发明名称 |
Objective optical system and optical pickup apparatus |
摘要 |
An objective optical system according to the present invention is provided for use in an optical pickup apparatus for recording or reproducing information on an information recording surface of a first optical information recording medium using a first light flux emitted from a first light source. The objective optical system is provided with: a first lens with a positive refractive power including plastic; a second lens with a positive refractive power including plastic; and a first phase structure. A wavefront aberration change amount of the objective optical system when a wavelength of the first light flux changes, and a wavefront aberration change amount of the objective optical system when an ambient temperature of the objective optical system satisfy the predefined condition.
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申请公布号 |
US7688701(B2) |
申请公布日期 |
2010.03.30 |
申请号 |
US20060453994 |
申请日期 |
2006.06.16 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
NOGUCHI KAZUTAKA;ATARASHI YUICHI |
分类号 |
G11B7/00;G11B7/125;G11B7/135 |
主分类号 |
G11B7/00 |
代理机构 |
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