公开(公告)号：US08451700B2

公开(公告)日：2013-05-28

申请号：US13609484

申请日：2012-09-11

申请人： Yasushi Kobayashi ,  Yohichi Saitoh ,  Kazuo Momoo

发明人： Yasushi Kobayashi ,  Yohichi Saitoh ,  Kazuo Momoo

IPC分类号： G11B7/00

CPC分类号： G11B7/00458 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/0916 ,  G11B7/1353 ,  G11B7/1381

摘要： In one embodiment, the optical pickup device includes: a light source that emits a light beam; a diffractive element that diffracts the light beam and generates a zero-order and ±first-order diffracted light beams; an objective lens that converges the diffracted light beams onto the same track on the storage medium; and a photodetector that receives the diffracted light beams reflected from the storage medium. If a distance from a light beam spot left by the zero-order diffracted light beam on the track to light beam spots left by the ±first-order diffracted light beams on that track is d [μm], the scanning linear velocity of the storage medium is v [m/s], and a time it takes for a phase-change material of the storage medium that has once been melted by the zero-order diffracted light beam to solidify is T [μs], vT≦d is satisfied.

摘要翻译： 在一个实施例中，光学拾取装置包括：发射光束的光源; 衍射元件，衍射光束并产生零级和±一级衍射光束; 将衍射光束会聚在存储介质上的同一轨道上的物镜; 以及光接收器，其接收从存储介质反射的衍射光束。 如果从光轨上的零级衍射光束留下的光束点与该轨道上±1级衍射光束留下的光束点的距离为d [m]，则存储器的扫描线速度 介质是v [m / s]，并且由零级衍射光束一度熔化的存储介质的相变材料固化所花费的时间是T [mus]，vT @ d 。

公开(公告)号：US08659985B2

公开(公告)日：2014-02-25

申请号：US13398934

申请日：2012-02-17

申请人： Jun-ichi Asada ,  Kazuo Momoo ,  Yohichi Saitoh

发明人： Jun-ichi Asada ,  Kazuo Momoo ,  Yohichi Saitoh

IPC分类号： G11B7/1353 ,  G11B7/1263

CPC分类号： G11B7/00458 ,  G11B7/003 ,  G11B7/1353

摘要： In one embodiment of the present invention, an optical pickup for writing and reading data on an optical storage medium comprises a diffractive element for diffracting a light beam to split it into multiple light beams. The diffracted light beams includes a zero-order diffracted light beam for writing data on a track of the land or the groove of the optical storage medium and non-zero-order diffracted light beams for reading the data from the track. The diffractive element has first and second diffraction gratings that have mutually different grating vector directions and pitches. The first diffraction grating forms light beam spots on the same track by the non-zero-order and zero-order diffracted light beams. The second diffraction grating forms a light beam spot to extend to both sides of said track, or forms a light beam spot on one side of said track, by the non-zero-order diffracted light beams.

摘要翻译： 在本发明的一个实施例中，用于在光学存储介质上写入和读取数据的光学拾取器包括用于衍射光束以将其分成多个光束的衍射元件。 衍射光束包括用于在光存储介质的焊盘或凹槽的轨道上写入数据的零级衍射光束和用于从轨道读取数据的非零级衍射光束。 衍射元件具有第一和第二衍射光栅，其具有相互不同的光栅矢量方向和间距。 第一衍射光栅通过非零级和零级衍射光束在同一轨道上形成光束点。 第二衍射光栅形成光束点，以延伸到所述轨道的两侧，或者通过非零级衍射光束在所述轨道的一侧上形成光束点。

公开(公告)号：US08861322B2

公开(公告)日：2014-10-14

申请号：US13600386

申请日：2012-08-31

申请人： Hiroaki Matsumiya ,  Kazuo Momoo

发明人： Hiroaki Matsumiya ,  Kazuo Momoo

IPC分类号： G11B7/135 ,  G11B7/131 ,  G11B7/14 ,  G11B7/127 ,  G11B7/09 ,  G11B7/0045 ,  G11B7/1381 ,  G11B7/00 ,  G11B7/003

CPC分类号： G11B7/0903 ,  G11B7/003 ,  G11B7/00458 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1381 ,  G11B7/14 ,  G11B2007/0013

