公开(公告)号：US20120230172A1

公开(公告)日：2012-09-13

申请号：US13412649

申请日：2012-03-06

申请人： Takakiyo YASUKAWA ,  Taku Hoshizawa ,  Kunikazu Ohnishi ,  Yutaka Nagai

发明人： Takakiyo YASUKAWA ,  Taku Hoshizawa ,  Kunikazu Ohnishi ,  Yutaka Nagai

IPC分类号： G11B7/004

CPC分类号： G11B7/00736 ,  G11B7/0053 ,  G11B7/24094 ,  G11B20/00268 ,  G11B20/1217 ,  G11B20/1403 ,  G11B20/1426 ,  G11B2020/122 ,  G11B2220/2541

摘要： In the related art, writing of BCA data has been performed by a BCA cutter or the like after a user data area was formed. However, according to such a method, individual steps cannot help being provided for a disc manufacturing step in order to form the BCA. A burden on the disc manufacturer is large from a viewpoint of the number of disc producing steps and, further, manufacturing costs. By using a bit forming method similar to a user data area, the BCA manufacturing steps can be reduced. Specifically speaking, by devising a pit depth, a pit width, and a pit pattern, a modulation degree of a BCA portion can be further increased. A detecting method similar to that for the BCA in the related art can be applied.

摘要翻译： 在相关技术中，在形成用户数据区之后，通过BCA切割器等进行BCA数据的写入。 然而，根据这种方法，为了形成BCA，单独的步骤不能帮助提供用于盘制造步骤。 从盘片制造步骤的数量和制造成本来看，盘制造商的负担很大。 通过使用类似于用户数据区的位形成方法，可以减少BCA制造步骤。 具体来说，通过设计凹坑深度，凹坑宽度和凹坑图案，可以进一步提高BCA部分的调制度。 可以应用与现有技术中的BCA类似的检测方法。

公开(公告)号：US20130003022A1

公开(公告)日：2013-01-03

申请号：US13532819

申请日：2012-06-26

申请人： Teppei Tanaka ,  Takeshi Nakao ,  Masato Sugiyama ,  Michio Hatagi ,  Tomoto Kawamura ,  Hiromi Kita ,  Kunikazu Ohnishi

发明人： Teppei Tanaka ,  Takeshi Nakao ,  Masato Sugiyama ,  Michio Hatagi ,  Tomoto Kawamura ,  Hiromi Kita ,  Kunikazu Ohnishi

IPC分类号： G03B21/14 ,  G02B26/10

CPC分类号： G02B26/108 ,  H04N9/3129 ,  H04N9/3167 ,  H04N9/3173

摘要： A polarizing prism is shaped in the form of a hexahedron. A polarizing beam splitter film (PBS film) is arranged approximately in a diagonal direction of the hexahedron. The polarizing prism holds a relationship of A

摘要翻译： 偏振棱镜成形为六面体形式。 偏振分束膜（PBS膜）大致沿着六面体的对角线方向排列。 当偏光棱镜在光束到屏幕的出射方向（Y方向）上的尺寸为A时，其与来自光的光束的入射方向（X方向）的尺寸保持A

公开(公告)号：US20120293775A1

公开(公告)日：2012-11-22

申请号：US13473713

申请日：2012-05-17

申请人： Hiromi KITA ,  Kunikazu Ohnishi

发明人： Hiromi KITA ,  Kunikazu Ohnishi

IPC分类号： G03B21/14

CPC分类号： G02B26/101 ,  G02B26/105

摘要： A scanning type projector for scanning an optical beam emitted from a laser light source has a collimator lens and a scanning device. A beam demagnifying and shaping prism is disposed between the collimator lens and the scanning device. The cross section of the beam that is elliptical is demagnified along the major axis of the ellipse such that the cross section of the beam is shaped. Thus, the cross section of the beam fits within the effective diameter of a deflecting mirror incorporated in the scanning device. The optical beam is reflected efficiently. A bright image can be projected. The resolution is improved by the beam shaping effect.

