发明名称 |
Optical head device, inclination detection apparatus using the same, and optical information processing apparatus using the same |
摘要 |
An inclination detection apparatus is provided which includes an optical system for collecting a beam emitted by a light source onto an information memory medium. The inclination detection apparatus further includes a light detector for generating a detection signal in accordance with a light amount of the beam reflected by the information memory medium, the light detector including a first light receiving section and a second light receiving section. In addition, the inclination detection apparatus includes a signal processing section for processing the detection signal. The signal processing section generates an inclination detection signal based on a difference between a first sum signal and a second sum signal, the first sum signal being based on a sum of a first light receiving section signal and a second light receiving section signal, the second sum signal being based on a sum of a third light receiving section signal and a fourth light receiving section signal. Moreover, the signal processing section generates a tracking error signal based on a difference between a fifth light receiving section signal and a sixth light receiving section signal.
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申请公布号 |
US6314068(B1) |
申请公布日期 |
2001.11.06 |
申请号 |
US20000640769 |
申请日期 |
2000.08.17 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SANO KOUSEI;KADOWAKI SHIN-ICHI;YAMAMOTO HIROAKI;KASAZUMI KEN'ICHI;NISHINO SEIJI |
分类号 |
G11B7/09;G11B7/095;G11B7/13;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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