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公开(公告)号：US20100097917A1
公开(公告)日：2010-04-22
申请号：US12513616
申请日：2008-02-19
IPC分类号： G11B7/00
CPC分类号： G02B5/1861 , G02B5/1819 , G02B5/1842 , G02B26/0808 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and appropriate focus control can be performed based on the signals detected by the photodetector, and a diffractive optical element that can be used in the optical pickup, which has a semiconductor laser 10 that can emit three types of laser light, a diffractive optical element 42 that diffracts the laser light reflected from the optical disc 31, and a single photodetector 43 that detects the diffracted light exiting the diffractive optical element 42. The diffractive optical element 42 is structured so that 0-order light is the maximal component of the diffracted light generated from each of two of three types of laser light, the two having close wavelengths (with a small wavelength difference), and +1-order light or −1-order light is the maximal component of the diffracted light generated from the remaining one type of laser light.
摘要翻译： 具有简化结构的光学拾取器，其中根据光盘的类型，可以将来自三种类型的激光的衍射光有效地引导到光电检测器上，并且可以基于由光电检测器检测的信号执行适当的聚焦控制，以及 可以用于具有能够发射三种激光的半导体激光器10的光学拾取器中的衍射光学元件，衍射从光盘31反射的激光的衍射光学元件42和单个光电检测器43 它检测离开衍射光学元件42的衍射光。衍射光学元件42被构造成使得0级光是从三种类型的激光中的两种中的两种中的每一种产生的衍射光的最大分量，其中两个具有接近的波长 （具有小的波长差），+ 1次光或-1次光是衍射光产生的最大分量fr 剩下的一种类型的激光。
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公开(公告)号：US07266072B2
公开(公告)日：2007-09-04
申请号：US10976811
申请日：2004-11-01
申请人： Masahisa Shinoda , Kenya Nakai
发明人： Masahisa Shinoda , Kenya Nakai
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/082 , G11B7/22 , H01S5/02212 , H01S5/02268 , H01S5/02296 , H01S5/4031 , H01S5/4087
摘要： A semiconductor laser unit includes a plurality of semiconductor laser elements arranged parallel with one another in a laser beam-emitting direction, and a base for positioning and fixing the plurality of semiconductor laser elements. The plurality of semiconductor laser elements are arranged such that a laser beam emitted from the semiconductor laser element greatest in astigmatism, of the plurality of semiconductor laser elements, is coincident in its axis with a reference axis of the base. In the case that the semiconductor laser unit is arranged on an optical head device, the focusing characteristic on the plurality of laser beams can be improved.
摘要翻译： 半导体激光单元包括在激光束发射方向上彼此平行布置的多个半导体激光元件和用于定位和固定多个半导体激光元件的基底。 多个半导体激光元件被布置成使得从多个半导体激光元件中以散光最大的半导体激光元件发射的激光束在其轴线与基座的参考轴线重合。 在半导体激光单元配置在光学头装置上的情况下，可以提高多个激光束的聚焦特性。
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公开(公告)号：US20120106310A1
公开(公告)日：2012-05-03
申请号：US13380791
申请日：2011-01-17
IPC分类号： G11B7/1353 , G11B7/1374
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/131 , G11B7/1353 , G11B7/13925 , G11B7/1395 , G11B2007/0013
摘要： An optical head device mounted in an optical disc device. The optical head device is provided with a diffractive optical element and a photodetector. The diffractive optical element has: a primary diffraction region at a location on which the positive and negative first-order components and some of the zero-order component of a reflectively diffracted light beam are incident; and secondary diffraction regions at locations on which the rest of the zero-order component but none of the positive or negative first-order components of the reflectively diffracted light beam are incident. A main light-receiving section of the photodetector receives the zero-order component of a transmissively diffracted light beam that has passed through the primary diffraction region and the secondary diffraction regions. Secondary light-receiving sections receive the positive first-order component and/or the negative first-order component of the transmissively diffracted light beam that has passed through the secondary diffraction regions.
