发明名称 |
Optical information device, optical storage medium, optical storage medium inspection device, and optical storage inspection method |
摘要 |
<p>This optical disc drive has an optical pickup head that emits a light beam to an optical storage medium, detects the light beam reflected from the optical storage medium, and outputs a signal based on the received reflected light; a jitter measuring unit for measuring jitter in signals output from the optical pickup head; and an evaluation unit for determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.</p> |
申请公布号 |
EP2278349(A2) |
申请公布日期 |
2011.01.26 |
申请号 |
EP20100182600 |
申请日期 |
2003.04.02 |
申请人 |
PANASONIC CORPORATION |
发明人 |
KADOWAKI, SHIN-ICHI;SHOJI, MAMORU;NAKAMURA, ATSUSHI;ISHIDA, TAKASHI |
分类号 |
G01R31/312;G01N21/95;G01R31/317;G11B7/0037;G11B7/004;G11B7/24;G11B20/10;G11B20/14 |
主分类号 |
G01R31/312 |
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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