发明名称 |
Optical pick-up device with a multifunctional prism |
摘要 |
The present invention provides an optical pickup device which enables cost reduction and has improved optical characteristics. In the optical pickup device according to the present invention, as a function to shape a light flux outputted from a semiconductor laser chip to a substantially circular beam and a function to separate reflected light from an optical recording medium from the source light are realized with one optical element, a number of required parts can be reduced, which in turn enables substantial cost reduction as well as size reduction of the device.
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申请公布号 |
US5488599(A) |
申请公布日期 |
1996.01.30 |
申请号 |
US19940191599 |
申请日期 |
1994.02.04 |
申请人 |
RICOH CO., LTD. |
发明人 |
AKIYAMA, HIROSHI;TAKAHASHI, YOSHITAKA |
分类号 |
G11B7/125;G11B7/135;(IPC1-7):G11B7/135 |
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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