公开(公告)号：US20060274417A1

公开(公告)日：2006-12-07

申请号：US11412305

申请日：2006-04-26

申请人： Yasunori Kanazawa ,  Makoto Horiyama

发明人： Yasunori Kanazawa ,  Makoto Horiyama

IPC分类号： G02B5/18

CPC分类号： G02B5/32 ,  G11B7/0943 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/13925

摘要： In order to realize a more stable recording/reproducing performance by minimizing decrease of light utilization efficiency, an optical integrated unit 1 of the present invention includes: (i) a semiconductor laser 11 for emitting a light beam 20 to an optical disk 4; (ii) a light receiving element 12 for receiving returning light, which is the light beam 20 reflected by the optical disk 4; (iii) a transparent element 15 for diffracting P polarization component light of the light beam 20 in a direction toward the optical disk 4, and for diffracting S polarization component light of the returning light in a direction toward the light receiving element; and (iv) a ¼ wavelength plate 16 that is provided on a portion, through which the returning light enters the transparent element 15, of the transparent element 15, and that converts the returning light into the S polarization component light.

摘要翻译： 为了通过最小化光利用效率的降低来实现更稳定的记录/再现性能，本发明的光学集成单元1包括：（i）用于将光束20发射到光盘4的半导体激光器11; （ii）用于接收由光盘4反射的光束20的返回光的光接收元件12; （iii）用于沿着朝向光盘4的方向衍射光束20的P偏振分量的光，并且用于沿着朝向光接收元件的方向衍射返回光的S偏振分量光的透明元件15; 和（iv）设置在透明元件15的返回光进入透明元件15的部分上的1/4波长板16，并将返回光转换成S偏振分量光。

公开(公告)号：US07616531B2

公开(公告)日：2009-11-10

申请号：US11509193

申请日：2006-08-23

申请人： Makoto Horiyama ,  Masaru Ogawa

发明人： Makoto Horiyama ,  Masaru Ogawa

IPC分类号： G11B7/00

CPC分类号： G11B7/22 ,  G11B7/0908 ,  G11B7/124 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1356

摘要： In an integrated optical unit of the present invention, a photo detector (12) and a holding member (17) that sustains a semiconductor laser (11) are provided on a polarizing beam splitter (14). This makes it possible to reduce a deviation from a designed value due to tolerance, and adjust a relative positional relationship between the semiconductor laser (11) and the photo detector (12). Therefore, returned light from an optical disk (4) is accurately adjusted with respect to a division line of a photo-detecting device (13). As a result, stable servo-control is realized, and an information signal with fine quality is obtained.

摘要翻译： 在本发明的集成光学单元中，在偏振分束器（14）上设置有光电检测器（12）和保持半导体激光器（11）的保持部件（17）。 这使得可以减小由于公差而偏离设计值，并且调整半导体激光器（11）和光电检测器（12）之间的相对位置关系。 因此，相对于光检测装置（13）的分割线精确地调整来自光盘（4）的返回光。 结果，实现了稳定的伺服控制，并且获得了具有良好质量的信息信号。

公开(公告)号：US20060102826A1

公开(公告)日：2006-05-18

申请号：US11270781

申请日：2005-11-08

申请人： Makoto Horiyama

发明人： Makoto Horiyama

IPC分类号： G02B27/40 ,  G02B27/64

CPC分类号： G11B7/1381 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/13927 ,  G11B7/1395 ,  G11B2007/0013

摘要： An optical pickup device includes: a separation section for separating a light beam into (i) a first light beam, which includes an optical axis of the light beam, and (ii) a second light beam, which surrounds a curved side of the first light beam; and a second light receiving section for receiving the light beam. The second light receiving section includes (I) main light receiving regions, which are provided with a division line therebetween so as to be adjacent to each other and (II) auxiliary light receiving regions, which receive a portion of the light beam which protrudes from each of the main light receiving regions. Each of the auxiliary light receiving regions is positioned in a direction orthogonal to a drawing direction of the division line so as to be adjacent to the main light receiving region. The auxiliary light receiving region is shorter than the main light receiving region in the drawing direction of the division line.

