公开(公告)号：US06510119B2

公开(公告)日：2003-01-21

申请号：US09727521

申请日：2000-12-04

Applicant: Nobuo Takeshita ,  Mitsuru Irie ,  Toru Yoshihara

Inventor： Nobuo Takeshita ,  Mitsuru Irie ,  Toru Yoshihara

IPC: G11B7135

CPC classification number: G11B7/127 ,  G11B7/126 ,  G11B7/1356 ,  G11B2007/0006

Abstract: A light source (1) is composed of a single element having a light emitting point (2S) emitting a light (3S) and a light emitting point (2L) emitting a light (3L) at a longer wavelength than the light (3S), the light emitting point (2S) and the light emitting point (2L) being formed monolithically. In the direction parallel to the optical axis of a collimator lens (6), the light emitting point (2S) is placed closer, than the light emitting point (2L), to the collimator lens (6) and is placed on the side of the inclined plane (7a) of the beam shaping prism (7). The incidence angles of the light (3S) and the light (3L) to the inclined plane (7a) are set so that the incidence angle of the light (3S) is larger than that of the light (3L) and so that the lights (3S) and (3L) exit from the inclined plane (7a) at equal exit angles. The collimator lens (6), the beam shaping prism (7), etc. have refractive indexes which become larger as the wavelength of incident light becomes shorter. It is then possible to simplify the structure and reduce the unstableness of operation caused by a difference in light wavelength.

公开(公告)号：US5416756A

公开(公告)日：1995-05-16

申请号：US971233

申请日：1992-11-04

Applicant: Nobuo Takeshita ,  Hideaki Kobachi ,  Mitsuru Irie ,  Morihiro Karaki

Inventor： Nobuo Takeshita ,  Hideaki Kobachi ,  Mitsuru Irie ,  Morihiro Karaki

IPC: G11B7/085 ,  G11B7/00

CPC classification number: G11B7/08505

Abstract: A lens actuating system for an optical disk drive has an objective lens movably mounted in a movable frame with orthogonal X-, Y-, and Z-axes. A seeking servo moves the frame in the X-direction. A tracking servo moves the objective lens in the X-direction. A focusing servo moves the objective lens in the Z-direction. An optoelectronic sensor detects the relative position of the objective lens and frame in the X-direction, so that the tracking servo can maintain a fixed relative position during track-seeking, or in the Z-direction, to establish a neutral point on the Z-axis for the focusing servo. Force applied by the focusing servo or tracking servo to move the objective lens in one direction can be opposed by an equal and opposite force applied to a driven mass, so that a net zero force is transmitted to the frame.

Abstract translation: 用于光盘驱动器的镜头致动系统具有可移动地安装在具有正交X，Y和Z轴的可移动框架中的物镜。 寻求伺服器在X方向上移动框架。 跟踪伺服在X方向移动物镜。 聚焦伺服将物镜沿Z方向移动。 光电传感器在X方向上检测物镜和镜架的相对位置，使得跟踪伺服器可以在寻轨期间或在Z方向上保持固定的相对位置，以在Z上建立中性点 轴用于聚焦伺服。 通过聚焦伺服或跟踪伺服施加的力在一个方向上移动物镜可以通过施加到从动质量上的相等和相反的力相对，从而净零力传递到框架。

公开(公告)号：US5687032A

公开(公告)日：1997-11-11

申请号：US592178

申请日：1996-01-26

Applicant: Nobuo Takeshita ,  Teruo Fujita ,  Morihiro Karaki ,  Mitsuru Irie ,  Kazuhiko Nakane ,  Kenjiro Kime ,  Hideaki Kobachi

Inventor： Nobuo Takeshita ,  Teruo Fujita ,  Morihiro Karaki ,  Mitsuru Irie ,  Kazuhiko Nakane ,  Kenjiro Kime ,  Hideaki Kobachi

IPC: G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B7/13 ,  G11B7/135 ,  G11B7/14 ,  G11B7/22 ,  G02B7/02

