公开(公告)号：US06741416B2

公开(公告)日：2004-05-25

申请号：US09736798

申请日：2000-12-14

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hajime Hatada ,  Ikuo Ohmura

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Hajime Hatada ,  Ikuo Ohmura

IPC分类号： G11B5596

CPC分类号： G11B5/5526 ,  G11B5/59677

摘要： A device and a method are provided in which stable tracking control can be carried out even in an arbitrary phase by optically reading pits provided in a disk when information is recorded on and reproduced from the disk with a magnetic head. With respect to difference signals obtained from a main beam signal and sub-beam signals obtained through three-beam type photodetectors, gain correction is executed in variable gain amplifiers, respectively, so that output signals therefrom have same amplitude levels and are different in phase by 90 degrees in a track crossing direction, and thus a tracking error signal is generated by being synthesized from the output signals. Based on the tracking error signal, tracking control is carried out.

摘要翻译： 提供了一种装置和方法，其中即使在磁盘上记录信息并从磁盘再现的情况下，即使在任意阶段也可以通过光学读取设置在盘中的凹坑来进行稳定的跟踪控制。 对于从主波束信号和通过三光束型光电检测器获得的子波束信号获得的差分信号，分别在可变增益放大器中执行增益校正，使得其输出信号具有相同的幅度电平并且在相位上不同 通过从输出信号合成，产生轨迹交叉方向90度的跟踪误差信号。 基于跟踪误差信号，进行跟踪控制。

公开(公告)号：USRE42825E1

公开(公告)日：2011-10-11

申请号：US11805282

申请日：2007-05-22

申请人： Shin-Ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

发明人： Shin-Ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0055 ,  G11B7/0903 ,  G11B2007/0013

摘要： An optical pickup head device includes a diffraction grating for generating zero-order diffracted light and at least first-order diffracted light and provides a tracking error signal with a DPP method. The diffraction grating includes grating patterns with a nonuniform period or phase. The size of the first-order diffracted light converged on an optical recording medium is larger in the direction parallel to a tangent to the track than in the direction perpendicular to the tangent. P1/P0>PW2/PW1 is established, where PW1 represents the power that is required to record information on the optical recording medium, PW2 represents the maximum power that allows information recorded on the optical recording medium to be reproduced without being erased, P0 represents the light amount of the zero-order diffracted light converged on the optical recording medium, and P1 represents the light amount of the at least first-order diffracted light converged on the optical recording medium. This configuration makes it possible to detect a tracking error signal with reduced offset, even if a recordable optical recording medium having two information recording planes is used.

摘要翻译： 光拾取头装置包括用于产生零级衍射光和至少一级衍射光的衍射光栅，并提供具有DPP方法的跟踪误差信号。 衍射光栅包括具有不均匀周期或相位的光栅图案。 会聚在光学记录介质上的一级衍射光的尺寸在平行于轨道的切线的方向上大于在垂直于切线的方向上的尺寸。 P1 / P0> PW2 / PW1，其中PW1表示在光学记录介质上记录信息所需的功率，PW2表示允许记录在光学记录介质上的信息被再现而不被擦除的最大功率，P0表示 零级衍射光的光量会聚在光学记录介质上，P1表示会聚在光学记录介质上的至少一级衍射光的光量。 该配置使得即使使用具有两个信息记录平面的可记录光学记录介质，也可以检测具有减小的偏移的跟踪误差信号。

公开(公告)号：US06980489B2

公开(公告)日：2005-12-27

申请号：US10421019

申请日：2003-04-21

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B5/584 ,  G11B5/78 ,  G11B5/82 ,  G11B7/09 ,  G11B11/105 ,  G11B15/60 ,  G11B11/00 ,  G11B7/24

CPC分类号： G11B15/602 ,  G11B5/584 ,  G11B5/78 ,  G11B5/82 ,  G11B7/0938 ,  G11B11/10578

摘要： A magnetic tape has a guide track for optically obtaining a tracking signal and an independent information track for storing information. The magnetic tape is partitioned into different kinds of zones. The guide tracks are provided with grooves or pits serving as tracking marks, and the tracking marks are selectively located in the zones depending on the kind of zone. Thus, the track spacing of the guide tracks in each zone can be increased, so that a tracking control can be performed for a high density recording medium without reducing the spot size of the light.

摘要翻译： 磁带具有用于光学获得跟踪信号的引导轨道和用于存储信息的独立信息轨迹。 磁带被分割成不同种类的区域。 引导轨道设置有用作跟踪标记的凹槽或凹坑，并且跟踪标记根据区域的种类选择性地位于区域中。 因此，可以增加每个区域中的导轨的轨道间隔，使得可以对高密度记录介质执行跟踪控制，而不会减小光的斑点尺寸。

公开(公告)号：US06810002B1

公开(公告)日：2004-10-26

申请号：US09481268

申请日：2000-01-11

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B724

CPC分类号： G11B15/602 ,  G11B5/584 ,  G11B5/78 ,  G11B5/82 ,  G11B7/0938 ,  G11B11/10578

摘要： A magnetic tape has a guide track for optically obtaining a tracking signal and an independent information track for storing information. The magnetic tape is partitioned into different kinds of zones. The guide tracks are provided with grooves or pits serving as tracking marks, and the tracking marks are selectively located in the zones depending on the kind of zone. Thus, the track spacing of the guide tracks in each zone can be increased, so that a tracking control can be performed for a high density recording medium without reducing the spot size of the light.