摘要翻译： 一种光学拾取装置，包括：分离部分，用于将光束分离成（i）包括光束的光轴的第一光束;以及（ii）第二光束，其围绕第一光束的弯曲侧 光束; 以及用于接收光束的第二光接收部分。 第二光接收部分包括（I）主光接收区域，它们之间设置有彼此相邻的分割线，以及（II）辅助光接收区域，其接收从 每个主要光接收区域。 每个辅助光接收区域位于与分割线的绘制方向正交的方向上，以便与主光接收区域相邻。 辅助光接收区域比分割线的拉制方向上的主光接收区域短。

公开(公告)号：US07715286B2

公开(公告)日：2010-05-11

申请号：US10517245

申请日：2003-06-20

申请人： Takahiro Miyake ,  Makoto Horiyama

发明人： Takahiro Miyake ,  Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/0945

摘要： An optical pickup (20) projects a read beam onto an optical disc (40) as an optical storage medium which is driven to rotate by a spindle motor (30) and receives its reflection. A laser beam from a laser producing element (21) passes through a liquid crystal panel (25) and guided to an objective lens (26). The panel (25) is provided to correct spherical aberration caused by an irregular thickness of a transparent substrate of the optical disc (40). A control circuit (50) changes a spherical aberration correction signal SA to carry out sampling more than once, covering a range of the output of an optical sensor (31) where the output shows large changes. The circuit (50) determines the position of a peak of an approximation curve through calculation and designates that position as the magnitude of correction. Thus, the optical pickup (20) can quickly and accurately detect the magnitude of the correction of the spherical aberration caused by an irregular thickness of the optical disc (40).

摘要翻译： 光学拾取器（20）将读取光束投射到作为光学存储介质的光盘（40）上，该光学存储介质被主轴电机（30）驱动旋转并接收其反射。 来自激光产生元件（21）的激光束通过液晶面板（25）并被引导到物镜（26）。 提供面板（25）以校正由光盘（40）的透明基板的不规则厚度引起的球面像差。 控制电路（50）改变球面像差校正信号SA以进行多次采样，覆盖输出显示较大变化的光学传感器（31）的输出范围。 电路（50）通过计算确定近似曲线的峰值的位置，并将该位置指定为校正的大小。 因此，光学拾取器（20）可以快速且准确地检测由光盘（40）的不规则厚度引起的球面像差校正的大小。

公开(公告)号：US20050030877A1

公开(公告)日：2005-02-10

申请号：US10647054

申请日：2003-08-21

申请人： Makoto Horiyama

发明人： Makoto Horiyama

IPC分类号： G11B7/08 ,  G02B5/18 ,  G11B7/00 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0906 ,  G11B7/094

摘要： An object of the invention is to provide a structure for suppressing occurrence of a track offset in a tracking control using DPP method, and simplified apparatus assembly adjustment. When a diffraction grating provided in an optical pick-up apparatus, diffracts light irradiated from a semiconductor laser at least into zero-order diffraction light and ± first-order diffraction light, disposed adjacent to diffraction area alternately in an extension direction of a grating groove, and an effective diameter of light beam with which the diffraction grating is irradiated is D, and a number of divisions into which the effective diameter D is divided is m (m is an integer of 3 or more), a width W1 and a width W2 are formed to meet W1=W2=D/m.

摘要翻译： 本发明的目的是提供一种用于抑制使用DPP方法的跟踪控制中的轨道偏移的发生的结构，以及简化的装置组装调整。 当设置在光学拾取装置中的衍射光栅时，将从半导体激光器照射的光至少衍射成在光栅槽的延伸方向上交替设置的与衍射区域相邻的零级衍射光和±一级衍射光 ，并且衍射光栅照射的光束的有效直径为D，分割有效直径D的分割数为m（m为3以上的整数），宽度W1和宽度 W2形成为满足W1 = W2 = D / m。

