公开(公告)号：US20130077456A1

公开(公告)日：2013-03-28

申请号：US13535633

申请日：2012-06-28

Applicant: Yuichi TAKAHASHI ,  Kazuo MOMOO ,  Jun-ichi ASADA

Inventor： Yuichi TAKAHASHI ,  Kazuo MOMOO ,  Jun-ichi ASADA

IPC: G11B7/135 ,  G11B7/09 ,  G11B7/1353

CPC classification number: G11B7/00458 ,  G11B7/003 ,  G11B7/133 ,  G11B7/1353

Abstract: 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.

Abstract translation: 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：US20110002216A1

公开(公告)日：2011-01-06

申请号：US12796788

申请日：2010-06-09

Applicant: Hiroaki MATSUMIYA ,  Yoshitaka IMAOKA ,  Jun-ichi ASADA ,  Yuichi TAKAHASHI ,  Kazuo MOMOO

Inventor： Hiroaki MATSUMIYA ,  Yoshitaka IMAOKA ,  Jun-ichi ASADA ,  Yuichi TAKAHASHI ,  Kazuo MOMOO

IPC: G11B7/135

CPC classification number: G11B7/1275 ,  G11B7/1365 ,  G11B2007/0006

Abstract: Regarding optical pickup devices usable for performing recording on and reproduction from a plurality of types of optical discs, there is a problem that because of the structure of locating many optical elements in a height direction of an optical system, the height of the optical system is increased and so it is difficult to realize a thin and compact optical pickup device. According to the present invention, a first wave plate is located between a first light source and a first mirror, a second wave plate is located between a second light source and a second mirror, and the first wave plate and the second wave plate cause a desirable phase shift to light beams of the first through third wavelengths. Owing to this, the number of optical elements located in the height direction of the optical system can be decreased, and so the height of the optical system can be reduced.

Abstract translation: 关于可用于对多种类型的光盘执行记录和再现的光学拾取装置，存在的问题是，由于在光学系统的高度方向上定位许多光学元件的结构，光学系统的高度为 增加，因此难以实现薄而紧凑的光学拾取装置。 根据本发明，第一波片位于第一光源和第一反射镜之间，第二波片位于第二光源和第二反射镜之间，第一波片和第二波片产生一个 期望的相移到第一至第三波长的光束。 因此，能够减少位于光学系统的高度方向的光学元件的数量，能够降低光学系统的高度。

公开(公告)号：US20110002117A1

公开(公告)日：2011-01-06

申请号：US12813671

申请日：2010-06-11

Applicant: Hiroshi KAYAMA ,  Yuichi TAKAHASHI ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Yuichi TAKAHASHI ,  Kazuo MOMOO

IPC: F21V5/00

CPC classification number: G11B7/13922 ,  G11B7/0045 ,  G11B7/094

Abstract: An optical disc drive includes: at least one light source; an objective lens configured to focus the light that has been emitted from the at least one light source; a chromatic aberration compensation element, which is arranged on an optical path between the at least one light source and the objective lens in order to compensate for chromatic aberration that has been produced by the objective lens; and an actuator configured to change a position of the objective lens. The actuator changes the position of the objective lens in a tracking direction by a magnitude of an offset, which is determined by a variation in wavelength of the light to be produced when the power of the light emitted from the at least one light source changes.

Abstract translation: 光盘驱动器包括：至少一个光源; 物镜，被配置为聚焦从所述至少一个光源发射的光; 色差补偿元件，其布置在所述至少一个光源和物镜之间的光路上，以便补偿由所述物镜产生的色差; 以及构造成改变物镜的位置的致动器。 致动器沿跟踪方向改变物镜的位置偏移量，其由当从至少一个光源发射的光的功率改变时要产生的光的波长变化来确定。

公开(公告)号：US20110276989A1

公开(公告)日：2011-11-10

申请号：US12983990

申请日：2011-01-04

Applicant: Yuichi TAKAHASHI ,  Kazuo MOMOO ,  Hiroaki MATSUMIYA ,  Jun-ichi ASADA

Inventor： Yuichi TAKAHASHI ,  Kazuo MOMOO ,  Hiroaki MATSUMIYA ,  Jun-ichi ASADA

IPC: G11B7/135 ,  G11B19/20

CPC classification number: G11B7/1365 ,  G11B7/09 ,  G11B7/1381 ,  G11B2007/0006

Abstract: Has an object of providing an optical pickup capable of realizing tracking control or focus control at a higher level of precision even when relative positions of a light source and a light detector are shifted due to a change in the environmental temperature, long-term deterioration or the like. The optical pickup includes a base member; a light source, fixed to the base member, for emitting a laser beam; an objective lens for collecting the laser beam onto an optical disc; a light detector, fixed to the base member, for detecting the laser beam reflected by the optical disc; fixing means for fixing the light source and/or the light detector to the base member; and a light blocking section for blocking a central portion of the laser beam in a circular shape on an optical path between the collimator lens and the light detector.

