发明名称 |
Optical disk with narrow guide tracks |
摘要 |
In an optical disk having an optical recording layer which is capable of having information thereon using a laser beam with information superposed by modulation there is formed a spiral protruding or recessed track having a width equal to about half or less of the wavelength of a laser beam to be used, this track being utilized as the guiding track of the laser beam. A method for manufacturing such an optical disk is also disclosed according to which a recessed track for tracking is formed by plastic deformation of the upper surface of an original disk with a hard processing stylus such as a diamond stylus. The original disk thus produced is utilized for forming an optical recording disk having a protruding or recessed guiding track.
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申请公布号 |
US4517668(A) |
申请公布日期 |
1985.05.14 |
申请号 |
US19830490225 |
申请日期 |
1983.04.29 |
申请人 |
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA |
发明人 |
TAKAOKA, TAKASHI;MOCHIZUKI, MASAHIKO;YAMASHITA, MITSUO;MIURA, TADAO |
分类号 |
G11B7/24;G11B7/26;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/24 |
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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