摘要翻译： 磁带具有用于光学获得跟踪信号的引导轨道和用于存储信息的独立信息轨迹。 磁带被分割成不同种类的区域。 引导轨道设置有用作跟踪标记的凹槽或凹坑，并且跟踪标记根据区域的种类选择性地位于区域中。 因此，可以增加每个区域中的导轨的轨道间隔，使得可以对高密度记录介质执行跟踪控制，而不会减小光的斑点尺寸。

公开(公告)号：US06327110B1

公开(公告)日：2001-12-04

申请号：US09045149

申请日：1998-03-19

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B700

CPC分类号： G11B5/59677 ,  G11B7/0901

摘要： For example, because an optical position detector for positioning a head for a high-density floppy disk is constituted so that openings 111 and 112 are used in which the thickness of a returning optical path bound for photodetectors 108R and 108L from a disk 107 is larger than the thickness of an advancing optical path bound for the disk 107 from a light source 101, a light beam is not easily interrupted in the middle of an optical path even if a light beam falls due to a tilt of the disk and therefore, it is possible to stably obtain position detection signals. Moreover, by reducing the luminous energy to be returned to a light source, it is possible to obtain a signal having less noises even if the distance between object images decreases and downsize an apparatus. In the case of a conventional optical position detector for positioning a head for a high-density floppy disk, a light beam is tilted due to a tilt of a disk and interrupted in its returning path because the numerical aperture of an optical system is small and the quality of a signal used for position detection is easily deteriorated. Moreover, when decreasing the distance between object images in order to downsize an apparatus, noises of a light source increase and the quality of a signal is deteriorated.

摘要翻译： 例如，由于用于定位用于高密度软盘的磁头的光学位置检测器被构成为使用开口111和112，其中光盘检测器108R和108L从磁盘107绑定的返回光路的厚度较大 比光源101对于盘107的前进光路的厚度，即使光束由于盘的倾斜而落在光路的中间也不容易中断，因此， 可以稳定地获得位置检测信号。 此外，通过减少要返回到光源的光能，即使物体图像之间的距离减小并且尺寸减小，也可以获得具有较小噪声的信号。在用于定位物体的常规光学位置检测器的情况下 由于光学系统的数值孔径小，用于位置检测的信号的质量很容易恶化，所以由于光盘的倾斜而导致光束倾斜而导致光束的返回路径中断，因此， 。 此外，当减小对象图像之间的距离以便缩小装置尺寸时，光源的噪声增加并且信号的质量劣化。

公开(公告)号：US06172959B2

公开(公告)日：2001-01-09

申请号：US09187862

申请日：1998-11-06

申请人： Kousei Sano ,  Shin-ichi Tanaka ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Tanaka ,  Shin-ichi Kadowaki

IPC分类号： G11B700

CPC分类号： G11B11/10515 ,  G11B7/005

摘要： An optical information processing apparatus includes: an optical head for radiating a light beam onto an information storage medium and generating a reproduction signal from the light beam reflected an/or diffracted from the information storage medium, the information storage medium carrying optically readable information recorded thereon; a transportation member for causing a relative movement of the optical head with respect to the information storage medium; and a signal processing circuit for receiving the reproduction signal generated by the optical head and processing the reproduction signal. The reproduction signal obtained from the information storage medium irradiated with the light beam includes first information from a mark near a boundary between a region which is heated by the light beam to no less than a predetermined temperature and a first region which is at a temperature below the predetermined temperature, and second information from a mark near a boundary between the region which is heated to no less than the predetermined temperature and a second region which is at a temperature below the predetermined temperature. The signal processing circuit separates the first information from the second information, or vice versa, thereby obtaining from the reproduction signal the information recorded on the information storage medium.

