公开(公告)号：US20020071353A1

公开(公告)日：2002-06-13

申请号：US10075267

申请日：2002-02-15

发明人： Harukazu Miyamoto ,  Yoshio Suzuki ,  Motoyuki Suzuki ,  Hisataka Sugiyama ,  Hiroyuki Minemura ,  Tetsuya Fushimi ,  Nobuhiro Tokushuku

IPC分类号： G11B007/095

CPC分类号： G11B20/12 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0053 ,  G11B7/006 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/0938 ,  G11B7/24082 ,  G11B19/20 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10009 ,  G11B27/19 ,  G11B27/24 ,  G11B27/28 ,  G11B27/3027

摘要： An information recording apparatus for recording information to an optical recording medium including, a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, the groove structure being wobbled in a radial direction of the medium, the track being divided into a plurality of recording units in the track direction by at least one radial boundary line, at least two adjacent recording units in the radial direction of the medium comprise one zone, and the groove structure included in the respective recording units within one zone having substantially same number of wobbling. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.

摘要翻译： 一种信息记录装置，用于将信息记录到沿着形成在盘状基板上的轨道上的包括圆盘状基板，螺旋状或同心状的槽结构的光记录介质，所述槽结构沿着 介质，所述轨道通过至少一个径向边界线在轨道方向上分成多个记录单元，所述介质的径向方向上的至少两个相邻的记录单元包括一个区域，并且包括在各个记录中的槽结构 在一个区域内的单元具有基本相同数量的摆动。 信息记录装置包括用于照射光记录介质上的光点的照射源和用于控制来自照射源的光点的照射位置的控制器。

公开(公告)号：US20020064107A1

公开(公告)日：2002-05-30

申请号：US09994190

申请日：2001-11-26

发明人： Hiroki Uemura

IPC分类号： G11B007/095 ,  G11B007/135

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/094 ,  G11B7/1353 ,  G11B7/1381

摘要： The semiconductor laser device includes a signal light diffraction grating, and a light receiving portion having a pair of photodiodes extending as two strips with a parting portion or a zonal gap interposed therebetween and receiving a focus error detecting beam from the signal light diffraction grating. The light receiving portion is arranged such that its longitudinal direction is orthogonal to the direction of diffraction grooves of the signal light diffraction grating. The pair of photodiodes is arranged such that a spot of the focus error detecting beam moves, due to temperature changes, in a range essentially limited to the parting portion therebetween. Thus, a semiconductor laser device and an optical pickup apparatus suppressing focus errors due to temperature changes and preventing reduction in signal strength can be obtained.

摘要翻译： 半导体激光装置包括信号光衍射光栅和具有一对光电二极管的光接收部分，该对光电二极管分成两条，分隔部分或区带间隙插入其间，并接收来自信号光衍射光栅的聚焦误差检测光束。 光接收部分布置成使其纵向方向与信号光衍射光栅的衍射槽的方向正交。 一对光电二极管被布置成使得聚焦误差检测光束的光点由于温度变化而在基本上限于它们之间的分离部分的范围内移动。 因此，可以获得抑制由温度变化引起的焦点误差并防止信号强度降低的半导体激光器件和光学拾取装置。

公开(公告)号：US20020051410A1

公开(公告)日：2002-05-02

申请号：US09984998

申请日：2001-11-01

申请人： SONY CORPORATION

发明人： Hiroaki Okajima

IPC分类号： G11B007/095

CPC分类号： G11B7/08511

摘要： The invention provides a focus search apparatus and a focus search method by which damage to an objective lens of an optical pickup or an optical recording medium upon a focus search can be prevented at a low cost. The optical pickup is driven in a focusing direction with a gradually increasing amplitude, and the driving is stopped when the optical pickup reaches a range within which focus servoing is possible. Since the amplitude of the driving exhibits a gradual increase, even if the optical pickup is driven over several periods in an initial stage of the focus search, the amplitude of the driving then is still small. Since the optical pickup has a number of opportunities in which it can reach the range within which focus servoing is possible equal to the number of periods, the possibility that the optical pickup may collide with the optical recording medium is low.

