发明申请
US20130021892A1 INFORMATION RECORDING AND REPRODUCING APPARATUS 有权
信息记录和再现设备

INFORMATION RECORDING AND REPRODUCING APPARATUS
摘要:
According to one embodiment, an information recording and reproducing apparatus including, a focus control module, an objective lens control module, a calculation module, and a tracking control module. If, detection the recording marks line, to focus a laser light of a second wavelength to the recording layer through an objective lens and to operation a recording layer tracking control using a tracking error signal taken out from a second reflected light and a laser light of a first wavelength to a track groove through the objective lens and to operation a guide layer tracking control to control the objective lens using a tracking error signal taken out from a first reflected light.
公开/授权文献
信息查询
0/0