发明名称 |
MAGNETOOPTICAL DATA CARRIER AND METHOD FOR MAKING SAID DATA CARRIER |
摘要 |
<p>Optical-recording medium having a light-transmitting substrate layer. …<??>CDs are such recording media, on which data are stored in so-called pits, that is to say depressions in a light-reflecting layer following the light-transmitting layer. In the case of magneto-optical discs, data are stored in a magneto-optical layer by magnetising in the one or the other direction of magnetisation. For reading the data stored in this way, use is made of the Kerr effect, which produces a measurable rotation of the polarisation plane when a linearly polarised light beam is reflected at the magneto-optical layer. Although both recording media - CD and magneto-optical disc - already have a high storage capacity, a considerable increase in the storage capacity is of great benefit, in particular for computer applications and as a video disc. …<??>In order to increase the storage capacity considerably, the light-transmitting substrate layer (1) is followed by a light-reflecting magneto-optical layer (2), in which data can be stored on the one hand by magnetising and on the other hand by means of depressions (3), so-called pits. The light-transmitting substrate layer (1) may also be followed by a partially transmitting magneto-optical layer (2) without pits (3), which is then followed by a light-transmitting layer (10). In this or a following layer (11), data can be stored by means of pits (3). …<??>Storage medium for computers, video disc, CD.</p> |
申请公布号 |
HU203815(B) |
申请公布日期 |
1991.09.30 |
申请号 |
HU19880005103 |
申请日期 |
1988.09.30 |
申请人 |
DEUTSCHE THOMSON-BRANDT GMBH.,DE |
发明人 |
MORIMOTO,YASUAKI,DE;BUECHLER,CHRISTIAN,DE;ZUCKER,CHRISTIAN,DE;SCHROEDER,HEINZ-JOERG,DE |
分类号 |
G11B13/00;G11B7/013;G11B7/24085;G11B11/10;G11B11/105;G11B13/04;(IPC1-7):G11B13/04;G11B7/24 |
主分类号 |
G11B13/00 |
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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