摘要翻译： 本发明提供了一种可以以低成本防止在焦点搜索时对光学拾取器或光学记录介质的物镜造成损坏的对焦搜索装置和焦点搜索方法。 光拾取器在聚焦方向上以逐渐增加的幅度被驱动，并且当光学拾取器达到可以进行聚焦伺服的范围时，驱动停止。 由于驱动振幅呈逐渐增加，即使在聚焦搜索的初始阶段光学拾取器被驱动多个时段，驱动的幅度仍然很小。 由于光学拾取器具有许多机会可以达到聚焦伺服可能等于周期数的范围，因此光学拾取器可能与光学记录介质碰撞的可能性较低。

公开(公告)号：US20020041545A1

公开(公告)日：2002-04-11

申请号：US09972701

申请日：2001-10-05

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： Fumitomo Yamasaki ,  Hideki Aikoh ,  Akihiro Arai ,  Tohru Nakamura

IPC分类号： G11B007/095

CPC分类号： G11B7/094 ,  G11B7/0901 ,  G11B7/0956

摘要： An information recording/reproducing apparatus includes a focusing optical system for focusing light from a light source on an information recording medium as a light spot and an error signal generation system for generating an error signal that represents the positional deviation between an information track and the light spot on the information recording medium from the light reflected by the information recording medium. The apparatus further includes a tilt measurement system for measuring the amount of relative inclination between the focusing optical system and the information recording medium and an offset application system for performing off-track of the light spot by applying an electric offset corresponding to the measured amount of inclination to the error signal. Since the electric offset that corresponds to the amount of inclination is added directly to the error signal, the apparatus does not require a complicated algorithm and can improve the recording and reproduction characteristics easily at low cost.

摘要翻译： 一种信息记录/再现装置，包括用于将来自光源的光聚焦在作为光点的信息记录介质上的聚焦光学系统和用于产生表示信息光道与光线之间的位置偏差的误差信号的误差信号发生系统 从信息记录介质反射的光线在信息记录介质上点光。 该装置还包括倾斜测量系统，用于测量聚焦光学系统和信息记录介质之间的相对倾斜度，以及偏移应用系统，用于通过施加与所测量的测量量相对应的电偏移来执行光斑的偏离 倾斜于误差信号。 由于对应于倾斜量的电偏移直接与误差信号相加，因此该装置不需要复杂的算法，并且可以以低成本容易地提高记录和再现特性。

公开(公告)号：US20020021633A1

公开(公告)日：2002-02-21

申请号：US09836533

申请日：2001-04-18

发明人： Takao Shimamura

IPC分类号： G11B007/095

CPC分类号： G11B7/126 ,  G11B7/08505 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0946

摘要： When a setup is performed by reproducing conditions corresponding to the first kind of optical disk and a setup is subsequently performed by reproducing conditions corresponding to the second kind of optical disk, the reproducing conditions which succeed to at least a part of the reproducing conditions corresponding to the first kind of optical disk are used as reproducing conditions corresponding to the second kind of optical disk and the setup is performed. When the setup is completed, the reproducing conditions corresponding to the optical disk as a target of the setup are stored. When the same optical disk is set up again, the stored reproducing conditions are used.

