发明名称 |
Optical pickup and drive apparatus |
摘要 |
An optical pickup includes a lens holder; an objective lens provided on the lens holder and having an effective region for collecting light from a light source and an edge located outer to the effective region; and a lens protector provided on the lens holder. The lens protector protrudes toward an optical disc more than the objective lens. The edge of the objective lens includes a convexed portion protruding toward the optical disc. An apex of the effective region of the objective lens protrudes toward the optical disc more than the convexed portion of the edge. A straight line connecting a part of the edge of the objective lens and a part of the lens protector is closer to the optical disc than the apex of the effective region of the objective lens.
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申请公布号 |
US8473972(B2) |
申请公布日期 |
2013.06.25 |
申请号 |
US201213418672 |
申请日期 |
2012.03.13 |
申请人 |
TERAHARA NORIAKI;HATANAKA SHINSUKE;TANAKA TOSHIYASU;OHTA TAKESHI;YAMASAKI FUMITOMO;PANASONIC CORPORATION |
发明人 |
TERAHARA NORIAKI;HATANAKA SHINSUKE;TANAKA TOSHIYASU;OHTA TAKESHI;YAMASAKI FUMITOMO |
分类号 |
G11B7/12 |
主分类号 |
G11B7/12 |
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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