发明名称 |
OBJECTIVE LENS FOR SCANNING OPTICAL DISKS (DVDS) |
摘要 |
An objective lens for scanning DVD and HD-DVD optical disks, comprising a first part and a second part, wherein said first part is shaped to comprise a first surface and an opposing second surface, said second part is shaped to comprise a third surface and an opposing fourth surface, said first surface is of a convex shape providing a main part of the lens power, said third surface is shaped to fit said first surface, and wherein said fourth surface is a generally aspherical surface, said second part being formed of synthetic resin material and said first part being formed of a material having a refractive index n1 having a value between 1.65 and 2, wherein the Abbe number V1 of the first part and the Abbe number V0 of the second part comply with the following relation (Formula I). |
申请公布号 |
WO03054591(A1) |
申请公布日期 |
2003.07.03 |
申请号 |
WO2002IB05317 |
申请日期 |
2002.12.09 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;HENDRIKS, BERNARDUS, H., W. |
发明人 |
HENDRIKS, BERNARDUS, H., W. |
分类号 |
G02B13/00;G02B3/02;G02B3/04;G02B13/18;G11B7/00;G11B7/125;G11B7/135 |
主分类号 |
G02B13/00 |
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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