发明名称 |
Optical disc drive, optical storage medium, optical storage medium inspection apparatus, and optical storage medium inspection method |
摘要 |
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.
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申请公布号 |
US2008247290(A1) |
申请公布日期 |
2008.10.09 |
申请号 |
US20070980662 |
申请日期 |
2007.10.31 |
申请人 |
KADOWAKI SHIN-ICHI;SHOJI MAMORU;NAKAMURA ATSUSHI;ISHIDA TAKASHI |
发明人 |
KADOWAKI SHIN-ICHI;SHOJI MAMORU;NAKAMURA ATSUSHI;ISHIDA TAKASHI |
分类号 |
H04Q7/00;G01N21/95;G01R31/312;G01R31/317;G11B7/0037;G11B20/10;G11B20/14 |
主分类号 |
H04Q7/00 |
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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