CPC classification number: G11B7/133 ,  G11B7/00718 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/094 ,  G11B7/0948 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1381 ,  G11B7/14 ,  G11B7/22 ,  G11B7/0909

Abstract: An optical device inclination angle adjuster for adjusting an optical axis of an optical device. The optical device has an optical axis and a peripheral portion, and is held by a holder. The adjuster includes an annular plate inserted between the optical device and the holder. The annular plate is in alignment with the peripheral portion of the optical device, and has an opening with an axis in alignment with the optical axis of the optical device to permit passage of light through the opening of the annular plate and through the optical device. A first pair of projections are formed between the annular plate and the optical device. The first pair of projections are disposed diametrically opposite to each other with respect to the optical axis and project in a direction parallel to the optical axis. A second pair of projections are formed between the annular plate and the holder. The second pair of projections are disposed diametrically opposite to each other with respect to the optical axis and project in a direction parallel to the optical axis. The first pair of projections and the second pair of projections are disposed at different rotary angles about the optical axis; whereby the inclination angle is adjusted by rotating the optical device about the first pair of projections or about the second pair of projections.

Abstract translation: 一种用于调节光学装置的光轴的光学装置倾斜角度调节器。 光学装置具有光轴和周边部分，并由保持器保持。 调节器包括插入在光学装置和保持器之间的环形板。 环形板与光学装置的周边部分对准，并且具有与光学装置的光轴对准的轴线的开口，以允许光通过环形板的开口并通过光学装置。 第一对突起形成在环形板和光学装置之间。 第一对突起相对于光轴彼此沿径向相对设置，并且在平行于光轴的方向上突出。 第二对突起形成在环形板和支架之间。 第二对突起相对于光轴彼此沿径向相对设置，并且沿与光轴平行的方向突出。 第一对突起和第二对突起以围绕光轴的不同旋转角设置; 由此通过围绕第一对突起或围绕第二对突起旋转光学装置来调节倾斜角度。

公开(公告)号：US5511048A

公开(公告)日：1996-04-23

申请号：US361478

申请日：1994-12-22

Applicant: Mitsuru Irie ,  Takeshi Utakouji ,  Morihiro Karaki ,  Nobuo Takeshita ,  Manabu Koike ,  Yasuyuki Satou ,  Naoyuki Egusa ,  Masahisa Shinoda ,  Akira Ishimori ,  Akihiro Shima ,  Shigenori Yagi

Inventor： Mitsuru Irie ,  Takeshi Utakouji ,  Morihiro Karaki ,  Nobuo Takeshita ,  Manabu Koike ,  Yasuyuki Satou ,  Naoyuki Egusa ,  Masahisa Shinoda ,  Akira Ishimori ,  Akihiro Shima ,  Shigenori Yagi

IPC: G11B11/10 ,  G11B7/125 ,  G11B11/105 ,  G11B11/00

CPC classification number: G11B7/125 ,  G11B11/10504 ,  G11B11/10532 ,  G11B11/10595

Abstract: The second harmonic wave of a solid laser light which is emitted from a second harmonic wave light source is divided into a plurality of laser beams by a diffraction grating. The divided laser beams are converged on a record carrier into a plurality of light spots by an optical head. Magnetic field generating coils for applying magnetic fields to the respective light spots in accordance with the recording signals from a signal line are disposed under the record carrier. Part of the solid laser light is reflected and input to a beam splitter. Since part of the light input to the beam splitter is taken out, a stabilizer controls the output of the solid laser light from the second harmonic wave light source, parallel recording/reproduction using the plurality of light spots which are arranged on the record carrier is enabled and the formation of the plurality of light spots is effectively controlled. Thus, a magneto-optical recording and reproducing apparatus which is capable of high-density recording and high-speed data transfer, which supplies a stable and accurate optical output, and which facilitates the control of the optical output is provided.

