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    Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup
    4.
    发明授权
    Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup 失效
    短脉冲光源，激光发射方法，光学装置，光盘装置和光学拾取器

    公开(公告)号：US08149661B2

    公开(公告)日：2012-04-03

    申请号：US12734735

    申请日：2009-09-16

    申请人： Tsutomu Ishimoto ,  Kazuhiko Fujiie

    发明人： Tsutomu Ishimoto ,  Kazuhiko Fujiie

    IPC分类号： G11B20/10

    CPC分类号： H01S5/06216 ,  B82Y10/00 ,  G11B7/00736 ,  G11B7/127 ,  G11B7/1275 ,  G11B7/247 ,  G11B7/248 ,  G11B2007/24606 ,  H01S5/06835

    摘要： Directed to freely adjusting an emission period of a semiconductor laser.In the present invention, pulsed light serving as pulse-shaped laser light (LL) is emitted from a semiconductor laser (3), and a laser drive voltage (DJ) that is generated on the basis of a pulse signal (SL) and that has pulse-shaped drive voltage pulses (DJw) is applied to the semiconductor laser (3). At this time, a short-pulse light source (51) varies a voltage period (TV) corresponding to an interval between the drive voltage pulses (DJw), thereby varying a set period (TS) corresponding to an interval between generated signal pulses (SLw) in the pulse signal (SL).

    摘要翻译： 用于自由调节半导体激光器的发射周期。 在本发明中，从半导体激光器（3）和基于脉冲信号（SL）生成的激光驱动电压（DJ）发射用作脉冲激光（LL）的脉冲光，并且基于脉冲信号（SL）产生的激光驱动电压（DJ） 脉冲驱动电压脉冲（DJw）被施加到半导体激光器（3）。 此时，短脉冲光源（51）改变与驱动电压脉冲（DJw）之间的间隔对应的电压周期（TV），从而改变对应于所生成的信号脉冲之间的间隔的设定周期（TS） SLw）在脉冲信号（SL）中。

    Disk device and disk drive controlling method
    5.
    发明授权
    Disk device and disk drive controlling method 失效
    磁盘设备和磁盘驱动器控制方式

    公开(公告)号：US08031568B2

    公开(公告)日：2011-10-04

    申请号：US12606555

    申请日：2009-10-27

    申请人： Tsutomu Ishimoto

    发明人： Tsutomu Ishimoto

    IPC分类号： G11B20/00

    CPC分类号： G11B20/10009 ,  G11B20/10037 ,  G11B20/10222 ,  G11B20/10425 ,  G11B20/1403

    摘要： A disk device includes a main control unit controlling the operation of a controlled object on the basis of an error signal calculated from a target signal of the controlled object and an observation signal of the controlled object, a repetitive control unit sampling the error signal with a sampling clock pulse to obtain a repetitive signal component generated in synchronization with rotation of the disk medium from the sampled error signal, a sampling clock generation unit generating the sampling clock pulse and resetting a timing at which the sampling clock pulse is generated in accordance with a rotation detecting pulse and a sampling clock limit unit limiting generation of the sampling clock pulse at a timing immediately before generation of the rotation detecting pulse.

    摘要翻译： 磁盘装置包括主控制单元，其基于从受控对象的目标信号计算的误差信号和受控对象的观测信号来控制受控对象的操作;重复控制单元，用 采样时钟脉冲，以获得与采样误差信号的盘介质的旋转同步产生的重复信号分量;采样时钟产生单元，生成采样时钟脉冲，并根据一个采样时钟脉冲重新产生采样时钟脉冲的定时 旋转检测脉冲和采样时钟限制单元，在紧接在旋转检测脉冲的生成之前的定时限制采样时钟脉冲的产生。

    Optical pickup device, optical recording/reproducing apparatus and gap-control method
    6.
    发明授权
    Optical pickup device, optical recording/reproducing apparatus and gap-control method 失效
    光学拾取装置，光学记录/再现装置和间隙控制方法

    公开(公告)号：US07826317B2

    公开(公告)日：2010-11-02

    申请号：US12197581

    申请日：2008-08-25

    申请人： Tsutomu Ishimoto

    发明人： Tsutomu Ishimoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/0908 ,  G11B7/0912 ,  G11B7/1387 ,  G11B2007/13727

    摘要： An optical pickup device is provided. The optical pickup device includes a light source, a focusing optical system configured to irradiate an optical recording medium with near-field light, a light-detecting unit configured to detect a total-reflection return-light quantity from the optical recording medium, a control unit configured to generate a control signal in response to a detection signal supplied from the light-detecting unit, and a drive unit configured to drive the focusing optical system to a predetermined position above the optical recording medium. The control unit feeds forward a push-pull signal in a traveling direction of the drive unit relative to the optical recording medium to a gap-error signal supplied from the light-detecting unit to generate a gap-servo signal. The control unit includes a repetitive controller storing a predetermined number of the push-pull signals.

