发明名称 |
OPTICAL RECORDING AND REPRODUCING SYSTEM |
摘要 |
An optical recording and reproducing disc for recording and/or reproducing information by the application of laser beams having a wavelength lambda in the range of 0.7 to 1.0 mu m, the disc being constituted by a disc-shaped base having at least one spiral guide track thereon with top surfaces parallel to the surface of the base at a height above the base different from the top surfaces of the portions of the base between the spires of the track, which height is in the range of lambda /12 to lambda /6, the guide track having a width approximately equal to the effective diameter of the laser beams; and a uniform thickness coating of a light recording material on the top surface of the guide track and the portions of the base between the spires of the guide track, the light recording material being a material the transmittance and/or the reflectance of which is varied by irradiation by the laser beams. |
申请公布号 |
DE3176435(D1) |
申请公布日期 |
1987.10.15 |
申请号 |
DE19813176435 |
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):G11B7/24;B41M5/24 |
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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