-
11.发明授权Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sources 有权光学检测器，光学拾取器和光学信息再现装置，其使用光学拾取器来检测从一个或多个光源分离的至少三个光束公开(公告)号：US06778475B2
公开(公告)日：2004-08-17
申请号：US10294943
申请日：2002-11-15
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
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。
-
公开(公告)号：US08891147B2
公开(公告)日：2014-11-18
申请号：US13479492
申请日：2012-05-24
申请人： Kunikazu Ohnishi
发明人： Kunikazu Ohnishi
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。
-
14.发明授权Optical information processing device and tracking control method thereof for use with grooveless multilayer optical disc 失效光信息处理装置及其与无槽多层光盘一起使用的跟踪控制方法公开(公告)号：US08644120B2
公开(公告)日：2014-02-04
申请号：US13478199
申请日：2012-05-23
申请人： Kunikazu Ohnishi
发明人： Kunikazu Ohnishi
CPC分类号： G11B7/0903 , G11B7/0906 , G11B7/0938 , G11B7/2405 , G11B2007/0013
摘要： An optical information device used with a grooveless multilayer disc including multiple recording layers used to record and reproduce information signals and a guide layer dedicated to detect tracking error signals (TES) can always stably detect the TESs when the distance between the recording layer and guide layer varies due to selection of a target recording layer. For example, a plurality of light spots for detecting the TESs are formed by a holographic grating on the guide layer, but are defocused with respect to each other. The TESs are detected individually from the respective light spots. The TESs are subjected to an addition operation to be a signal for tracking control, thereby extraordinarily increasing the defocus dynamic range of the TESs.
摘要翻译： 与包括用于记录和再现信息信号的多个记录层的无槽多层盘一起使用的光学信息装置和专用于检测跟踪误差信号（TES）的引导层可以在记录层和引导层之间的距离时始终稳定地检测TES 由于目标记录层的选择而变化。 例如，用于检测TES的多个光点由引导层上的全息光栅形成，但彼此散焦。 从相应的光点分别检测TES。 TES作为追踪控制的信号进行加法运算，从而极大地提高了TES的散焦动态范围。
-
公开(公告)号：US08072850B2
公开(公告)日：2011-12-06
申请号：US12355715
申请日：2009-01-16
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/0033 , G11B7/0917 , G11B7/0945 , G11B2007/0013
摘要： A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and the residual aberration in the optical system. The spherical aberration and defocus are coarsely adjusted using the amplitude (PP amplitude) of the tracking error signal and then finely adjusted using the amplitude (RF amplitude) of the readout signal. Since the spherical aberration can properly be adjusted, it is possible to raise the reliability of the readout signal.
摘要翻译： 不管读出信号检测器的位置误差和光学系统中的残余像差如何，允许可重写光盘装置，光学信息记录和再现装置等将光学系统自动且适当地调整到最佳焦点状态。 使用跟踪误差信号的振幅（PP振幅）粗略调整球面像差和散焦，然后使用读出信号的振幅（RF幅度）进行微调。 由于可以适当地调节球面像差，所以可以提高读出信号的可靠性。
-
公开(公告)号：US07965594B2
公开(公告)日：2011-06-21
申请号：US12826827
申请日：2010-06-30
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/0912 , G11B7/0943 , G11B2007/0013
摘要： When recording/reproducing an optical disc having a recording layer of multi-layer structure, an unwanted optical beam reflected from a recording layer other than a target layer for recording/reproduction is incident on a photodetector to cause an unwanted disturbance component to leak to a detection signal, giving rise to a degradation in the quality of a tracking control signal. In an optical pickup apparatus, for suppression of the degradation, an optical element is mounted having a diffraction area for diffracting part of the optical beam and light receiving planes for sub-optical beams are provided each of which has a light shielding zone or dead zone of a predetermined width on its central sectioning line.
摘要翻译： 当记录/再现具有多层结构的记录层的光盘时，从用于记录/再现的目标层以外的记录层反射的不需要的光束入射到光电检测器上，以使不需要的干扰成分泄漏到 检测信号，导致跟踪控制信号的质量下降。 在用于抑制劣化的光学拾取装置中，安装具有用于衍射光束的一部分的衍射区域的光学元件，并且每个具有遮光区域或死区的子光束的光接收平面 在其中心切片线上具有预定宽度。
-
公开(公告)号：US20100226229A1
公开(公告)日：2010-09-09
申请号：US12608121
申请日：2009-10-29
CPC分类号： G11B7/0917 , G11B7/0916 , G11B2007/0013
摘要： In a multilayer disc has an increased number of recording layers) spaced by spacing from each other, a generation interval between focus error (FE) signals detected from the respective recording layers becomes small. This causes mutual interference between the FE signals and a resulting undesired offset and the like in the signals, leading to a significantly deteriorated quality of the FE signals. To avoid this, in an optical pickup device according to the present invention, detection surfaces are newly added at positions adjacent to the FE signal detection surfaces, a predetermined detection signal obtained from the newly-added detection surfaces is multiplied by a predetermined coefficient value depending on the spacing between the recording layers, and the multiplied signal is subtracted from the original FE signal. As a result, mutual interference between the FE signals can be remarkably reduced.
摘要翻译： 在多层盘中具有增加数量的记录层），间隔彼此间隔，从各个记录层检测到的聚焦误差（FE）信号之间的产生间隔变小。 这导致FE信号之间的相互干扰和信号中产生的不期望的偏移等，导致FE信号的质量显着劣化。 为了避免这种情况，在根据本发明的光学拾取装置中，在与FE信号检测表面相邻的位置处新添加检测表面，将从新添加的检测表面获得的预定检测信号乘以预定系数值取决于 在记录层之间的间隔上，并且从原始FE信号中减去相乘的信号。 结果，可以显着地减少FE信号之间的相互干扰。
-
18.发明授权公开(公告)号：US07697394B2
公开(公告)日：2010-04-13
申请号：US11905527
申请日：2007-10-02
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：US20080031100A1
公开(公告)日：2008-02-07
申请号：US11905527
申请日：2007-10-02
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.
-
公开(公告)号：US07327661B2
公开(公告)日：2008-02-05
申请号：US10687910
申请日：2003-10-20
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.
-
-
-
-
-
-
-
-
-
搜索结果
66 条记录 (耗时 0.018 秒)
