发明名称 |
SCANNING-EINRICHTUNG MIT EINEM TEILWEISE AUS KUNSTSTOFF BESTEHENDEN OBJEKTIVSYSTEM MIT HOHER NA |
摘要 |
An optical scanning device for scanning an information layer ( 104 ) of an optical record carrier ( 102 ) includes a radiation source ( 110 ) for generating a radiation beam ( 108 ) and a high-NA objective system ( 118 ) for converging the radiation beam on the information layer. The objective system includes a first lens ( 116 ) and a second lens ( 117 ). The first lens includes a glass body and the second lens is made of plastic. The signs of the temperature-dependences of the spherical aberration of the first and second lens are different, thereby reducing the temperature-dependence of the spherical aberration of the objective system as a whole. |
申请公布号 |
DE60213967(D1) |
申请公布日期 |
2006.09.28 |
申请号 |
DE2002613967 |
申请日期 |
2002.04.25 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
HENDRIKS, BERNARDUS |
分类号 |
G02B13/00;G02B9/04;G02B13/18;G02B13/24;G11B7/135;G11B7/1378;G11B7/22 |
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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