中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Application
WO2005106862B1 OPTICAL PICKUP UNIT, AND OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCING DEVICE PROVIDED WITH THE OPTICAL PICKUP UNIT 审中-公开
光学拾取单元和光学拾取器件以及提供有光学拾取单元的信息记录/再现设备

OPTICAL PICKUP UNIT, AND OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCING DEVICE PROVIDED WITH THE OPTICAL PICKUP UNIT
Abstract:
An optical pickup device is provided with a splitting part for splitting beams and a light receiving part for receiving the split beams. The light receiving part is provided with a main light receiving area for tracking, a sub light receiving area for tracking, and an auxiliary light receiving area. The auxiliary light receiving area is an area for receiving only the beams reflected by recording layers other than a recording layer wherein information recording/reproduction is performed, and has a light receiving area smaller than that of the sub light receiving area for tracking. The optical pickup device is provided with the splitting part for splitting beams and the light receiving part for receiving the split beams, and the light receiving part is provided with the sub light receiving area for receiving sub beams for tracking, and the sub light receiving area is arranged so as not to permit a main beam for focusing to enter from the recording layers other than the target recording layer.
Abstract(Chinese):

光拾取装置设有用于分束的分束部分和用于接收分束的光接收部分。 光接收部设置有用于跟踪的主光接收区域，用于跟踪的副光接收区域和辅助光接收区域。 辅助光接收区域是用于仅接收由执行信息记录/再现的记录层以外的记录层反射的光束并且具有比用于跟踪的副光接收区域的光接收区域更小的光束的区域。 光拾取装置设有用于分束的分束部分和用于接收分束的光接收部分，并且光接收部分设置有用于接收用于跟踪的子光束的副光接收区域，并且子光接收区域 被布置成不允许用于聚焦的主光束从除了目标记录层之外的记录层进入。

Patent Agency Ranking
0/0