摘要翻译： 安装在光盘装置中的光学头装置。 光头装置设置有衍射光学元件和光电检测器。 衍射光学元件具有：反射衍射光束的正，负一阶分量和零级分量的一部分入射的位置处的主衍射区域; 以及零反射衍射光束的零级分量的其余部分而不是反射衍射光束的正或负一阶分量的位置处的次级衍射区域。 光检测器的主光接收部接收通过一次衍射区域和二次衍射区域的透射衍射光束的零级分量。 次级光接收部分接收通过次级衍射区域的透射衍射光束的正一级分量和/或负一级分量。
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公开(公告)号：US20090303850A1
公开(公告)日：2009-12-10
申请号：US12375138
申请日：2007-05-22
申请人： Kenya Nakai , Masahisa Shinoda , Nobuo Takeshita
发明人： Kenya Nakai , Masahisa Shinoda , Nobuo Takeshita
CPC分类号： G11B7/24 , G11B7/0901 , G11B7/0941 , G11B7/24085 , G11B2007/24308 , G11B2007/2431 , G11B2007/24314 , G11B2007/24316
摘要： When using an optical disc medium that includes pit trains having their widths narrower than a diffraction limit, it is difficult to detect a tracking error signal and take a tracking-servo control while increasing pit density in a direction orthogonal to a pit-train extension direction.Information pit trains are arranged spirally or concentrically and formed in a structure in which their depths are changed periodically at a pitch radially along the optical disc medium, so that the tracking error signal can be obtained by push-pull detection of diffraction light from the structure.
摘要翻译： 当使用包括其宽度窄于衍射极限的凹坑列的光盘介质时，难以检测跟踪误差信号并进行跟踪伺服控制，同时在垂直于凹坑列延伸方向的方向上增加凹坑密度 。 信息坑列被螺旋地或同心地布置并且形成在其深度沿着光盘介质沿径向周期性地改变的结构中，从而可以通过来自结构的衍射光的推挽检测来获得跟踪误差信号 。
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公开(公告)号：US20050094693A1
公开(公告)日：2005-05-05
申请号：US10976811
申请日：2004-11-01
申请人： Masahisa Shinoda , Kenya Nakai
发明人： Masahisa Shinoda , Kenya Nakai
CPC分类号： G11B7/1275 , G11B7/082 , G11B7/22 , H01S5/02212 , H01S5/02268 , H01S5/02296 , H01S5/4031 , H01S5/4087
摘要： A semiconductor laser unit includes a plurality of semiconductor laser elements arranged parallel with one another in a laser beam-emitting direction, and a base for positioning and fixing the plurality of semiconductor laser elements. The plurality of semiconductor laser elements are arranged such that a laser beam emitted from the semiconductor laser element greatest in astigmatism, of the plurality of semiconductor laser elements, is coincident in its axis with a reference axis of the base. In the case that the semiconductor laser unit is arranged on an optical head device, the focusing characteristic on the plurality of laser beams can be improved.
摘要翻译： 半导体激光单元包括在激光束发射方向上彼此平行布置的多个半导体激光元件和用于定位和固定多个半导体激光元件的基底。 多个半导体激光元件被布置成使得从多个半导体激光元件中以散光最大的半导体激光元件发射的激光束在其轴线与基座的参考轴线重合。 在半导体激光单元配置在光学头装置上的情况下，可以提高多个激光束的聚焦特性。
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公开(公告)号：US08472300B2
公开(公告)日：2013-06-25
申请号：US13380791
申请日：2011-01-17
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/131 , G11B7/1353 , G11B7/13925 , G11B7/1395 , G11B2007/0013
摘要： An optical head device mounted in an optical disc device. The optical head device is provided with a diffractive optical element and a photodetector. The diffractive optical element has: a primary diffraction region at a location on which the positive and negative first-order components and some of the zero-order component of a reflectively diffracted light beam are incident; and secondary diffraction regions at locations on which the rest of the zero-order component but none of the positive or negative first-order components of the reflectively diffracted light beam are incident. A main light-receiving section of the photodetector receives the zero-order component of a transmissively diffracted light beam that has passed through the primary diffraction region and the secondary diffraction regions. Secondary light-receiving sections receive the positive first-order component and/or the negative first-order component of the transmissively diffracted light beam that has passed through the secondary diffraction regions.
摘要翻译： 安装在光盘装置中的光学头装置。 光头装置设置有衍射光学元件和光电检测器。 衍射光学元件具有：反射衍射光束的正，负一阶分量和零级分量的一部分入射的位置处的初级衍射区域; 以及零反射衍射光束的零级分量的其余部分而不是反射衍射光束的正或负一阶分量的位置处的次级衍射区域。 光检测器的主光接收部接收通过一次衍射区域和二次衍射区域的透射衍射光束的零级分量。 次级光接收部分接收通过次级衍射区域的透射衍射光束的正一级分量和/或负一级分量。
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公开(公告)号：US08134908B2
公开(公告)日：2012-03-13
申请号：US12513616
申请日：2008-02-19
IPC分类号： G11B7/00
CPC分类号： G02B5/1861 , G02B5/1819 , G02B5/1842 , G02B26/0808 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and appropriate focus control can be performed based on the signals detected by the photodetector, and a diffractive optical element that can be used in the optical pickup, which has a semiconductor laser 10 that can emit three types of laser light, a diffractive optical element 42 that diffracts the laser light reflected from the optical disc 31, and a single photodetector 43 that detects the diffracted light exiting the diffractive optical element 42. The diffractive optical element 42 is structured so that 0-order light is the maximal component of the diffracted light generated from each of two of three types of laser light, the two having close wavelengths (with a small wavelength difference), and +1-order light or −1-order light is the maximal component of the diffracted light generated from the remaining one type of laser light.