摘要： An exemplary optical pickup comprises: a light source with first and second emission points; an optical branching element which branches light emitted from the first emission point into multiple light beams including a first main beam and first sub-beams and which also branches light emitted from the second emission point into multiple light beams including a second main beam and second sub-beams; an optical system which condenses the multiple light beams produced by the optical branching element onto an optical storage medium, thereby making the first and second main beams form a write light beam spot and a read light beam spot, respectively, on a target recording track on the storage medium and making the first and second sub-beams form reference light beam spots and other light beam spots somewhere on the storage medium other than the target recording track.

摘要翻译： 示例性光学拾取器包括：具有第一和第二发射点的光源; 将从第一发射点发射的光分支成包括第一主光束和第一子光束的多个光束并且还将从第二发射点发射的光分支成包括第二主光束和第二子光束的多个光束的光分支元件 光束 光学系统，其将由光分路器产生的多个光束会聚到光存储介质上，从而使第一和第二主光束分别在目标记录轨道上形成写入光束点和读取光束点， 存储介质并使第一和第二子光束在存储介质上除了目标记录轨道之外的某处形成参考光束点和其他光束点。

公开(公告)号：US08619522B2

公开(公告)日：2013-12-31

申请号：US13535633

申请日：2012-06-28

申请人： Yuichi Takahashi ,  Kazuo Momoo ,  Jun-ichi Asada

发明人： Yuichi Takahashi ,  Kazuo Momoo ,  Jun-ichi Asada

IPC分类号： G11B7/00

CPC分类号： G11B7/00458 ,  G11B7/003 ,  G11B7/133 ,  G11B7/1353

摘要： In one embodiment, an optical pickup includes an optical system which forms multiple light beams based on the light emitted from a light source and which converges a write beam and a read beam, thereby forming a main spot and a sub-spot, respectively, on an optical storage medium. This optical system converges the write and read beams onto the optical storage medium so that the main spot moves through the same region on the optical storage medium ahead of the sub-spot. The optical pickup further includes a detector for sensing the write and read beams reflected from the storage medium. The detector includes a first photodiode 10 that receives the reflected light from the main spot 50R on the storage medium and a second photodiode 11 that receives a portion of the reflected light from the sub-spot 51R.

摘要翻译： 在一个实施例中，光学拾取器包括基于从光源发射的光形成多个光束并且会聚写入光束和读取光束的光学系统，从而分别形成主光点和子光点 光学存储介质。 该光学系统将写入和读取光束会聚到光学存储介质上，使得主光点移动到子光点之前的光学存储介质上的相同区域。 光学拾取器还包括用于感测从存储介质反射的写入和读出光束的检测器。 检测器包括接收来自存储介质上的主光斑50R的反射光的第一光电二极管10和接收来自子光点51R的一部分反射光的第二光电二极管11。

公开(公告)号：US08462596B2

公开(公告)日：2013-06-11

申请号：US13511017

申请日：2010-11-24

申请人： Yuichi Takahashi ,  Kazuo Momoo ,  Hiroaki Matsumiya ,  Jun-ichi Asada

发明人： Yuichi Takahashi ,  Kazuo Momoo ,  Hiroaki Matsumiya ,  Jun-ichi Asada

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/1381 ,  G11B2007/0013

摘要： When performing recording/reproduction of information for a given recording layer of an optical disc having three recording layers, influences of reflected light from other recording layers are reduced or removed, thus making it possible to obtain a more stable RF signal or focus error signal.An optical pickup device includes a light source, a collimator lens, an objective lens, a photodetector, and a light shielding member. Among the recording layers of the optical disc, a first layer and a second layer adjoining each other are disposed in the order of the first layer and second layer from near the objective lens. The light shielding member is disposed at a position satisfying the condition d>d1 to block a part of reflected light from the second layer when light is converged on the first layer, where d is an optical path length from the photodetector to the light shielding member; and d1 is a distance from the photodetector to a position at which reflected light from the second layer becomes focused between the collimator lens and the photodetector.

