TRACKING CONTROL DEVICE, TRACKING CONTROL METHOD,

专利名称：TRACKING CONTROL DEVICE, TRACKING

CONTROL METHOD, AND OPTICAL DISCDEVICE

发明人：Kenji KONDO,Takeharu Yamamoto,Takashi

Kishimoto

申请号：US12765216申请日：20100422

公开号：US20100271911A1公开日：20101028

专利附图：

摘要：An object of this invention is to improve stability of tracking control and

improve recording and reproduction performance. The tracking control device comprisesa main push-pull signal generation section, which generates a main push-pull signal basedon a signal obtained by photoelectric conversion of return light of the main beam; amicrocomputer, which detects an other-layer stray light signal component included in asignal obtained by photoelectric conversion of return light of the sub-beam; a signalcorrection section, which corrects the signal obtained by photoelectric conversion of thereturn light of the sub-beam, based on the other-layer stray light signal component; anda sub-push-pull signal generation section, which generates a sub-push-pull signal basedon the corrected signal obtained by photoelectric conversion of the return light of thesub-beam.

申请人：Kenji KONDO,Takeharu Yamamoto,Takashi Kishimoto

地址：Osaka JP,Osaka JP,Nara JP

国籍：JP,JP,JP

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