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发明名称
光碟装置及光碟之聚焦层判别方法
摘要
本发明之目的在于提供一种能以简单之构成迅速地判别双层光碟上之聚焦层之光碟装置。本发明系基于设置于与反射光束之焦点前后相距等距离之位置之第1受光装置26A及第2受光装置26B之输出信号之信号位准比,判定双层光碟20上之光束所聚焦之聚焦记录层及该光束所未聚焦之非聚焦记录层之位置关系,基于该判定结果判别聚焦记录层,藉此可在光束聚焦于记录层之时点判别聚焦记录层,如此,可比过去更迅速地判别聚焦层。
申请公布号
TW200813986
申请公布日期
2008.03.16
申请号
TW096104283
申请日期
2007.02.06
申请人
新力股份有限公司
发明人
冈松和彦
分类号
G11B20/00(2006.01);G11B7/085(2006.01)
主分类号
G11B20/00(2006.01)
代理机构
代理人
陈长文
主权项
地址
日本
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