公开(公告)号：US20100118677A1

公开(公告)日：2010-05-13

申请号：US12690789

申请日：2010-01-20

申请人： Tetsuya FUSHIMI ,  Masaaki Kurebayashi

发明人： Tetsuya FUSHIMI ,  Masaaki Kurebayashi

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0908 ,  G11B7/1267 ,  G11B2007/0013

摘要： In an optical disc apparatus, whether an unrecorded recording layer without information recorded thereon is included in the multiple recording layers of the optical disc mounted inside the apparatus is judged. then when the unrecorded recording layer is judged to be present, a signal for focus offset adjustment is recorded in a non-user data recording area of the unrecorded recording layer, and reproduction of the recorded focus offset adjusting signal is followed by its quality evaluation, which is further followed by calculation and setup of an appropriate focus offset value based on evaluation results.

摘要翻译： 在光盘装置中，判断装在内部的光盘的多个记录层中是否包含没有记录信息的未记录的记录层。 那么当未记录的记录层被判定为存在时，用于聚焦偏移调整的信号被记录在未记录的记录层的非用户数据记录区中，并且记录的聚焦偏移调整信号的再现之后是其质量评估， 此后进一步根据评估结果计算和设置适当的聚焦偏移值。