公开(公告)号：US20110182164A1

公开(公告)日：2011-07-28

申请号：US12955119

申请日：2010-11-29

申请人： Tomoto KAWAMURA ,  Hiromi KITA ,  Hiroshi OGASAWARA ,  Michio HATAGI

发明人： Tomoto KAWAMURA ,  Hiromi KITA ,  Hiroshi OGASAWARA ,  Michio HATAGI

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/08582 ,  G11B7/1359 ,  G11B2007/0006

摘要： A thin-type optical head, smaller in optic mounting spaces comprising to the conventional one, in an optic system enabling with BD including a 2-layers BD, DVD an CD, comprises a light source, for emit a light beam therefrom; an optical branch element for penetrating a predetermined amount of lights, therethrough, of an incident light beam thereon, and to reflecting remaining amount of lights thereupon; a light focusing element for focusing the light beam upon an optical information recording medium; a photo detector for receiving the light beam reflecting upon the optical information recording medium; and an optical path converter element for converting an angle of an optical path, on which the light beam propagates, wherein the optical path converter element is disposed on an optical path of the light beam between the optical branch element and the photo detector, or between the optical branch element and the light source, and has an incident surface, upon which the light beam enters, and an emission surface, from which the light beams emits, so that the light beam reflects at least two (2) times within the optical path converter element, during time when passing through between the incident surface and the emission surface.

摘要翻译： 一种薄型光学头，在包括常规光学系统的光学安装空间中较小，在具有包括2层BD，DVD和CD的BD的光学系统中，包括用于从其发射光束的光源; 用于穿过其中的入射光束穿过其中的预定量的光并且反射剩余的光量的光学分支元件; 用于将光束聚焦在光学信息记录介质上的光聚焦元件; 光检测器，用于接收在光信息记录介质上反射的光束; 以及用于转换光束传播的光路的角度的光路转换器元件，其中光路转换器元件设置在光分支元件和光检测器之间的光束的光路上，或者在 光分支元件和光源，并且具有光束入射的入射表面和光束从其发射的发射表面，使得光束在光学器件内反射至少两（2）次 路径转换器元件，在通过入射表面和发射表面之间的时间期间。