Abstract translation: 从二次谐波光源发射的固体激光的二次谐波通过衍射光栅被分成多个激光束。 分割的激光束通过光学头被会聚在记录载体上成多个光点。 根据来自信号线的记录信号将磁场施加到各个光点的磁场产生线圈设置在记录载体下方。 固体激光的一部分被反射并输入到分束器。 由于输入到分束器的光的一部分被取出，所以稳定器控制来自二次谐波光源的固体激光的输出，使用布置在记录载体上的多个光点进行并行记录/再现 并且有效地控制多个光点的形成。 因此，提供了能够进行高密度记录和高速数据传送的磁光记录和再现装置，其提供稳定且准确的光输出，并且有助于光输出的控制。

公开(公告)号：US5479386A

公开(公告)日：1995-12-26

申请号：US312086

申请日：1994-09-26

Applicant: Nobuo Takeshita ,  Hideaki Kobachi ,  Mitsuru Irie ,  Morihiro Karaki

Inventor： Nobuo Takeshita ,  Hideaki Kobachi ,  Mitsuru Irie ,  Morihiro Karaki

IPC: G11B7/085 ,  G11B7/00

CPC classification number: G11B7/08505

Abstract: A lens actuating system for an optical disk drive has an objective lens movably mounted in a movable frame with orthogonal X-, Y-, and Z-axes. A seeking servo moves the frame in the X-direction. A tracking servo moves the objective lens in the X-direction. A focusing servo moves the objective lens in the Z-direction. An optoelectronic sensor detects the relative position of the objective lens and frame in the X-direction, so that the tracking servo can maintain a fixed relative position during track-seeking, or in the Z-direction, to establish a neutral point on the Z-axis for the focusing servo. Force applied by the focusing servo or tracking servo to move the objective lens in one direction can be opposed by an equal and opposite force applied to a driven mass, so that a net zero force is transmitted to the frame.

Abstract translation: 用于光盘驱动器的镜头致动系统具有可移动地安装在具有正交X，Y和Z轴的可移动框架中的物镜。 寻求伺服器在X方向上移动框架。 跟踪伺服在X方向移动物镜。 聚焦伺服将物镜沿Z方向移动。 光电传感器在X方向上检测物镜和镜架的相对位置，使得跟踪伺服器可以在寻轨期间或在Z方向上保持固定的相对位置，以在Z上建立中性点 轴用于聚焦伺服。 通过聚焦伺服或跟踪伺服施加的力在一个方向上移动物镜可以通过施加到从动质量上的相等和相反的力相对，从而净零力传递到框架。

公开(公告)号：US20070025210A1

公开(公告)日：2007-02-01

申请号：US10574510

申请日：2005-05-26

Applicant: Tomo Kishigami ,  Yoshihiro Kiyose ,  Nobuo Takeshita ,  Toru Yoshihara ,  Masaharu Ogawa

Inventor： Tomo Kishigami ,  Yoshihiro Kiyose ,  Nobuo Takeshita ,  Toru Yoshihara ,  Masaharu Ogawa

IPC: G11B7/12

CPC classification number: G11B7/1267 ,  G11B7/00736 ,  G11B7/0953 ,  G11B7/24038 ,  G11B2007/0013

Abstract: An optical disc on which information can be recorded by recording light has a first recording layer (102) and a second recording layer (103) disposed behind the first recording layer as viewed by the recording light; the first recording layer and the second recording layer have respective power adjustment areas (P1, P2) that are used to adjust the power of the recording light to the optimal recording power at the time of recording of information on each recording layer; a prewrite area (PW) is provided in correspondence to the power adjustment area (P2) used for optimal power adjustment in the second recording layer and restricted areas (A1, A2) on both sides of that power adjustment area (P2). The restricted areas (A1, A2) allow for the diameter of the recording light beam and for lamination misalignment. This configuration enables stable test recording to be carried out in a short time on an optical disc having multiple recording layers.