摘要翻译： 用于扫描从激光光源发射的光束的扫描型投影仪具有准直透镜和扫描装置。 光束缩小和成形棱镜设置在准直透镜和扫描装置之间。 椭圆形的梁的横截面沿着椭圆的长轴被缩小，使得梁的横截面成形。 因此，梁的横截面适合于结合在扫描装置中的偏转镜的有效直径。 光束被有效地反射。 可以投射明亮的图像。 光束整形效果提高了分辨率。

公开(公告)号：US07911915B2

公开(公告)日：2011-03-22

申请号：US11905526

申请日：2007-10-02

申请人： Kunikazu Ohnishi ,  Tomoto Kawamura ,  Masayuki Inoue

发明人： Kunikazu Ohnishi ,  Tomoto Kawamura ,  Masayuki Inoue

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0945 ,  G11B2007/0006

摘要： An optical pickup includes a diffraction grating partitioned into three areas, in which the phase of periodic grating groove structure in an area is successively shifted from that in the adjacent area by 90°. In the generation of a differential push-pull signal, an amplification factor K for sub push-pull signals is varied depending on the type of the optical disk. By such composition of the optical pickup, amplitude deterioration of the tracking error signal accompanying displacement of the object lens is reduced.

摘要翻译： 光学拾取器包括分为三个区域的衍射光栅，其中区域中的周期性光栅槽结构的相位相继地从相邻区域中的相位移动90°。 在产生差分推挽信号时，副推挽信号的放大系数K根据光盘的类型而变化。 通过光学拾取器的这种组合，伴随物镜位移的跟踪误差信号的振幅恶化减小。

公开(公告)号：US07715298B2

公开(公告)日：2010-05-11

申请号：US11508969

申请日：2006-08-24

申请人： Kunikazu Ohnishi

发明人： Kunikazu Ohnishi

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G02B27/14 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/13927

摘要： An optical pickup module with enhanced aberration correctability is disclosed. This pickup includes more than two different types of laser light sources, an objective lens for collecting and focusing any one of the laser beams leaving the light sources onto an optical disc, and an aberration correction device of the liquid crystal (LC) type, which is disposed between the light sources and the objective lens. The aberration corrector has a surface on which multiple spaced-apart electrodes are patterned for enabling aberration correction relative to incident beams. The corrector controls the potential of a voltage being applied to each electrode in deference to incident beam properties and variations occurrable thereto, e.g., wavelength, effective beam diameter and relative incidence position offsets, thereby to optimally correct beam aberrations, such as coma aberration or wavefront aberration. An optical information reproduction apparatus using the pickup is also disclosed.

摘要翻译： 公开了具有增强的像差校正性的光学拾取模块。 该拾取器包括两种不同类型的激光光源，用于收集和聚焦离开光源的任何一个激光束到光盘上的物镜，以及液晶（LC）类型的像差校正装置， 设置在光源和物镜之间。 像差校正器具有其上形成有多个间隔开的电极以使得能够相对于入射光束进行像差校正的表面。 校正器根据入射光束的特性和发生的变化来控制施加到每个电极的电压的电位，例如波长，有效光束直径和相对入射位置偏移，从而最佳地校正诸如彗形像差或波前的光束像差 像差 还公开了一种使用拾取器的光学信息再现设备。

公开(公告)号：US07590043B2

公开(公告)日：2009-09-15

申请号：US11905529

申请日：2007-10-02

申请人： Kunikazu Ohnishi ,  Tomoto Kawamura ,  Masayuki Inoue

发明人： Kunikazu Ohnishi ,  Tomoto Kawamura ,  Masayuki Inoue

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0945 ,  G11B2007/0006

摘要： An optical pickup includes a diffraction grating partitioned into three areas, in which the phase of periodic grating groove structure in an area is successively shifted from that in the adjacent area by 90°. In the generation of a differential push-pull signal, an amplification factor K for sub push-pull signals is varied depending on the type of the optical disk. By such composition of the optical pickup, amplitude deterioration of the tracking error signal accompanying displacement of the object lens is reduced.

