发明名称 |
Verfahren und Vorrichtung zur Datenaufzeichnung und/oder -wiedergabe auf und/oder von optischen Platten, und Plattenkassetten für solche Platten |
摘要 |
An optical disk apparatus for recording and/or reproducing user data on to and/or from an optical disk (12) includes an optical head (11) with a semiconductor laser (13) for irradiating a laser beam having a wavelength of approximately 680 nm or less to the optical disk (12) and having a lens (17) with a numerical aperture (NA) of approximately 0.7 or more and a working distance of approximately 560 µm or less. By utilizing such apparatus, a relatively large amount of data may be recorded onto the optical disk (12). |
申请公布号 |
DE69836168(T2) |
申请公布日期 |
2007.09.06 |
申请号 |
DE1998636168T |
申请日期 |
1998.05.15 |
申请人 |
SONY CORP. |
发明人 |
OWA, HIDEO;KOBAYASHI, SHOEI;SENSYU, SUSUMU;KATSURAMOTO, SHINJI;WATANABE, TOSHIO;MORI, HIDENORI;YAMAMOTO, MASANOBU;SAITO, MASAKI |
分类号 |
G11B7/007;G11B7/013;G11B7/12;G11B7/135;G11B19/28;G11B20/00;G11B20/10;G11B23/033;G11B27/034;G11B27/036;G11B27/10;G11B27/19;G11B27/24;G11B27/30;G11B27/34;G11B27/36 |
主分类号 |
G11B7/007 |
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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