发明名称 |
Apparatus for generating seek direction detection signal |
摘要 |
An apparatus for use in an optical disc includes an optical disc and an optical branching unit irradiating a main light beam and a sub-light beam, wherein the sub-light beam includes a optical aberration in a direction on a track of the optical disc. The apparatus further includes a photodetector including a plurality of portions receiving and processing the main light beam and a plurality of portions receiving and processing the sub-light beam. A track error signal detector detects a track error signal from the portions receiving the main light beam. A track cross signal detector detects a track cross signal from the portions receiving the main light beam and from the portions receiving the sub-light beam. A signal processor further compares the track error signal with the track cross signal to detect the seek direction of a light spot formed on the optical disc.
|
申请公布号 |
US2002006088(A1) |
申请公布日期 |
2002.01.17 |
申请号 |
US20010846264 |
申请日期 |
2001.05.02 |
申请人 |
MA BYUNG-IN;CHUNG CHONG-SAM;PARK IN-SIK;CHOI BYOUNG-HO;DOH TAE-YONG;JEON JIN-HOON |
发明人 |
MA BYUNG-IN;CHUNG CHONG-SAM;PARK IN-SIK;CHOI BYOUNG-HO;DOH TAE-YONG;JEON JIN-HOON |
分类号 |
G11B7/007;G11B7/085;G11B7/09;G11B7/095;G11B7/13;G11B7/135;(IPC1-7):G11B7/085 |
主分类号 |
G11B7/007 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|