摘要翻译： 光学拾取器包括分为三个区域的衍射光栅，其中区域中的周期性光栅槽结构的相位相继地从相邻区域中的相位移动90°。 在产生差分推挽信号时，副推挽信号的放大系数K根据光盘的类型而变化。 通过光学拾取器的这种组合，伴随物镜位移的跟踪误差信号的振幅恶化减小。

公开(公告)号：US20070223349A1

公开(公告)日：2007-09-27

申请号：US11508628

申请日：2006-08-22

申请人： Kenichi Shimada ,  Kunikazu Ohnishi ,  Nobuhiro Konuma

发明人： Kenichi Shimada ,  Kunikazu Ohnishi ,  Nobuhiro Konuma

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/0903 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup for writing information to and/or for reading information from an optical disc having at least two recording layers (dual layer) provided with first and second recording layers can prevent layer crosstalk resulting from disturbing a signal reproduced from the first recording layer by a reflected light beam reflected from the second recording layer during a writing operation for writing information to the first recording layer or a reading operation for reading information from the fist recording layer. An orthogonal polarization region forming component forms an orthogonal polarization region, in which respective directions of polarization of a first light beam focused on and reflected by a first recording layer of an optical disc and a second light beam reflected by a second recording layer of the optical disc are perpendicular to each other, in a region, in which the first and the second light beam overlap each other, on a light-receiving surface of a detector. The orthogonal polarization region forming component is a polarization switch for changing the directions of polarization of part or all of the first and the second light beam.

摘要翻译： 用于向具有第一和第二记录层的至少两个记录层（双层）的光盘写入信息和/或从其读取信息的光学拾取器可以防止由于干扰由第一记录层再现的信号而引起的层串扰 在用于将信息写入第一记录层的写入操作期间从第二记录层反射的反射光束或用于从第一记录层读取信息的读取操作。 正交偏振区域形成部件形成正交偏振区域，其中聚焦在光盘的第一记录层上的第一光束的偏振方向和由光学器件的第二记录层反射的第二光束 在第一和第二光束彼此重叠的区域中，光盘在检测器的光接收表面上彼此垂直。 正交偏振区域形成部件是用于改变第一和第二光束的部分或全部的偏振方向的偏振开关。

公开(公告)号：US20070146892A1

公开(公告)日：2007-06-28

申请号：US11508969

申请日：2006-08-24

申请人： Kunikazu Ohnishi

发明人： Kunikazu Ohnishi

IPC分类号： G02B27/14 ,  G11B7/00

CPC分类号： G11B7/005 ,  G02B27/14 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/13927

摘要： An optical pickup module with enhanced aberration correctability is disclosed. This pickup includes more than two different types of laser light sources, an objective lens for collecting and focusing any one of the laser beams leaving the light sources onto an optical disc, and an aberration correction device of the liquid crystal (LC) type, which is disposed between the light sources and the objective lens. The aberration corrector has a surface on which multiple spaced-apart electrodes are patterned for enabling aberration correction relative to incident beams. The corrector controls the potential of a voltage being applied to each electrode in deference to incident beam properties and variations occurrable thereto, e.g., wavelength, effective beam diameter and relative incidence position offsets, thereby to optimally correct beam aberrations, such as coma aberration or wavefront aberration. An optical information reproduction apparatus using the pickup is also disclosed.