摘要翻译： 当通过再现与第一种类型的光盘相对应的条件进行设置时，随后通过再现与第二种类型的光盘相对应的条件来执行设置，再现条件是，至少部分再现条件对应于 第一种光盘被用作对应于第二类光盘的再现条件，并且进行设置。 当设置完成时，存储与作为设置的目标的光盘相对应的再现条件。 当再次设置相同的光盘时，使用存储的再现条件。

公开(公告)号：US20020021631A1

公开(公告)日：2002-02-21

申请号：US09846543

申请日：2001-05-01

申请人： FUJITSU LIMITED

发明人： Kazuhito Yokohama ,  Yasukiyo Kunimatsu

IPC分类号： G11B007/095

CPC分类号： G11B7/082 ,  G11B7/0925 ,  G11B7/22

摘要： Disclosed herein is an optical storage device having an objective lens actuator for moving an objective lens in a focusing direction. The objective lens actuator includes an actuator base fixed to a carriage movable in the radial direction of an optical disk, a lens holder for holding the objective lens, and a supporting mechanism for elastically supporting the lens holder to the actuator base. The actuator base has an elongated hole extending in the radial direction of the optical disk. A relative position between the actuator base and the carriage is adjusted so that the tilt of the optical axis of the objective lens in the radial direction of the optical disk occurring in displacing the lens holder in the focusing direction is minimized, and thereafter the actuator base is fixed to the carriage by means of screws.

摘要翻译： 这里公开了一种具有用于在聚焦方向上移动物镜的物镜致动器的光存储装置。 物镜致动器包括固定到可在光盘的径向上移动的托架的致动器基座，用于保持物镜的透镜保持器和用于将透镜保持器弹性地支撑到致动器基座的支撑机构。 致动器基座具有在光盘的径向方向上延伸的细长孔。 调节致动器基座和托架之间的相对位置，使得在聚焦方向上使透镜保持器移位时在光盘的径向方向上的物镜的光轴的倾斜被最小化，然后致动器基座 通过螺丝固定在滑架上。

公开(公告)号：US20020006092A1

公开(公告)日：2002-01-17

申请号：US09837224

申请日：2001-04-19

发明人： Koji Takasaki ,  Hitoshi Okada ,  Tsutomu Maruyama

IPC分类号： G11B007/095

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/0943

摘要： A method of tracking servo for an optical pickup device comprises the steps of generating each individual push pull signal (an SPP1 signal, an SPP2 signal and an MPP signal) with a photo detector composed of a main photo detector having four photo-detecting sections crosswise and two side photo detectors having respectively two photo-detecting sections left and right, and generating a tracking error signal (a DPP signal) on the basis of operational output from the push pull signals resulting from respectively canceling the amounts of DC offset produced in each of the push pull.

摘要翻译： 一种用于光学拾取装置的跟踪伺服的方法包括以下步骤：用具有四个光检测部分的主光电检测器构成的光检测器产生每个单独的推挽信号（SPP1信号和MPP信号） 和两个侧面光电检测器，分别具有左和右两个光电检测部分，并且基于从分别消除每个中产生的DC偏移量产生的推挽信号的操作输出产生跟踪误差信号（DPP信号） 的推拉。

公开(公告)号：US20020003755A1

公开(公告)日：2002-01-10

申请号：US09897668

申请日：2001-07-02

申请人： Ricoh Company, Ltd.

发明人： Kazuhiro Fujita ,  Hiroyoshi Funato ,  Hiroshi Koide

IPC分类号： G11B007/095

CPC分类号： G11B7/1395 ,  G11B7/0901 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/13927 ,  G11B2007/0013

摘要： In an optical pickup method and device of the present invention, a grating unit separates a light beam, emitted by a light source, into a 0th order diffracted beam and 1st order diffracted beams. An objective lens focuses the diffracted beams, sent from the grating unit, onto a recording surface of an optical recording medium through a transparent substrate of the medium, so that a main spot is formed on the recording surface by the 0th order diffracted beam and sub-spots, interposing the main spot therebetween, are formed on the recording surface by the 1st order diffracted beams. A reflection beam detector receives reflection beams from the main spot and the sub-spots of the medium to generate detection signals from the received reflection beams. A control unit changes a pattern of the beams incident to the objective lens to correct a spherical aberration due to a deviation of a thickness of the substrate of the medium, and moves the grating unit relative to the light source to cancel shifting of sub-spot positions on the recording surface due to the spherical aberration correction, in order to generate a proper tracking error signal.

