| 发明名称 |
Optical recording and reproducing system. |
| 摘要 |
<p>An optical disc having recording film formed, which changes in beam reflectance or beam transmittance without accompanying geometrical deformation, due to the raised temperatures through the laser beam application, on a disc-shaped base (1) having geometrical rugged guide tracks (17) formed in advance.</p> |
| 申请公布号 |
EP0038499(A1) |
申请公布日期 |
1981.10.28 |
| 申请号 |
EP19810102786 |
申请日期 |
1981.04.11 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
AKAHIRA, NOBUO;NAGASHIMA, MICHIYOSHI;HARIGAE, SHUNJI;YOSHIDA, TOMIO;YAMASHITA, TADAOKI |
| 分类号 |
G11B7/00;G11B7/007;G11B7/24;G11B7/26;G11B7/30;(IPC1-7):11B7/24;41M5/24 |
主分类号 |
G11B7/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