摘要翻译： 公开了具有增强的像差校正性的光学拾取模块。 该拾取器包括两种不同类型的激光光源，用于收集和聚焦离开光源的任何一个激光束到光盘上的物镜，以及液晶（LC）类型的像差校正装置， 设置在光源和物镜之间。 像差校正器具有其上形成有多个间隔开的电极以使得能够相对于入射光束进行像差校正的表面。 校正器根据入射光束特性和可能发生的变化控制施加到每个电极的电压的电位，例如波长，有效光束直径和相对入射位置偏移，从而最佳地校正诸如彗形像差或波前的光束像差 像差 还公开了一种使用拾取器的光学信息再现设备。

公开(公告)号：US06778475B2

公开(公告)日：2004-08-17

申请号：US10294943

申请日：2002-11-15

申请人： Katsuhiko Izumi ,  Kunikazu Ohnishi ,  Kenichi Shimada ,  Masayuki Inoue ,  Shinji Fujita

发明人： Katsuhiko Izumi ,  Kunikazu Ohnishi ,  Kenichi Shimada ,  Masayuki Inoue ,  Shinji Fujita

IPC分类号： G11B700

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0943 ,  G11B2007/0006

摘要： An optical pickup has a semiconductor laser having two laser sources of different wavelengths disposed in the same package, one diffraction grating and one optical detector. A plurality of light reception areas each having four divisional light reception planes of a -character shape are disposed at positions where light beams reflected from an optical disc are applied. A focus error signal is generated by an astigmatism method by using independently these light reception areas and a tracking error signal is generated by a differential phase detection method by using one or both the light reception areas.

摘要翻译： 光拾取器具有设置在相同封装中的两个具有不同波长的激光源的半导体激光器，一个衍射光栅和一个光学检测器。 多个光接收区域，每个具有四个分光接收面的 - 字符形状设置在从光盘反射的光束被施加的位置。 通过独立地使用这些光接收区域通过散光法产生聚焦误差信号，并且通过使用光接收区域中的一个或两个，通过差分相位检测方法生成跟踪误差信号。

公开(公告)号：US5930220A

公开(公告)日：1999-07-27

申请号：US770075

申请日：1996-12-19

申请人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

发明人： Takeshi Shimano ,  Akira Arimoto ,  Takeshi Nakao ,  Masayuki Inoue ,  Kunikazu Ohnishi ,  Yoshio Suzuki

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/094 ,  G11B7/131 ,  G11B2007/0006 ,  G11B7/0901 ,  G11B7/0909

摘要： In an optical head, light from a semiconductor laser is directed through a condensing optical system with a condensing lens onto an optical information recording medium through a transparent substrate in the form of a light spot. A unit for producing a light spot position control signal and a unit able to move the light spot, which supports the objective lens for movement, position the light spot on an information track. Light reflected from the optical information recording medium is directed through a polarized light branching element to a photo detector. Also mounted for movement with the objective lens are a polarization conversion element, arranged between the optical information recording medium and the polarized light branching element in order to change the polarization state of light incident to the optical information recording medium and reflected therefrom and a polarization diffraction grating, the diffraction efficiency of which changes depending on the change in the polarization state of the incident light and the reflected light caused by the polarization conversion element. The light spot control signal is detected from both reflected light diffracted through the polarization diffraction grating and non-diffracted reflected light contained in the light which passes through the polarized light branching element.

摘要翻译： 在光头中，来自半导体激光器的光通过具有聚光透镜的聚光系统通过光点形式的透明基板引导到光信息记录介质上。 用于产生光点位置控制信号的单元和能够移动支持物镜移动的光点的单元将光斑定位在信息轨道上。 从光信息记录介质反射的光通过偏振光分支元件被引导到光检测器。 为了使入射到光信息记录介质的光的偏振状态改变并反射，偏振转换元件也安装在光学信息记录介质和偏振光分支元件之间，并且偏振衍射元件 光栅，其衍射效率根据入射光的偏振态和由偏振转换元件引起的反射光的变化而变化。 从通过偏振衍射光栅衍射的反射光和通过偏振光分支元件的光中包含的非衍射反射光检测光点控制信号。