Abstract translation: 通过记录光能够记录信息的光盘具有由记录光所观察的设置在第一记录层后面的第一记录层（102）和第二记录层（103） 第一记录层和第二记录层具有各自的功率调整区域（P 1，P 2），用于在记录每个记录层上的信息时将记录光的功率调节到最佳记录功率; 对应于用于第二记录层中的最佳功率调整的功率调整区域（P 2）和在该功率调整区域（P 2）的两侧的限制区域（A 1，A 2），提供预写区域（PW） ）。 限制区域（A 1，A 2）允许记录光束的直径和层压未对准。 该配置使得能够在具有多个记录层的光盘上在短时间内进行稳定的测试记录。

公开(公告)号：US07447130B2

公开(公告)日：2008-11-04

申请号：US10574510

申请日：2005-05-26

Applicant: Tomo Kishigami ,  Yoshihiro Kiyose ,  Nobuo Takeshita ,  Toru Yoshihara ,  Masaharu Ogawa

Inventor： Tomo Kishigami ,  Yoshihiro Kiyose ,  Nobuo Takeshita ,  Toru Yoshihara ,  Masaharu Ogawa

IPC: G11B7/00

CPC classification number: G11B7/1267 ,  G11B7/00736 ,  G11B7/0953 ,  G11B7/24038 ,  G11B2007/0013

Abstract: An optical disc on which information can be recorded by recording light has a first recording layer (102) and a second recording layer (103) disposed behind the first recording layer as viewed by the recording light; the first recording layer and the second recording layer have respective power adjustment areas (P1, P2) that are used to adjust the power of the recording light to the optimal recording power at the time of recording of information on each recording layer; a prewrite area (PW) is provided in correspondence to the power adjustment area (P2) used for optimal power adjustment in the second recording layer and restricted areas (A1, A2) on both sides of that power adjustment area (P2). The restricted areas (A1, A2) allow for the diameter of the recording light beam and for lamination misalignment. This configuration enables stable test recording to be carried out in a short time on an optical disc having multiple recording layers.

Abstract translation: 通过记录光能够记录信息的光盘具有由记录光所观察的设置在第一记录层后面的第一记录层（102）和第二记录层（103） 第一记录层和第二记录层具有各自的功率调整区域（P 1，P 2），用于在记录每个记录层上的信息时将记录光的功率调节到最佳记录功率; 对应于用于第二记录层中的最佳功率调整的功率调整区域（P 2）和在该功率调整区域（P 2）的两侧的限制区域（A 1，A 2），提供预写区域（PW） ）。 限制区域（A 1，A 2）允许记录光束的直径和层压未对准。 该配置使得能够在具有多个记录层的光盘上在短时间内进行稳定的测试记录。

公开(公告)号：US08787137B2

公开(公告)日：2014-07-22

申请号：US13978160

申请日：2012-01-17

Applicant: Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

Inventor： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC: G11B7/135

CPC classification number: G11B7/13927 ,  G11B7/1362 ,  G11B7/1376 ,  G11B2007/0013

Abstract: An optical pickup device includes a laser light source 201, a collimating optical system 202 for converting laser light to parallel light, a focusing optical system 205 for focusing the parallel light onto an optical disc, a light detection unit for receiving returning light returning by reflection of the focused light from the optical disc 101 and outputting a detection signal, and a reflecting mirror 204 disposed between the collimating optical system and the focusing optical system. The reflecting mirror 204 has a reflective surface including three regions having different reflectances. The central region on the reflecting surface meets the other two regions, at positions illuminated by the light focused by the light focusing optical system, in boundary lines that are parallel to a radial direction on the optical disc 101. The reflectance of the central region is lower than the reflectances of the other two regions.