    摘要翻译： 提供一种光拾取装置。 光拾取装置包括光源，被配置为用光照射光学记录介质的近场光的聚焦光学系统，被配置为检测来自光学记录介质的全反射返回光量的光检测单元，控制 被配置为响应于从所述光检测单元提供的检测信号而产生控制信号的单元;以及驱动单元，被配置为将所述聚焦光学系统驱动到所述光学记录介质上方的预定位置。 控制单元将相对于光记录介质的驱动单元的行进方向的推挽信号向前馈送到从光检测单元提供的间隙误差信号，以产生间隙伺服信号。 控制单元包括存储预定数量的推挽信号的重复控制器。

    Optical disk drive using near-field light, optical disk apparatus, and method for driving the apparatus
    7.
    发明授权
    Optical disk drive using near-field light, optical disk apparatus, and method for driving the apparatus 失效
    使用近场光的光盘驱动器，光盘装置以及用于驱动该装置的方法

    公开(公告)号：US07394734B2

    公开(公告)日：2008-07-01

    申请号：US11436809

    申请日：2006-05-19

    申请人： Tsutomu Ishimoto

    发明人： Tsutomu Ishimoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/0938 ,  G11B7/08511 ,  G11B7/1387

    摘要： An optical disk drive includes a light source, a light focusing element, a light-focusing-element moving mechanism, a detecting unit, a holding unit, and first and second control units. The light focusing element arranged so as to be opposed to a disk on which a signal is recordable is capable of focusing light emitted from the light source as near-field light on the disk. The detecting unit detects a state where the moving mechanism approaches the light focusing element to the disk such that the light is focused as near-field light on the disk and outputs a detection signal upon detection. The holding unit holds a voltage applied to the mechanism in response to the detection signal and is capable of releasing the held voltage. The first and second control units perform first and second control operations to control the distance between the light focusing element and the disk.

    摘要翻译： 光盘驱动器包括光源，光聚焦元件，光聚焦元件移动机构，检测单元，保持单元以及第一和第二控制单元。 配置成与可记录信号的光盘相对的光聚焦元件能够将从光源发出的光作为近场光聚焦在光盘上。 检测单元检测移动机构接近光盘的光聚焦元件的状态，使得光被聚焦成盘上的近场光，并且在检测时输出检测信号。 保持单元响应于检测信号保持施加到机构的电压，并且能够释放保持的电压。 第一和第二控制单元执行第一和第二控制操作以控制光聚焦元件和盘之间的距离。

    Optical pickup device, recording and reproducing apparatus and gap detection method
    8.
    发明授权
    Optical pickup device, recording and reproducing apparatus and gap detection method 失效
    光学拾取装置，记录和再现装置以及间隙检测方法

    公开(公告)号：US07230902B2

    公开(公告)日：2007-06-12

    申请号：US10714866

    申请日：2003-11-18

    申请人： Kimihiro Saito ,  Tsutomu Ishimoto

    发明人： Kimihiro Saito ,  Tsutomu Ishimoto

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B27/283 ,  G11B7/09 ,  G11B7/1356 ,  G11B7/1381 ,  G11B7/1387 ,  G11B11/10532 ,  G11B11/10576 ,  G11B2007/13727

    摘要： An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL), the objective lens having a numerical aperture greater than 1, a beam splitter 102 for reflecting both of a p-polarized light component and an s-polarized light component of reflected lights from an optical recording medium when the optical pickup device irradiates the optical recording medium with a bundle of rays in a predetermined polarized state from a light source through the objective lens to detect a component in the polarized state perpendicular to the polarized state of reflected light obtained when a distance between the surface of this optical recording medium and the flat surface portion of the solid immersion lens (SIL) is zero to produce a signal corresponding to the distance between the surface of the optical recording medium and the flat surface portion of the solid immersion lens, a dividing means 110 for dividing incident light into a p-polarized light component and an s-polarized light component reflected by the beam splitter 102 and a photo-detecting means 120 for separately detecting the p-polarized light component and the s-polarized light component divided by the dividing means 110.

