7/135;G11B11/105 |
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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