摘要翻译： 一种光学信息处理设备包括：光头，用于将光束辐射到信息存储介质上，并且从信息存储介质反射或衍射的光束产生再现信号，所述信息存储介质承载在其上记录的光学可读信息 ; 用于使所述光学头相对于所述信息存储介质相对移动的传送部件; 以及信号处理电路，用于接收由光头产生的再现信号并处理再现信号。 从照射光束的信息存储介质获得的再现信号包括从由光束加热到不低于预定温度的区域之间的边界附近的标记和处于低于预定温度的第一区域的第一信息 预定温度和来自加热到不低于预定温度的区域之间的边界附近的标记的第二信息和处于低于预定温度的温度的第二区域。 信号处理电路将第一信息与第二信息分开，反之亦然，从而从再现信号获得记录在信息存储介质上的信息。

公开(公告)号：US6091690A

公开(公告)日：2000-07-18

申请号：US18255

申请日：1998-02-04

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B7/09 ,  G11B7/135

CPC分类号： G11B7/0908 ,  G11B7/0901 ,  G11B7/1353 ,  G11B7/1359 ,  G11B7/1381

摘要： An optical head apparatus comprises: a light source for emitting light; a front-end converging optical system for converging the light emitted from the light source onto a multi-layer information storage medium; a back-end converging optical system for reconverging the light reflected from a layer on the multi-layer information storage medium; wavefront converting means for accepting the reconverged light, and for forming an wavefront to enable detection of a focus error signal and/or a tracking error signal; and a photodetector for receiving the light from the wavefront converting means, and for outputting a signal proportional to the amount of the received light.

摘要翻译： 一种光头装置，包括：用于发光的光源; 前端会聚光学系统，用于将从光源发射的光聚焦到多层信息存储介质上; 后端会聚光学系统，用于使从多层信息存储介质上的层反射的光重新收敛; 波前转换装置，用于接收再聚光，并且用于形成波前以使得能够检测聚焦误差信号和/或跟踪误差信号; 以及光电检测器，用于接收来自波前转换装置的光，并用于输出与所接收的光的量成比例的信号。

公开(公告)号：US5881039A

公开(公告)日：1999-03-09

申请号：US965470

申请日：1997-11-06

申请人： Kousei Sano ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Shin-ichi Kadowaki

IPC分类号： G11B7/005 ,  G11B7/14 ,  G11B20/10 ,  G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B7/14

摘要： A signal processing device for an optical information reproducing apparatus is provided. The reproducing apparatus reproduces information using a light beam from an information recording medium having tracks in which the information is recorded in such a manner that optically readable marks are digitally and selectively formed with a discrete length which is a substantially integral multiple of a basic period T. the device includes: an optical pickup head device outputting a signal mainly containing information recorded at a desired position; an equalizer receiving the signal and emphasizing an amplitude of a high frequency component of the signal relative to a low frequency component of the signal in accordance with a coefficient capable of being arbitrarily set; a clock signal generator generating a clock signal representing a timing synchronized with an edge of digital information recorded as marks or spaces on the information recording medium; an index processor receiving an output signal from the equalizer to calculate an index; and a signal processing circuit outputting a control signal for controlling the coefficient in the equalizer based on the index.

摘要翻译： 提供了一种用于光信息再现装置的信号处理装置。 再现装置使用来自信息记录介质的光束再现信息，该信息记录介质具有其中记录有信息的光道，使得光学可读标记被数字地选择性地形成，其具有基本周期T的基本上整数倍的离散长度 该装置包括：光学拾取头装置，其输出主要包含记录在期望位置的信息的信号; 接收信号并根据能够被任意设定的系数相对于信号的低频分量强调信号的高频分量的振幅的均衡器; 时钟信号发生器，产生表示与在信息记录介质上记录为标记或空格的数字信息的边缘同步的定时的时钟信号; 接收来自所述均衡器的输出信号以计算索引的索引处理器; 信号处理电路根据该索引输出用于控制均衡器中的系数的控制信号。

公开(公告)号：US20090028035A1

公开(公告)日：2009-01-29

申请号：US11912469

申请日：2006-04-24

申请人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

IPC分类号： G11B7/135

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second interfering portion transmitting a second main region; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.

摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二主区域的第二干扰部分; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二​​主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。

公开(公告)号：US07420897B2

公开(公告)日：2008-09-02

申请号：US11176207

申请日：2005-07-08

申请人： Fumitomo Yamasaki ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai

发明人： Fumitomo Yamasaki ,  Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/131 ,  G11B7/133

摘要： A light sensing area of a light sensing element is comprised of A1 region, A2 region, B1 region, B2 region and N region. A tilt detector carries out a tilt detection in accordance with a first difference signal, which is a difference signal between a signal obtained from the A1 region and a signal obtained from the B1 region, and a second difference signal, which is difference signal between a signal obtained from the A2 region and a signal obtained from the B2 region.Accordingly, an optical-disk tilt detecting signal having a little influence of defocusing can be obtained even at boundaries between recorded information tracks and non-recorded information tracks.

摘要翻译： 感光元件的感光区域由A 1区域，A 2区域，B 1区域，B 2区域和N区域构成。 倾斜检测器根据作为从A 1区域获得的信号与从B 1区域获得的信号之间的差分信号的第一差分信号和作为差分信号的第二差分信号执行倾斜检测 在从A 2区域获得的信号和从B 2区域获得的信号之间。 因此，即使在记录的信息轨道和未记录的信息轨迹之间的边界，也可以获得具有散焦影响很小的光盘倾斜检测信号。