摘要翻译： 当对具有三个记录层的光盘的给定记录层执行信息的记录/再现时，减少或去除来自其它记录层的反射光的影响，从而可以获得更稳定的RF信号或聚焦误差信号。 光学拾取装置包括光源，准直透镜，物镜，光电检测器和遮光构件。 在光盘的记录层中，邻接的第一层和第二层以物镜附近的第一层和第二层的顺序设置。 光遮蔽构件设置在满足条件d> d1的位置，以便当光聚焦在第一层上时阻挡来自第二层的反射光的一部分，其中d是从光电检测器到遮光构件的光路长度 ; d1是从光电检测器到第二层的反射光在准直透镜和光电检测器之间聚焦的位置的距离。

公开(公告)号：US20060262672A1

公开(公告)日：2006-11-23

申请号：US10557292

申请日：2004-05-19

申请人： Hiroshi Kayama ,  Kazuo Momoo

发明人： Hiroshi Kayama ,  Kazuo Momoo

IPC分类号： G11B7/00

CPC分类号： G11B7/1263

摘要： An optical disk apparatus including: a light source; an objective lens for converging light emitted from the light source toward an optical disk; a first photodetection device for detecting reflected light from the optical disk and outputting a first signal; a signal processing section for receiving the first signal and generating a signal containing information recorded on the optical disk; a second photodetection device for detecting a portion of the light emitted from the light source and outputting a second signal; a light source driving section for receiving the second signal, and based on the second signal, driving the light source so that output power of the light source equals a target value; and an amplitude fluctuation detection section for detecting an amplitude fluctuation amount of the second signal, and if the amplitude fluctuation amount exceeds a predetermined value, changing driving characteristics of the light source driving section.

摘要翻译： 一种光盘装置，包括：光源; 用于将从光源发射的光会聚到光盘的物镜; 第一光检测装置，用于检测来自光盘的反射光并输出第一信号; 信号处理部分，用于接收第一信号并产生包含记录在光盘上的信息的信号; 第二光检测装置，用于检测从光源发射的光的一部分并输出第二信号; 光源驱动部分，用于接收第二信号，并且基于第二信号驱动光源，使得光源的输出功率等于目标值; 以及振幅变动检测部，其检测第二信号的振幅变动量，如果振幅波动量超过规定值，则改变光源驱动部的驱动特性。

公开(公告)号：US20050243432A1

公开(公告)日：2005-11-03

申请号：US11112243

申请日：2005-04-22

申请人： Yuuichi Takahashi ,  Kazuo Momoo

发明人： Yuuichi Takahashi ,  Kazuo Momoo

IPC分类号： G01N21/86 ,  G01V8/00 ,  G01V8/14 ,  G11B7/125

CPC分类号： G11B7/127 ,  G01V8/14

摘要： A light emitting device according to the present invention includes: a first light source for emitting light having a first wavelength; and a second light source for emitting light having a second wavelength which is different from the first wavelength, wherein the first light source and the second light source are arranged in the same housing, and a relationship of θh1>θh2 is satisfied, where θh1 denotes an angle (full-width-half-maximum) of radiation of the light emitted from the first light source in the horizontal direction, and θh2 denotes an angle (full-width-half-maximum) of radiation of the light emitted from the second light source in the horizontal direction.

摘要翻译： 根据本发明的发光器件包括：用于发射具有第一波长的光的第一光源; 以及用于发射具有与第一波长不同的第二波长的光的第二光源，其中第一光源和第二光源布置在同一壳体中，并且满足第一光束和第二光源的关系，其中 thetah 1表示从第一光源沿水平方向发射的光的角度（全宽半最大值），并且角度2表示光的辐射角度（全宽半最大值） 从第二光源沿水平方向发射。

