发明名称 |
Method of forming an image on an optical disk by radially vibrating a laser beam under focus control |
摘要 |
An optical disc recording apparatus can draw an image by radially vibrating a laser beam under stable focus control. A pickup radiates the laser beam onto the optical disc rotated by a spindle motor. A focus servo controller maintains a constant spot diameter of the laser beam on the optical disc by detecting a return light of the laser beam reflected back from the optical disc. An irradiation position controller operates when the pickup opposes a label face of the optical disc for controlling an irradiation trajectory of the laser beam to vibrate in a radial direction of the optical disc while the laser beam runs along circumferential zones defined on a coloring layer of the label face. A modulating section modulates an intensity of the laser beam for forming dots along the circumferential zones so as to draw the image. <IMAGE>
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申请公布号 |
EP1367570(A2) |
申请公布日期 |
2003.12.03 |
申请号 |
EP20030012367 |
申请日期 |
2003.05.30 |
申请人 |
YAMAHA CORPORATION |
发明人 |
MORISHIMA, MORITO |
分类号 |
G11B7/24;G11B7/0037;G11B7/0045;G11B7/08;G11B7/09;G11B23/40;(IPC1-7):G11B23/40 |
主分类号 |
G11B7/24 |
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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