Abstract translation: 目的是提供一种能够以更高的精度实现跟踪控制或聚焦控制的光拾取器，即使当光源和光检测器的相对位置由于环境温度的变化，长期恶化或 类似。 光学拾取器包括基座构件; 固定到所述基底构件的用于发射激光束的光源; 用于将激光束收集到光盘上的物镜; 光检测器，固定到所述基座构件，用于检测由所述光盘反射的激光束; 用于将光源和/或光检测器固定到基座构件的固定装置; 以及遮光部，用于在准直透镜和光检测器之间的光路上阻挡圆形的激光束的中心部分。

公开(公告)号：US20130083640A1

公开(公告)日：2013-04-04

申请号：US13534344

申请日：2012-06-27

Applicant: Yuichi TAKAHASHI ,  Kazuo MOMOO

Inventor： Yuichi TAKAHASHI ,  Kazuo MOMOO

IPC: G11B27/36

CPC classification number: G11B7/00458 ,  G11B7/003 ,  G11B7/1263

Abstract: Disclosed is an improved DRAW technique for writing data on an optical storage medium and reading the data in parallel. In obtaining the optical power of a first light source 1, writing user data is temporarily suspended to write non-user data with a second light source 2 turned OFF.

Abstract translation: 公开了一种用于在光存储介质上写入数据并且并行读取数据的改进的DRAW技术。 在获得第一光源1的光功率时，暂时停止写入用户数据，以使第二光源2关闭来写入非用户数据。

公开(公告)号：US20100135144A1

公开(公告)日：2010-06-03

申请号：US12628555

申请日：2009-12-01

Applicant: Yuichi TAKAHASHI ,  Fumitake SAKAI ,  Yukio HIBINO ,  Koichi MURAMATSU ,  Kazuo MOMOO

Inventor： Yuichi TAKAHASHI ,  Fumitake SAKAI ,  Yukio HIBINO ,  Koichi MURAMATSU ,  Kazuo MOMOO

IPC: G11B7/135

CPC classification number: G11B7/1275 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: An optical pickup device according to the present invention comprises: a first mirror for reflecting a first light beam outputted from a first light source and letting a second light beam outputted from a second light source pass therethrough; a first object lens for converging the first light beam reflected by the first mirror on an information recording surface of a recording medium; a second mirror for reflecting the second light beam passing through the first mirror; a second object lens for converging the second light beam reflected by the second mirror on the information recording surface of the recording medium; and an achromatic lens for correcting an axial chromatic aberration of the second object lens generated by wavelength variation of the second light beam, wherein the achromatic lens is provided in an optical path between the first mirror and the second mirror.

Abstract translation: 根据本发明的光拾取装置包括：用于反射从第一光源输出的第一光束并使从第二光源输出的第二光束通过的第一反射镜; 第一物镜，用于将由第一反射镜反射的第一光束会聚在记录介质的信息记录表面上; 用于反射通过第一反射镜的第二光束的第二反射镜; 用于将由第二反射镜反射的第二光束会聚在记录介质的信息记录表面上的第二物镜; 以及用于校正由第二光束的波长变化产生的第二物镜的轴向色差的消色差透镜，其中，所述消色差透镜设置在所述第一反射镜和所述第二反射镜之间的光路中。

公开(公告)号：US20110170385A1

公开(公告)日：2011-07-14

申请号：US12983963

申请日：2011-01-04

Applicant: Hiroshi KAYAMA ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Kazuo MOMOO

IPC: G11B7/00

CPC classification number: G11B7/00456 ,  G11B7/00745

Abstract: An optical disc drive according to the present invention can write information on an optical disc, which includes a substrate on which a number of pre-pits 2 have been formed on its tracks and a recording film that is supported on the substrate. The drive includes an optical pickup and a writing control section for controlling the optical pickup so that marks 3 are recorded so as to overlap with some of the pre-pits 2 on the tracks and for making the optical pickup irradiate the recording film with a writing light beam. The writing control section changes the interval of each pair of recorded marks that are adjacent to each other along the radius of the optical disc according to the optical power of the writing light beam. Thus, the optical disc drive of the present invention can record a mark on an optical disc on which pre-pits have already been formed even if the optical disc has a simplified structure.

