发明名称 |
Optical videodisc with variable width tracks |
摘要 |
A disc-shaped record carrier is described on which information is recorded in an optical structure of trackwise arranged areas and intermediate areas. By adapting the average dimensions of the areas to the average spatial frequencies on the record carrier a read signal can be obtained of sufficient modulation depth and minimal distortion. This is accomplished by increasing the track width with decreasing radius of the record carrier.
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申请公布号 |
US4118734(A) |
申请公布日期 |
1978.10.03 |
申请号 |
US19760737321 |
申请日期 |
1976.10.29 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
BOUWHUIS, GIJSBERTUS;BRAAT, JOSEPHUS JOHANNES MARIA;JACOBS, BERNARDUS ANTONIUS JOHANNUS |
分类号 |
G11B7/0045;G11B7/013;G11B7/135;(IPC1-7):H04N5/76 |
主分类号 |
G11B7/0045 |
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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