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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。
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2.发明申请公开(公告)号：US20120300602A1
公开(公告)日：2012-11-29
申请号：US13478199
申请日：2012-05-23
申请人： Kunikazu OHNISHI
发明人： Kunikazu OHNISHI
IPC分类号： G11B7/09
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 extraordinary 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。 将TES作为追加控制的信号进行加法运算，从而非常增加TES的散焦动态范围。
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公开(公告)号：US20100034071A1
公开(公告)日：2010-02-11
申请号：US12417037
申请日：2009-04-02
申请人： Kunikazu OHNISHI
发明人： Kunikazu OHNISHI
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B2007/0013
摘要： Undesired disturbance components leak eventually into various detection signals and reproduction signals as stray optical beams reflected from recording layers other than a reproduction layer overlap with signal beams on a light reception surface of an optical detector and interference occurs between them when an optical disc having multi-layered recording layers is reproduced. A diffraction grating having a specific grating groove pattern is arranged immediately ahead of an optical detector or in a return optical path. Such optical unit averages the disturbance components resulting from interference between a signal beam and a stray beam and can satisfactorily improve influences of leak.
摘要翻译： 不期望的干扰分量最终会泄漏到各种检测信号和再现信号中，因为从再生层以外的记录层反射的杂散光束与光学检测器的光接收表面上的信号光束重叠，并且当具有多个光盘的光盘时， 复制分层记录层。 具有特定格栅凹槽图案的衍射光栅布置在光学检测器的正前方或者在返回光路中。 这样的光学单元平均化由信号光束和杂散光束之间的干涉导致的干扰分量，并且可以令人满意地改善泄漏的影响。
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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。
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公开(公告)号：US20120051204A1
公开(公告)日：2012-03-01
申请号：US13070960
申请日：2011-03-24
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。
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