公开(公告)号：US07990816B2

公开(公告)日：2011-08-02

申请号：US11271914

申请日：2005-11-14

申请人： Shigeru Uchida ,  Yoshinori Kajiwara ,  Makoto Horiyama

发明人： Shigeru Uchida ,  Yoshinori Kajiwara ,  Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/08505

摘要： A conventional optical disk apparatus detects the amount of shift of an objective lens with a tracking error signal and an RF signal, and controls, when an optical pickup is moved, the shift amount for performing high-speed seek and high-speed access. The problem here is that this apparatus cannot be applied to an optical disk having an area where no RF signal is recorded, and requires higher costs. In view of this, an optical disk apparatus of the present invention has a shift signal detecting portion that detects a shift signal based on a push-pull signal generated during generation of a tracking error signal based on the reflected light resulting from a beam reflected from an optical disk, and a shift amount control portion that drives, when an optical pickup is moved, an objective lens actuator based on the shift signal detected by the shift signal detecting portion.

摘要翻译： 常规光盘装置利用跟踪误差信号和RF信号来检测物镜的偏移量，并且当光拾取器被移动时，控制用于执行高速寻道和高速存取的偏移量。 这里的问题在于，该装置不能应用于没有记录RF信号的区域的光盘，并且需要更高的成本。 鉴于此，本发明的光盘装置具有移位信号检测部，该移位信号检测部根据由反射光产生的反射光，基于在产生跟踪误差信号期间产生的推挽信号来检测移位信号 光盘，以及移位量控制部，其根据由移位信号检测部检测出的移位信号，驱动光拾取器移动时的物镜致动器。

公开(公告)号：US20070297731A1

公开(公告)日：2007-12-27

申请号：US11821043

申请日：2007-06-21

申请人： Makoto Horiyama

发明人： Makoto Horiyama

IPC分类号： G02B6/04

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/1374 ,  G11B7/13927 ,  G11B2007/0006

摘要： It is an object of the present invention to realize stable tracking control even in a structure including an objective lens whose center is offset from a central line extending from the central axis of an optical disk in the direction of the axis along which an optical pick-up is moved. An optical pick-up of the present invention includes a second optical system having (i) a light source for emitting a beam, (ii) a second diffraction grating for splitting, into three beams MB, SB1, and SB2, the beam emitted from the light source, (iii) a second objective lens for converging the three beams on an optical disk, and (iv) a photodetector for detecting a push-pull signal from reflected light obtained by reflecting the three beams. The second objective lens is placed in an offset position offset from a central line. The second diffraction grating has a lattice structure plane that gives a phase difference to a light beam passing through the second diffraction grating, and the lattice structure plane is designed so that the amplitude of a push-pull signal detected from reflected light obtained by reflecting SB1 and SB2 is substantially 0.

摘要翻译： 本发明的目的是即使在包括物镜的结构中​​也能实现稳定的跟踪控制，所述物镜的中心偏离从光盘的中心轴线延伸的中心线沿着轴的方向， 向上移动。 本发明的光拾取器包括第二光学系统，其具有（i）用于发射光束的光源，（ii）用于分割成三个光束MB，SB 1和SB 2的第二衍射光栅，所述光束 （iii）用于将三个光束会聚在光盘上的第二物镜，以及（iv）用于通过反射三个光束所获得的反射光检测推挽信号的光电检测器。 第二物镜放置在与中心线偏移的偏移位置。 第二衍射光栅具有对通过第二衍射光栅的光束产生相位差的晶格结构平面，并且设计晶格结构平面，使得从通过反射SB获得的反射光检测到的推挽信号的幅度 1和SB 2基本上为0。

公开(公告)号：US07197004B2

公开(公告)日：2007-03-27

申请号：US10647054

申请日：2003-08-21

申请人： Makoto Horiyama

发明人： Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0906 ,  G11B7/094

摘要： An object of the invention is to provide a structure for suppressing occurrence of a track offset in a tracking control using DPP method, and simplified apparatus assembly adjustment. When a diffraction grating provided in an optical pick-up apparatus, diffracts light irradiated from a semiconductor laser at least into zero-order diffraction light and ± first-order diffraction light, disposed adjacent to diffraction area alternately in an extension direction of a grating groove, and an effective diameter of light beam with which the diffraction grating is irradiated is D, and a number of divisions into which the effective diameter D is divided is m (m is an integer of 3 or more), a width W1 and a width W2 are formed to meet W1=W2=D/m.

