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：US20120300276A1

公开(公告)日：2012-11-29

申请号：US13479492

申请日：2012-05-24

申请人： Kunikazu OHNISHI

发明人： Kunikazu OHNISHI

IPC分类号： G02B26/10

CPC分类号： H04N9/3129 ,  G02B26/101 ,  G02B26/105 ,  G02B27/0031 ,  H04N9/3185

摘要： In a scanning image display device including a function to project and display a two-dimensional image on a projection screen using a deflecting unit that repeatedly operates a predetermined reflecting mirror surface to two-dimensionally scan a light beam, a large image distortion inevitably occurs, which is caused by the reflecting mirror surface that repeatedly and two-dimensionally operates for deflection. In order to solve the problem, a free-form surface lens or a wedge or trapezoid prism with a predetermined refractive index and a predetermined vertical angle is disposed in an optical path between the deflecting unit and the projection screen, thereby excellently correcting image distortion that occurs when scanning a light beam.

摘要翻译： 在包括使用反复操作预定的反射镜面以二维扫描光束的偏转单元在投影屏幕上投影和显示二维图像的功能的扫描图像显示装置中，不可避免地发生大的图像失真， 这是由反射镜表面反射和二维地进行偏转而引起的。 为了解决这个问题，在偏转单元和投影屏幕之间的光路中设置具有预定折射率和预定垂直角的自由曲面透镜或楔形或梯形棱镜，从而极好地校正图像失真， 发生在扫描光束时。

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：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：US20120051204A1

公开(公告)日：2012-03-01

申请号：US13070960

申请日：2011-03-24

申请人： Kunikazu OHNISHI ,  Kazuyoshi YAMAZAKI ,  Mitsuru NAGASAWA

发明人： Kunikazu OHNISHI ,  Kazuyoshi YAMAZAKI ,  Mitsuru NAGASAWA

IPC分类号： G11B7/135

CPC分类号： G11B7/094 ,  G11B7/0912 ,  G11B7/1381

摘要： An optical pickup compatible with two wavelengths such as an optical pickup having a two-wavelength, multi-laser source unit to be compatible with both DVDs and CDs prevents, in a simply structured optical system, error signal quality deterioration caused by relative shifting between laser beams and realizes detection of focus and tracking error signals. The optical system is provided with an optical waveguide device and a photodetector. The optical waveguide device includes a holographic diffraction grating having three regions divided by two approximately parallel division lines which extend respectively passing the optical axes of a laser beam for DVD and a laser beam for CD. The photodetector has plural light receiving surfaces each divided into three regions. This allows reliable focus and tracking error signals to be detected during both DVD reproduction and CD reproduction.

摘要翻译： 与两个波长兼容的光学拾取器，例如具有与DVD和CD兼容的双波长多激光源单元的光学拾取器，在简单结构的光学系统中防止由激光器之间的相对移动引起的误差信号质量劣化 实现对焦和跟踪误差信号的检测。 光学系统设置有光波导装置和光电检测器。 光波导器件包括具有三个区域的三维区域的全息衍射光栅，该区域被分别延伸通过DVD的激光束的光轴和CD的激光束的两个近似平行的分割线分开。 光电检测器具有分成三个区域的多个光接收表面。 这允许在DVD再现和CD再现期间检测可靠的对焦和跟踪误差信号。

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。