    摘要翻译： 光学拾取装置和光学记录和再现装置适用于近场光学记录和再现系统。 光学拾取装置包括由固体浸没透镜（SIL）构成的物镜，物镜的数值孔径大于1;分束器102，用于反射p偏振光分量和s偏振光分量 当光学拾取装置通过物镜从光源以预定的偏振态以一束光线照射光记录介质时，检测来自光记录介质的反射光，以检测垂直于偏振态的偏振态的分量 当该光学记录介质的表面与固体浸没透镜（SIL）的平坦表面部分之间的距离为零时获得的反射光产生对应于光学记录介质的表面与平面部分之间的距离的信号 的固体浸没透镜，用于将入射光分解成p偏振光分量和s-pol的分割装置110 由分束器102反射的光分量的光分量和用于分别检测由分割装置110分割的p偏振光分量和s偏振光分量的光检测装置120。

    Optical pickup device and recording/reproducing device
    9.
    发明授权
    Optical pickup device and recording/reproducing device 失效
    光学拾取装置和记录/再现装置

    公开(公告)号：US07106683B2

    公开(公告)日：2006-09-12

    申请号：US10415103

    申请日：2002-08-27

    申请人： Kimihiro Saito ,  Tsutomu Ishimoto

    发明人： Kimihiro Saito ,  Tsutomu Ishimoto

    IPC分类号： G11B7/135

    CPC分类号： G11B11/10576 ,  B82Y10/00 ,  G11B7/0908 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/139 ,  G11B2007/13727

    摘要： An optical pickup device includes an objective lens (2), with a numerical aperture (NA) being not less than 1, having a solid immersion lens (1) which is made up by a spherical portion (1a) and a flat portion (1b) parallel to a surface (101a) of an optical disc (101). The component of the reflected light from the optical disc in the polarized state perpendicular to the polarized state of the reflected light which prevails when the distance between the surface of the optical disc and the flat portion of the solid immersion lens is zero is detected. The so detected light intensity is associated with the distance between the optical disc surface and the solid immersion lens to accurately detect the minute gap between the optical disc and the solid immersion lens.

    摘要翻译： 一种光学拾取装置，包括数值孔径（NA）不小于1的物镜（2），具有由球形部分（1a）和平坦部分（1a）构成的固体浸没透镜（1） 1b）平行于光盘（101）的表面（101a）。 检测到当光盘的表面与固体浸没透镜的平坦部分之间的距离为零时，偏光状态下的偏振状态的偏振状态的反射光的分量是反射光的偏振状态。 所检测到的光强度与光盘表面和固体浸没透镜之间的距离相关联，以准确地检测光盘和固体浸没透镜之间的微小间隙。

    Optical drive device and focus servo control method
    10.
    发明授权
    Optical drive device and focus servo control method 失效
    光驱装置及聚焦伺服控制方式

    公开(公告)号：US08446802B2

    公开(公告)日：2013-05-21

    申请号：US12984755

    申请日：2011-01-05

    申请人： Tsutomu Ishimoto ,  Toshihiro Horigome

    发明人： Tsutomu Ishimoto ,  Toshihiro Horigome

    IPC分类号： G11B7/00 ,  G11B5/58 ,  G11B20/18 ,  G11B27/36 ,  G11B5/09 ,  G11B21/10

    CPC分类号： G11B7/0908 ,  G11B7/0065 ,  G11B7/00781 ,  G11B7/0938 ,  G11B7/1275 ,  G11B2007/0009

    摘要： An optical drive device includes first and second light sources, an objective lens configured to receive a first light emitted from the first light source and a second light emitted from the second light source and to irradiate both the first light and the second light to an optical disc recording medium, a first focus mechanism configured to drive the objective lens in a focus direction, a second focus mechanism configured to change collimation of the second light incident to the objective lens and changing the focusing position of the second light independently of the first light, a first focus servo control unit configured to drive the first focus mechanism, an error signal subtraction unit configured to subtract the first focus error signal from a second focus error signal, and a second focus servo control unit configured to drive the second focus mechanism.

    摘要翻译： 光驱装置包括第一和第二光源，物镜被配置为接收从第一光源发射的第一光和从第二光源发射的第二光，并将第一光和第二光照射到光学 光盘记录介质，被配置为在聚焦方向上驱动物镜的第一对焦机构，配置为改变入射到物镜的第二光的准直并且改变第二光的聚焦位置而与第一光不同的第二聚焦机构 配置为驱动第一聚焦机构的第一聚焦伺服控制单元，配置为从第二聚焦误差信号减去第一聚焦误差信号的误差信号减法单元和被配置为驱动第二聚焦机构的第二聚焦伺服控制单元。