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1. 发明申请

US20080117789A1 OPTICAL PICKUP DEVICE 审中-公开
标题翻译：光学拾取器件
公开(公告)号：US20080117789A1
公开(公告)日：2008-05-22
申请号：US11940796
申请日：2007-11-15
申请人： Taizoh Yokota , Osamu Miyazaki , Yasuo Nakata
发明人： Taizoh Yokota , Osamu Miyazaki , Yasuo Nakata
IPC分类号： G11B7/135 , G11B7/00
CPC分类号： G11B7/1376 , G11B7/1365 , G11B7/1374 , G11B7/13925 , G11B7/1395 , G11B2007/0006
摘要： In the optical pickup device, a luminous flux emitted from a blue-violet laser as S wave to a blue-violet PBS, passes through a half-wave plate, and is reflected by the blue-violet PBS and a total reflection mirror, before being applied to a BD disc via an objective lens. Luminous fluxes, which were emitted respectively from an infrared laser emitting device and a red laser emitting device and were reflected respectively by infrared and red PBSs, among aligned infrared, red and blue-violets PBSs, before reaching the blue-violet PBS, are reflected by the blue-violet PBS. The luminous fluxes emitted from the blue-violet laser emitting device as P waves pass the blue-violet PBS, and are respectively applied to a CD disc, a DVD disc, or a HD-DVD disc via an diffractive object lens. Thus, it becomes possible to write or read access to four kinds of discs with three wavelengths.
摘要翻译：在光拾取装置中，从蓝紫激光作为S波向蓝紫色PBS发射的光束通过半波片，并在蓝紫色PBS和全反射镜之前反射，之前通过物镜应用于BD盘。分别从红外激光发射装置和红色激光发射装置分别发射的红光和红色PBS在对准的红外线，红色和蓝紫罗兰PBS中的光通量在达到蓝紫色PBS之前被反射由蓝紫色PBS。从蓝紫色激光发射装置发出的光通量为P波通过蓝紫色PBS，分别通过衍射物镜施加到CD盘，DVD盘或HD-DVD盘。因此，可以对具有三个波长的四种盘进行写入或读取。

2. 发明申请

US20070081441A1 Optical pickup device and information recording/reproducing apparatus 审中-公开
标题翻译：光学拾取装置和信息记录/再现装置
公开(公告)号：US20070081441A1
公开(公告)日：2007-04-12
申请号：US11546132
申请日：2006-10-10
申请人： Taizoh Yokota
发明人： Taizoh Yokota
IPC分类号： G11B7/135
CPC分类号： G11B7/1356 , G11B7/1275 , G11B2007/0006
摘要： An optical pickup device according to the present invention having two light sources is capable of emitting lights having different wavelengths from each other for recording/reproducing information on/from an optical recording medium by using a light from the light source; wherein the two light sources both are capable of emitting either polarization lights in one polarization direction or polarization lights perpendicular to the one polarization direction, and each of the two light sources is arranged at a predetermined position depending on a polarization direction of the light to be emitted.
摘要翻译：根据本发明的具有两个光源的光拾取装置能够发射彼此不同波长的光，以便通过使用来自光源的光从光记录介质上记录/再现信息; 其中两个光源都能够发射一个偏振方向的偏振光或垂直于该一个偏振方向的偏振光，并且两个光源中的每个光源根据光的偏振方向被布置在预定位置发射。

3. 发明授权

US07405383B2 Optical pickup device having three light sources with a holographic element for directing diffraction light to photodetectors 失效
$Optical pickup device having three light sources with a holographic element for directing diffraction light to photodetectors$
标题翻译：具有三个光源的光学拾取装置，其具有用于将衍射光引导到光电检测器的全息元件
公开(公告)号：US07405383B2
公开(公告)日：2008-07-29
申请号：US11704305
申请日：2007-02-09
申请人： Taizoh Yokota
发明人： Taizoh Yokota
IPC分类号： G02B7/04
CPC分类号： G02B27/1086 , G02B5/32 , G02B27/1073 , G02B27/144 , G02B27/145 , G02B27/40 , G11B7/0903 , G11B7/0916 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical pickup device has three different light sources, a holographic element, beam splitters, and first and second photodetectors. The beam splitters each change an optical path of a light beam coming from the associated light source toward a recording medium and match an optical axis of the changed optical path with an optical axis passing through the holographic element and the first photodetector. Reflected light from the recording medium is divided into zero-order diffraction light and first-order diffraction light by the holographic element. The first photodetector receives the zero-order diffraction light and obtains an RF signal and a tracking error signal. The second photodetector receives the first-order diffraction light and obtains a focusing error signal.
摘要翻译：光拾取装置具有三种不同的光源，全息元件，分束器以及第一和第二光电检测器。分束器各自将来自相关联的光源的光束的光路朝向记录介质改变，并且将改变的光路的光轴与通过全息元件和第一光电检测器的光轴匹配。来自记录介质的反射光被全息元件分为零级衍射光和一级衍射光。第一光电检测器接收零级衍射光并获得RF信号和跟踪误差信号。第二光电检测器接收一级衍射光并获得聚焦误差信号。

4. 发明申请

US20070195659A1 Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US20070195659A1
公开(公告)日：2007-08-23
申请号：US11704305
申请日：2007-02-09
申请人： Taizoh Yokota
发明人： Taizoh Yokota
IPC分类号： G11B7/00 , G02B27/40 , G02B27/64 , G02B7/04
CPC分类号： G02B27/1086 , G02B5/32 , G02B27/1073 , G02B27/144 , G02B27/145 , G02B27/40 , G11B7/0903 , G11B7/0916 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical pickup device has three different light sources, a holographic element, beam splitters, and first and second photodetectors. The beam splitters each change an optical path of a light beam coming from the associated light source toward a recording medium and match an optical axis of the changed optical path with an optical axis passing through the holographic element and the first photodetector. Reflected light from the recording medium is divided into zero-order diffraction light and first-order diffraction light by the holographic element. The first photodetector receives the zero-order diffraction light and obtains an RF signal and a tracking error signal. The second photodetector receives the first-order diffraction light and obtains a focusing error signal.
摘要翻译：光拾取装置具有三种不同的光源，全息元件，分束器以及第一和第二光电检测器。分束器各自将来自相关联的光源的光束的光路朝向记录介质改变，并且将改变的光路的光轴与通过全息元件和第一光电检测器的光轴匹配。来自记录介质的反射光被全息元件分为零级衍射光和一级衍射光。第一光电检测器接收零级衍射光并获得RF信号和跟踪误差信号。第二光电检测器接收一级衍射光并获得聚焦误差信号。

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