发明名称 |
Objective lens unit, optical pickup, and optical information apparatus |
摘要 |
An objective lens unit according to the present invention includes a first objective lens 41; and a first lens holder 2 for supporting the first objective lens 41. The first lens holder 2 is formed of a material which transmits ultraviolet. Preferably, the first lens holder 2 includes a through-hole, having first and second openings 2a and 2b, through which light incident on the first objective lens 41 passes, and an opening limiting section 3 provided along a circumferential direction of the through-hole and projecting toward a central axis of the through-hole. The first objective lens 41 is supported so as to block the first opening 2b. The opening limiting section 3 guides light incident thereon from the second opening 2a in a direction away from an optical axis of the first objective lens. |
申请公布号 |
US8614938(B2) |
申请公布日期 |
2013.12.24 |
申请号 |
US201113014045 |
申请日期 |
2011.01.26 |
申请人 |
KOMMA YOSHIAKI;WAKABAYASHI KANJI;SANO KOUSEI;TANAKA TOSHIYASU;MATSUZAKI KEIICHI;WADA HIDENORI;PANASONIC CORPORATION |
发明人 |
KOMMA YOSHIAKI;WAKABAYASHI KANJI;SANO KOUSEI;TANAKA TOSHIYASU;MATSUZAKI KEIICHI;WADA HIDENORI |
分类号 |
G11B7/135 |
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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