摘要翻译： 具有简化结构的光学拾取器，其中根据光盘的类型，可以将来自三种类型的激光的衍射光有效地引导到光电检测器上，并且可以基于由光电检测器检测的信号执行适当的聚焦控制，以及 可以用于具有能够发射三种激光的半导体激光器10的光学拾取器中的衍射光学元件，衍射从光盘31反射的激光的衍射光学元件42和单个光电检测器43 它检测离开衍射光学元件42的衍射光。衍射光学元件42被构造成使得0级光是从三种类型的激光中的两种中的两种中的每一种产生的衍射光的最大分量，其中两个具有接近的波长 （具有小的波长差），+ 1次光或-1次光是衍射光产生的最大分量fr 剩下的一种类型的激光。
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8.发明申请公开(公告)号：US20080205235A1
公开(公告)日：2008-08-28
申请号：US12071131
申请日：2008-02-15
CPC分类号： G11B7/22 , G11B7/1376 , G11B7/13925
摘要： An optical-pickup-adjustment optical disk used for adjusting or producing an optical pickup device, includes a transparent protective substrate; and an optical-pickup-adjustment middle-depth information recording layer formed on a side of an inside surface of the transparent protective substrate, wherein the optical-pickup-adjustment middle-depth information recording layer is formed to have a middle depth which is a center of the maximum depth of the maximum-depth information recording layer prescribed by the optical disk standard and the minimum depth of the minimum-depth information recording layer prescribed by the optical disk standard.
摘要翻译： 用于调整或制造光拾取装置的光拾取调节光盘包括透明保护基片; 以及形成在透明保护基板的内侧的一侧的光拾取器调节中深信息记录层，其中，光拾取器调节中深信息记录层形成为具有中间深度 由光盘标准规定的最大深度信息记录层的最大深度的中心和由光盘标准规定的最小深度信息记录层的最小深度。
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公开(公告)号：US08693295B2
公开(公告)日：2014-04-08
申请号：US12375138
申请日：2007-05-22
申请人： Kenya Nakai , Masahisa Shinoda , Nobuo Takeshita
发明人： Kenya Nakai , Masahisa Shinoda , Nobuo Takeshita
IPC分类号： G11B7/00
CPC分类号： G11B7/24 , G11B7/0901 , G11B7/0941 , G11B7/24085 , G11B2007/24308 , G11B2007/2431 , G11B2007/24314 , G11B2007/24316
摘要： When using an optical disc medium that includes pit trains having their widths narrower than a diffraction limit, it is difficult to detect a tracking error signal and take a tracking-servo control while increasing pit density in a direction orthogonal to a pit-train extension direction. Information pit trains are arranged spirally or concentrically and formed in a structure in which their depths are changed periodically at a pitch radially along the optical disc medium, so that the tracking error signal can be obtained by push-pull detection of diffraction light from the structure.
摘要翻译： 当使用包括其宽度窄于衍射极限的凹坑列的光盘介质时，难以检测跟踪误差信号并进行跟踪伺服控制，同时在垂直于凹坑列延伸方向的方向上增加凹坑密度 。 信息坑列被螺旋地或同心地布置并且形成在其深度沿着光盘介质沿径向周期性地改变的结构中，从而可以通过来自结构的衍射光的推挽检测来获得跟踪误差信号 。
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10.发明授权公开(公告)号：US07782730B2
公开(公告)日：2010-08-24
申请号：US12071131
申请日：2008-02-15
CPC分类号： G11B7/22 , G11B7/1376 , G11B7/13925
摘要： An optical-pickup-adjustment optical disk used for adjusting or producing an optical pickup device, includes a transparent protective substrate; and an optical-pickup-adjustment middle-depth information recording layer formed on a side of an inside surface of the transparent protective substrate, wherein the optical-pickup-adjustment middle-depth information recording layer is formed to have a middle depth which is a center of the maximum depth of the maximum-depth information recording layer prescribed by the optical disk standard and the minimum depth of the minimum-depth information recording layer prescribed by the optical disk standard.
摘要翻译： 用于调整或制造光拾取装置的光拾取调节光盘包括透明保护基片; 以及形成在透明保护基板的内侧的一侧的光拾取器调节中深信息记录层，其中，光拾取器调节中深信息记录层形成为具有中间深度 由光盘标准规定的最大深度信息记录层的最大深度的中心和由光盘标准规定的最小深度信息记录层的最小深度。
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