发明授权
- 专利标题： Optical pickup apparatus for recording or reproducing information for an optical information recording medium and objective lens for optical pickup apparatus
- 专利标题（中）： 用于记录或再现用于光学拾取装置的光学信息记录介质和物镜的信息的光学拾取装置
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申请号： US12000783申请日： 2007-12-17
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公开(公告)号： US07639589B2公开(公告)日： 2009-12-29
- 发明人: Shinichiro Saito , Katsuya Sakamoto
- 申请人： Shinichiro Saito , Katsuya Sakamoto
- 申请人地址： JP Tokyo
- 专利权人： Konica Corporation
- 当前专利权人： Konica Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- 优先权： JP2000-326822 20001026; JP2000-365554 20001130; JP2001-086719 20010326
- 主分类号： G11B7/135
- IPC分类号： G11B7/135
摘要：
An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied: |δSA1/δU|·|δU|+|δSA2/δT|·|δT|≦0.07 λrms where λ represents a wavelength of a light source, δSA1/δU represents a change of a spherical aberration for an object-to-image distance change δU (|δU|≦0.5 mm) and δSA2/δT represents a change of spherical aberration for a temperature change δT (|δT|≦30° C.), the object-to-image distance is a distance between the light source (a light emitting point) and the information recording surface.
公开/授权文献
- US20080192612A1 Optical pickup apparatus and objective lens 公开/授权日：2008-08-14
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