发明名称 |
Optical pickup device |
摘要 |
The optical pickup device includes a light emitting unit for emitting a light beam focused on an optical disc having different track pitches; an optical unit for focusing the light beam emitted from the light emitting unit on the optical disc, dividing the light beam reflected from the optical disc into a plurality of diffractive light beams, and transmitting the diffractive light beams to the outside; and a light receiving unit for receiving the diffractive light beams from the optical unit to calculate a focusing error signal and a tracking error signal.
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申请公布号 |
US2005195705(A1) |
申请公布日期 |
2005.09.08 |
申请号 |
US20040910695 |
申请日期 |
2004.08.02 |
申请人 |
SHIN DONG-IK;HWANG WON-JAE;KYONG CHON-SU |
发明人 |
SHIN DONG-IK;HWANG WON-JAE;KYONG CHON-SU |
分类号 |
G11B7/09;G11B7/00;G11B7/135;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/09 |
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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