Abstract translation: 光拾取装置包括激光源201，用于将激光转换为平行光的准直光学系统202，用于将平行光聚焦到光盘上的聚焦光学系统205，用于接收通过反射返回的返回光的光检测单元 来自光盘101的聚焦光并输出检测信号，反射镜204设置在准直光学系统和聚焦光学系统之间。 反射镜204具有包括具有不同反射率的三个区域的反射表面。 反射表面上的中心区域与由光聚焦光学系统聚焦的光照射的位置处在与光盘101上的径向平行的边界线处的另外两个区域相交。中心区域的反射率为 低于其他两个地区的反射率。

公开(公告)号：US20130044576A1

公开(公告)日：2013-02-21

申请号：US13642856

申请日：2010-12-15

Applicant: Yusuke Kanatake ,  Tomo Kishigami ,  Toshiya Matozaki ,  Nobuo Takeshita

Inventor： Yusuke Kanatake ,  Tomo Kishigami ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC: G11B7/1392

CPC classification number: G11B7/0945 ,  G11B7/08511 ,  G11B7/13925 ,  G11B2007/0013

Abstract: An optical recording/reproduction method and device that can perform control for optimizing the amount of spherical aberration in a multilayered optical disc in a short period of time. When the objective lens is displaced in the focusing direction, the amplitude value of the focusing error signal detected just after leaving the focal position of a given first recording layer and the amplitude value of the focusing error signal detected just before passing through the focal position of a given second recording layer other than the first recording layer are measured with a particular spherical aberration, the amplitude ratio of amplitude values is calculated, the difference between spherical aberration and the optimal spherical aberration for the second recording layer is approximated as a function of the amplitude ratio, the optimal spherical aberration is calculated on the basis of this approximation, and the spherical aberration is set.

Abstract translation: 一种能够在短时间内对多层光盘中的球面像差的量进行优化的光记录再现方法和装置。 当物镜在聚焦方向上移位时，恰好在离开给定第一记录层的焦点位置之后检测到的聚焦误差信号的振幅值和刚刚通过焦点位置之前检测到的聚焦误差信号的振幅值 以特定的球面像差测量除了第一记录层之外的给定的第二记录层，计算振幅值的幅度比，将第二记录层的球面像差和最佳球面差之差近似为 基于该近似值计算最佳球面像差，并设置球面像差。

公开(公告)号：US20120106310A1

公开(公告)日：2012-05-03

申请号：US13380791

申请日：2011-01-17

Applicant: Masahisa Shinoda ,  Hironori Nakahara ,  Masayuki Omaki ,  Kenya Nakai ,  Nobuo Takeshita

Inventor： Masahisa Shinoda ,  Hironori Nakahara ,  Masayuki Omaki ,  Kenya Nakai ,  Nobuo Takeshita

IPC: G11B7/1353 ,  G11B7/1374

CPC classification number: G11B7/0903 ,  G11B7/094 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/13925 ,  G11B7/1395 ,  G11B2007/0013

Abstract: An optical head device mounted in an optical disc device. The optical head device is provided with a diffractive optical element and a photodetector. The diffractive optical element has: a primary diffraction region at a location on which the positive and negative first-order components and some of the zero-order component of a reflectively diffracted light beam are incident; and secondary diffraction regions at locations on which the rest of the zero-order component but none of the positive or negative first-order components of the reflectively diffracted light beam are incident. A main light-receiving section of the photodetector receives the zero-order component of a transmissively diffracted light beam that has passed through the primary diffraction region and the secondary diffraction regions. Secondary light-receiving sections receive the positive first-order component and/or the negative first-order component of the transmissively diffracted light beam that has passed through the secondary diffraction regions.

Abstract translation: 安装在光盘装置中的光学头装置。 光头装置设置有衍射光学元件和光电检测器。 衍射光学元件具有：反射衍射光束的正，负一阶分量和零级分量的一部分入射的位置处的主衍射区域; 以及零反射衍射光束的零级分量的其余部分而不是反射衍射光束的正或负一阶分量的位置处的次级衍射区域。 光检测器的主光接收部接收通过一次衍射区域和二次衍射区域的透射衍射光束的零级分量。 次级光接收部分接收通过次级衍射区域的透射衍射光束的正一级分量和/或负一级分量。