| 发明名称 |
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| 摘要 |
An optical information recording medium comprising: a substrate; a recording film in which an optically detectable amount is subjected to change; and at least one additional layer; the recording film and the additional layer being provided on the substrate; information being recorded by partially changing the recording film through irradiation of a laser beam thereto and being reproduced by optically detecting change of the optically detectable amount; the recording film being made of material assuming a plurality of states having different optical constants, respectively; physical conditions of the additional layer being selected such that a differential coefficient of the optically detectable amount relative to the optical con- stants is small in at least one of the states. |
| 申请公布号 |
JP2778237(B2) |
申请公布日期 |
1998.07.23 |
| 申请号 |
JP19900255830 |
申请日期 |
1990.09.25 |
| 申请人 |
MATSUSHITA DENKI SANGYO KK |
发明人 |
AKAHIRA NOBUO;OONO EIJI;NISHIUCHI KENICHI;OSADA KENICHI;YAMADA NOBORU |
| 分类号 |
G11B7/00;G11B7/24;G11B7/30 |
主分类号 |
G11B7/00 |
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