Abstract translation: 根据本发明的光盘驱动器可以在光盘上写入信息，该光盘包括在其轨道上已经形成有多个预凹坑2的基板和被支撑在基板上的记录膜。 驱动器包括光学拾取器和写入控制部分，用于控制光学拾取器，使得标记3被记录为与轨道上的一些预制凹坑2重叠，并且使得光学拾取器以写入方式照射记录膜 光束。 写入控制部根据写入光束的光焦度来改变沿着光盘的半径彼此相邻的每对记录标记的间隔。 因此，本发明的光盘驱动器可以在已经形成预凹坑的光盘上记录标记，即使光盘具有简化的结构。

公开(公告)号：US20130083641A1

公开(公告)日：2013-04-04

申请号：US13609484

申请日：2012-09-11

Applicant: Yasushi KOBAYASHI ,  Yohichi SAITOH ,  Kazuo MOMOO

Inventor： Yasushi KOBAYASHI ,  Yohichi SAITOH ,  Kazuo MOMOO

IPC: G11B7/09 ,  G11B7/127 ,  G11B7/1374 ,  G11B7/1353

CPC classification number: G11B7/00458 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/0916 ,  G11B7/1353 ,  G11B7/1381

Abstract: 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.

Abstract translation: 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。 如果从轨道上的零级衍射光束留下的光束点与该磁道上的±一级衍射光束留下的光束点的距离为d [μm]，则存储器的扫描线速度 介质是v [m / s]，并且一旦被零级衍射光束熔化的存储介质的相变材料固化所花费的时间是T [μs]，vT＆nlE; d满足 。

公开(公告)号：US20110261670A1

公开(公告)日：2011-10-27

申请号：US13020095

申请日：2011-02-03

Applicant: Hiroaki MATSUMIYA ,  Kazuo MOMOO

Inventor： Hiroaki MATSUMIYA ,  Kazuo MOMOO

IPC: G11B7/00

CPC classification number: G11B7/1381 ,  G11B7/1353 ,  G11B2007/0013

Abstract: When recording/reproducing an information recording medium having a plurality of information recording layers, a photodetector receives reflected light from a recording layer which is being recorded/reproduced, as well as reflected light from another recording layer which is not being recorded/reproduced, making it difficult to appropriately detect control signals during a recording/reproducing operation. The present invention employs a polarization hologram element so that the polarization direction of 0th-order diffracted light and that of 1st-order diffracted light are made to be orthogonal to each other before light reflected from an information recording medium is incident upon the detector. Thus, it is possible to reduce the influence of interference with light from the other recording layer and to obtain appropriate control signals, thereby realizing an optical pickup device with desirable recording capability. By using the polarization hologram element so that the polarization direction of 0th-order diffracted light and that of 1st-order diffracted light are orthogonal to each other, it is possible to reduce the size and the thickness of an optical pickup device.

Abstract translation: 当记录/再现具有多个信息记录层的信息记录介质时，光电检测器接收来自正被记录/再现的记录层的反射光以及来自未记录/再现的另一个记录层的反射光， 在记录/再现操作期间难以适当地检测控制信号。 本发明采用偏振全息元件，使得从信息记录介质反射的光入射到检测器之前，将0级衍射光和1级衍射光的偏振方向彼此正交。 因此，可以减少来自其他记录层的光的干涉的影响，并获得适当的控制信号，从而实现具有期望的记录能力的光学拾取装置。 通过使用偏振全息元件，使得0次衍射光的偏振方向和1次衍射光的偏振方向彼此正交，可以减小光学拾取装置的尺寸和厚度。

公开(公告)号：US20130088948A1

公开(公告)日：2013-04-11

申请号：US13609557

申请日：2012-09-11

Applicant: Hiroshi KAYAMA ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Kazuo MOMOO

IPC: G11B7/135

CPC classification number: G11B7/00458 ,  G11B7/1353

Abstract: An optical read/write apparatus as an embodiment of the present invention includes: a light-splitting element configured to split a light beam emitted from a light source into multiple light beams including a write beam and a read beam; an optical system configured to converge the write and read beams onto the same track on an optical storage medium; a photodetector including a light receiving element configured to detect the read beam reflected from the optical storage medium and output an electrical signal; and a divider configured to generate a read signal by dividing the signal detected by the light receiving element by a signal that represents a write modulated component and that is obtained by detecting a part of the light beam emitted from the light source.