发明名称 |
Method and device for initializing optical recording medium of phase change type, and optical recording medium |
摘要 |
A device for initializing an optical recording medium includes a semiconductor laser diode, and an optical system which projects a laser beam emitted from the semiconductor laser diode onto the optical recording medium. A half-value width of a spot of the laser beam focused on the optical recording medium is equal to 1/2 to 1/6 times a half-value width of a near-field pattern of the semiconductor laser diode in a direction parallel to a junction interface of the semiconductor laser diode, so that the optical recording medium can be evenly initialized by the laser beam. <IMAGE> |
申请公布号 |
EP1369848(A3) |
申请公布日期 |
2004.03.24 |
申请号 |
EP20030018765 |
申请日期 |
1997.03.26 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
HARIGAYA, MAKOTO;KINOSHITA, MIKIO;KAGEYAMA, YOSHIYUKI |
分类号 |
G11B7/00;G11B7/004;G11B7/0055;G11B7/125;G11B7/135;G11B7/24;G11B7/26 |
主分类号 |
G11B7/00 |
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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