摘要翻译： 在本发明的光拾取方法和装置中，光栅单元将由光源发射的光束分离为第0级衍射光束和一级衍射光束。 物镜将从光栅单元发送的衍射光束通过介质的透明基板聚焦到光记录介质的记录表面上，从而通过第0级衍射光束和子像素在记录表面上形成主光斑 通过1级衍射光束在记录表面上形成插入其间的主光斑。 反射光束检测器接收来自主光点的反射光束和介质的子光点，以从接收的反射光束产生检测信号。 控制单元改变入射到物镜的光束的图案，以校正由于介质的基板的厚度偏差引起的球面像差，并且使光栅单元相对于光源移动以消除子点的移动 由于球面像差校正，记录表面上的位置，以便产生适当的跟踪误差信号。

公开(公告)号：US20010055248A1

公开(公告)日：2001-12-27

申请号：US09899204

申请日：2001-07-06

发明人： Takayuki Nagata ,  Akihiro Arai ,  Toru Nakamura ,  Takao Hayashi

IPC分类号： G11B007/095 ,  G11B007/135

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/095 ,  G11B7/13

摘要： An optical head comprises a photodetector 8 having divided photosensitive areas to detect light 13 reflected from an optical disk 7, means 10, 11, 12 for obtaining tracking error signal by operating signals from the photosensitive areas. The photodetector 8 has a first division line 9a parallel to an information track on the optical disk and second and third division lines 9b, 9c perpendicular to the first division line 9f and symmetrical to the optical axis. Further, a light-shielding area 8i is provided for shielding a part of the reflected light between the division lines 9b and 9c. The signals are operated to reduce offset of the tracking error signal due to a shift of object lens and a tilt of the optical disk. Accordingly, the optical head of the present invention has a small offset of tracking error signal with a simple structure.

摘要翻译： 光头包括光电检测器8，其具有分离的感光区域以检测从光盘7反射的光13，用于通过操作来自感光区域的信号来获得跟踪误差信号的装置10,11,12。 光电检测器8具有与光盘上的信息轨道平行的第一分割线9a和与第一分割线9f垂直并与光轴对称的第二和第三分割线9b，9c。 此外，设置遮光区域8i以遮蔽分割线9b和9c之间的一部分反射光。 操作信号以减少由于物镜的偏移和光盘倾斜引起的跟踪误差信号的偏移。 因此，本发明的光头具有简单结构的跟踪误差信号的小偏移。

公开(公告)号：US20010033530A1

公开(公告)日：2001-10-25

申请号：US09799568

申请日：2001-03-07

申请人： TDK CORPORATION

发明人： Giichi Shibuya

IPC分类号： G11B007/095 ,  G11B007/135

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/123 ,  G11B7/1353

摘要： The spot diameter D3 of a side beam 21 imaged on a disc 5 is set to at least 2.5 times as large as that of a main beam. Via this configuration, an output signal from a detector detecting a reflected light via a side beam, that is, a signal representing a different in the output from photo-detection devices split by split lines in the radial contains a negligible track cross component caused by a beam spot crossing a track. The signal substantially contains a DC offset component alone caused by the shift of an objective lens in the radial direction under tracking control. Thus, by subtracting the output signal of the detector from the push-pull signal of the main beam, a tracking signal substantially containing no DC offset.

摘要翻译： 成像在盘5上的侧光束21的光斑直径D3设定为主光束的至少2.5倍。 通过这种配置，来自检测器的检测器的输出信号经由侧光束检测出反射光，即，表示与由径向分割线分割的光检测装置的输出不同的信号包含由 横过轨道的光束点。 该信号基本上包含由跟踪控制下的物镜在径向方向的偏移引起的DC偏移分量。 因此，通过从主波束的推挽信号中减去检测器的输出信号，基本上不包含DC偏移的跟踪信号。