发明名称 |
Optical scanning device |
摘要 |
The present invention provides a scanning device with the following features: the system is capable of writing data to record carriers of a first format because it is corrected for chromatic aberration resulting from fast wavelength variations during write operation; it has a diffractive element with a generally sawtooth-like pattern, such that it may for example be manufactured in a single-step replication process; the system has high efficiency for scanning first optical record carriers (e.g. DVDs) and acceptable efficiency for scanning second optical record carriers (e.g. CDs); and the lens provides limited spherochromatism and the system is thus able to cope with wavelength variations.
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申请公布号 |
US2003169498(A1) |
申请公布日期 |
2003.09.11 |
申请号 |
US20020169926 |
申请日期 |
2002.07.10 |
申请人 |
HENDRIKS BERNARDUS HENDRIKUS WILHELMUS;WALS JEROEN |
发明人 |
HENDRIKS BERNARDUS HENDRIKUS WILHELMUS;WALS JEROEN |
分类号 |
G02B13/00;G11B7/00;G11B7/135;G11B7/24;(IPC1-7):G02B5/18;G02B27/44 |
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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