发明名称 |
OPTICAL PICKUP APPARATUS, FOCAL-POINT ADJUSTING METHOD, AND OPTICAL DISC APPARATUS |
摘要 |
An optical pickup apparatus is provided with an angle adjusting element. The angle adjusting element changes a propagation direction of luminous fluxes of four luminous flux regions set about an optical axis of the laser light, out of laser light reflected by a disc, and mutually disperses the luminous fluxes. A signal light region in which signal light only is present appears on a detecting surface of a photodetector. A sensor pattern for signal light is placed at a position irradiated with the signal light within this region. A sensor pattern for a spherical aberration detection is placed on an inner side of this region.
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申请公布号 |
US2010027405(A1) |
申请公布日期 |
2010.02.04 |
申请号 |
US20090512440 |
申请日期 |
2009.07.30 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
NAGATOMI KENJI;HIBINO KATSUTOSHI;TAKAHASHI SEIICHIRO |
分类号 |
G11B7/135;G11B7/00 |
主分类号 |
G11B7/135 |
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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