发明名称 |
Optical Head Apparatus and Optical Information Apparatus |
摘要 |
An optical head apparatus is made to be downsized while obtaining an sufficient driving force of an objective lens actuator. The optical head apparatus includes a first optical system including a first objective lens for focusing a light beam upon an optical disc; a second optical system including a second objective lens for focusing a light beam upon an optical disc having an information recording density smaller than the optical disc which the first optical system irradiates upon, the second objective lens having a numerical aperture smaller than the first objective lens; and an up-orienting prism including a first reflecting surface for deflecting a light beam to an optical axis of the first objective lens in the first optical system, and a second reflecting surface for deflecting a light beam to an optical axis of the second objective lens in the second optical system.
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申请公布号 |
US2008163278(A1) |
申请公布日期 |
2008.07.03 |
申请号 |
US20050590968 |
申请日期 |
2005.04.18 |
申请人 |
WAKABAYASHI KANJI;KOMMA YOSHIAKI;TANAKA TOSHIYASU |
发明人 |
WAKABAYASHI KANJI;KOMMA YOSHIAKI;TANAKA TOSHIYASU |
分类号 |
G11B7/09;G11B7/08;G11B7/135 |
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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