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.
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
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