公开(公告)号：US20050226120A1

公开(公告)日：2005-10-13

申请号：US11100028

申请日：2005-04-06

申请人： Seiji Nishiwaki ,  Kazuo Momoo

发明人： Seiji Nishiwaki ,  Kazuo Momoo

IPC分类号： G03H1/04 ,  G03H1/22 ,  G11B7/00 ,  G11B7/0065 ,  G11B7/125

CPC分类号： G11B7/0065 ,  G03H2001/0415 ,  G03H2250/42 ,  G11B7/128

摘要： There is provided an information processing device which is capable of suppressing generation of stray light at the time of recording and reproduction of information, thus enabling quality information recording and reproduction. The information processing device includes: a radiation light source 2; and a converging section for converging rays emitted from the light source toward an information recording medium having a photosensitive layer 11b, wherein the converging section splits the rays into first and second rays 3′ and 3 respectively traveling through first and second spaces as divided by a plane at least containing a point optical axis L, and converges the first and second rays 3′ and 3 onto first and second points 12′ and 12 in the information recording medium 11, the photosensitive layer 11b being interposed between the first and second points 12′ and 12. Between the first and second points 12′ and 12, the first and second rays 3′ and 3 interfere with each other to form interference fringes, the interference fringes representing information to be recorded in the photosensitive layer 11b of the information recording medium 11.

摘要翻译： 提供了一种信息处理装置，其能够抑制在记录和再现信息时的杂散光的产生，从而实现质量信息的记录和再现。 信息处理装置包括：辐射光源2; 以及会聚部分，用于将从光源发射的光线朝向具有感光层11b的信息记录介质会聚，其中会聚部分将光线分裂成分别穿过第一和第二空间的第一和第二光线3'和3，除以 至少包含点光轴L的平面，并且将第一和第二光线3'和3收敛在信息记录介质11中的第一和第二点12'和12上，感光层11b介于第一和第二 12点和12点。 在第一和第二点12'和12之间，第一和第二射线3'和3彼此干涉以形成干涉条纹，干涉条纹表示要记录在信息记录介质11的感光层11b中的信息。

公开(公告)号：US06920101B2

公开(公告)日：2005-07-19

申请号：US10616859

申请日：2003-07-10

申请人： Youichi Saitoh ,  Junichi Asada ,  Yuichi Takahashi ,  Seiji Nishiwaki ,  Kenji Nagashima ,  Kazuo Momoo ,  Junji Nagaoka

发明人： Youichi Saitoh ,  Junichi Asada ,  Yuichi Takahashi ,  Seiji Nishiwaki ,  Kenji Nagashima ,  Kazuo Momoo ,  Junji Nagaoka

IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/139 ,  G11B7/1353

摘要： An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the optical disk or an aperture is varied in recording and in reproduction. This configuration improves recording/reproducing ability since light is focused on an optical disk with high numerical aperture. In addition, since reflected light from the optical disk is detected with low numerical aperture, margins for tilt and defocus are not reduced. Furthermore, since unnecessary signal components contained in the reflected light can be eliminated, a S/N (signal-to-noise ratio) of an information signal also increases. Thus, a high-performance optical disk device can be obtained. Alternatively, by varying the aperture of an objective lens in recording and in reproduction, an optical disk device in which recording density and recording quality are increased without deteriorating reproduction quality can be obtained.

公开(公告)号：US06704254B1

公开(公告)日：2004-03-09

申请号：US09698904

申请日：2000-10-27

申请人： Seiji Nishiwaki ,  Kazuo Momoo ,  Junji Nagaoka

发明人： Seiji Nishiwaki ,  Kazuo Momoo ,  Junji Nagaoka

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0943

摘要： This optical disk device includes an objective lens (7) for condensing radiated light from a light source on an optical disk (8), an optical detecting unit for detecting reflected light from the optical disk (8), and a control unit for performing the tracking control and/or the tilt control of the objective lens (7) by utilizing the output from the optical detecting unit, in which the control unit uses the off-track quantity and/or the tilt quantity of the objective lens (7) when performing the above described control.

摘要翻译： 该光盘装置包括用于将来自光源的辐射光聚焦在光盘（8）上的物镜（7），用于检测来自光盘（8）的反射光的光学检测单元，以及用于执行 通过利用来自光学检测单元的输出来跟踪控制和/或物镜（7）的倾斜控制，其中控制单元使用物镜（7）的越野量和/或倾斜量，当 执行上述控制。