摘要翻译： 本发明的目的是提供一种用于抑制使用DPP方法的跟踪控制中的轨道偏移的发生的结构，以及简化的装置组装调整。 当设置在光学拾取装置中的衍射光栅时，将从半导体激光器照射的光至少衍射成在光栅槽的延伸方向上交替设置的与衍射区域相邻的零级衍射光和±一级衍射光 ，衍射光栅照射的光束的有效直径为D，分割有效直径D的分割数为m（m为3以上的整数），宽度W 1和 宽度W 2形成为满足W 1 = W 2 = D / m。

公开(公告)号：US20070104046A1

公开(公告)日：2007-05-10

申请号：US11592045

申请日：2006-11-01

申请人： Makoto Horiyama

发明人： Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1392 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1398

摘要： In order to (i) reduce astigmatism due to a diffraction grating capable of compensating light intensity distribution of a light beam emitted by a light source and (ii) simplify fabrication processes, an optical pickup device of the present invention includes: a semiconductor laser 1; a collimator lens 4; a diffraction grating 3 capable of changing light intensity distribution of a light beam emitted by the semiconductor laser 1; a polarizing beam splitter 5 for causing a laser beam reflected by an optical disc 8 to be directed in a direction different from a direction of the light beam emitted by the semiconductor laser 1; and a parallel plate 2 for compensating astigmatism due to the diffraction grating 3, the parallel plate 2 being provided between the semiconductor laser 1 and the collimator lens 4 so as to be inclined to an optical axis of the semiconductor laser 1.

摘要翻译： 为了（i）减少由于能够补偿由光源发射的光束的光强度分布的衍射光栅而产生的像散，以及（ii）简化制造工艺，本发明的光学拾取装置包括：半导体激光器1 ; 准直透镜4; 能够改变由半导体激光器1发射的光束的光强度分布的衍射光栅3; 用于使由光盘8反射的激光束沿与半导体激光器1发射的光束的方向不同的方向引导的偏振分束器5; 以及用于补偿由于衍射光栅3引起的散光的平行板2，平行板2设置在半导体激光器1和准直透镜4之间，以便与半导体激光器1的光轴倾斜。

公开(公告)号：US20060109758A1

公开(公告)日：2006-05-25

申请号：US11271914

申请日：2005-11-14

申请人： Shigeru Uchida ,  Yoshinori Kajiwara ,  Makoto Horiyama

发明人： Shigeru Uchida ,  Yoshinori Kajiwara ,  Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/08505

摘要： A conventional optical disk apparatus detects the amount of shift of an objective lens with a tracking error signal and an RF signal, and controls, when an optical pickup is moved, the shift amount for performing high-speed seek and high-speed access. The problem here is that this apparatus cannot be applied to an optical disk having an area where no RF signal is recorded, and requires higher costs. In view of this, an optical disk apparatus of the present invention has a shift signal detecting portion that detects a shift signal based on a push-pull signal generated during generation of a tracking error signal based on the reflected light resulting from a beam reflected from an optical disk, and a shift amount control portion that drives, when an optical pickup is moved, an objective lens actuator based on the shift signal detected by the shift signal detecting portion.

摘要翻译： 常规光盘装置利用跟踪误差信号和RF信号来检测物镜的偏移量，并且当光拾取器被移动时，控制用于执行高速寻道和高速存取的偏移量。 这里的问题在于，该装置不能应用于没有记录RF信号的区域的光盘，并且需要更高的成本。 鉴于此，本发明的光盘装置具有移位信号检测部，该移位信号检测部根据由反射光产生的反射光，基于在产生跟踪误差信号期间产生的推挽信号来检测移位信号 光盘，以及移位量控制部，其根据由移位信号检测部检测出的移位信号，驱动光拾取器移动时的物镜致动器。