公开(公告)号：US20110170386A1

公开(公告)日：2011-07-14

申请号：US12984721

申请日：2011-01-05

Applicant: Hiroshi KAYAMA ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Kazuo MOMOO

IPC: G11B7/0045 ,  G11B7/00 ,  G11B20/18

CPC classification number: G11B7/00745 ,  G11B7/00456 ,  G11B7/1267

Abstract: An optical disc drive according to the present invention includes an optical pickup and a writing control section for instructing the optical pickup to record a mark, representing the information to be written, on the optical disc. In recording the mark on the optical disc, the writing control section instructs the optical pickup to irradiate the same area on the optical disc with a light beam a plurality of times so that the mark is recorded in that repeatedly irradiated area.

Abstract translation: 根据本发明的光盘驱动器包括光学拾取器和写入控制部分，用于指示光学拾取器将表示要写入的信息的标记记录在光盘上。 在光盘上记录标记时，写入控制部分指示光学拾取器用光束多次照射在光盘上的相同区域，使得标记被记录在该反复照射的区域中。

公开(公告)号：US20110170384A1

公开(公告)日：2011-07-14

申请号：US12984715

申请日：2011-01-05

Applicant: Hiroshi KAYAMA ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Kazuo MOMOO

IPC: G11B7/085 ,  G11B21/08

CPC classification number: G11B7/0079 ,  G11B7/24085

Abstract: An optical disc drive according to the present invention writes information on an optical disc, which includes a substrate on which a number of pre-pits have been formed on its tracks and a recording film that is supported on the substrate. The optical disc drive includes a writing control section for instructing an optical pickup to record marks on the tracks by irradiating the recording film with a writing light beam. In accordance with information that defines, on the tracks, recordable areas Aa1 through Aa4 where the marks are recordable and pre-pit reading areas Ab1 through Ab4 where no marks are recordable, the writing control section controls the optical pickup so that the marks are recorded on at least some of the recordable areas. On the tracks on which the marks are recorded, each recordable area is shorter than any of the pre-pit reading areas.

Abstract translation: 根据本发明的光盘驱动器将信息写入到光盘上，该光盘包括在其轨道上形成有多个预凹坑的基板和支撑在基板上的记录膜。 光盘驱动器包括写入控制部分，用于通过用写入光束照射记录膜来指示光学拾取器在轨道上记录标记。 根据在轨迹上定义可记录标记的可记录区域Aa1至Aa4的信息，以及不记录标记的预凹坑读取区域Ab1至Ab4，写入控制部分控制光学拾取器，以便记录标记 至少在一些可记录区域。 在记录标记的轨道上，每个可记录区域比任何预读点区域短。

公开(公告)号：US20130077458A1

公开(公告)日：2013-03-28

申请号：US13542138

申请日：2012-07-05

Applicant: Noboru ITOH ,  Kazuo MOMOO

Inventor： Noboru ITOH ,  Kazuo MOMOO

IPC: G11B7/00

CPC classification number: G11B7/08505 ,  G11B7/003 ,  G11B7/14

Abstract: In one embodiment, an optical read/write apparatus includes first and second optical pickups 2a, 2b and a control section. The first optical pickup 2a includes a first lens 3a that condenses a light beam emitted from a first light source onto an optical storage medium, and a first lens actuator that can shift the first lens 3a in a track crossing section with respect to a middle position. The second optical pickup 2b includes a second lens 3b that condenses a light beam emitted from a second light source onto the optical storage medium, and a second lens actuator that can shift the second lens 3b in the track crossing section with respect to the middle position. The control section makes the lens actuators operate so that as the magnitude of shift of the first lens 3a increases, that of the second lens 3b decreases.

Abstract translation: 在一个实施例中，光学读/写设备包括第一和第二光学拾取器2a，2b和控制部分。 第一光拾取器2a包括将从第一光源发射的光束会聚到光存储介质上的第一透镜3a和能够相对于中间位置在轨道交叉部分移动第一透镜3a的第一透镜致动器 。 第二光学拾取器2b包括将从第二光源发射的光束会聚到光学存储介质上的第二透镜3b和可以使第二透镜3b相对于中间位置在轨道交叉部分移动的第二透镜致动器 。 控制部分使透镜致动器工作，使得随着第一透镜3a的移动量增大，第二透镜3b的移动幅度减小。

公开(公告)号：US20130051205A1

公开(公告)日：2013-02-28

申请号：US13398934

申请日：2012-02-17

Applicant: Jun-ichi ASADA ,  Kazuo MOMOO ,  Yohichi SAITOH

Inventor： Jun-ichi ASADA ,  Kazuo MOMOO ,  Yohichi SAITOH

IPC: G11B7/1353 ,  G11B7/1263

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

Abstract: 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.

Abstract translation: 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：US20120320727A1

公开(公告)日：2012-12-20

申请号：US13600386

申请日：2012-08-31

Applicant: Hiroaki MATSUMIYA ,  Kazuo MOMOO

Inventor： Hiroaki MATSUMIYA ,  Kazuo MOMOO

IPC: G11B7/135 ,  G11B7/1353

CPC classification number: G11B7/0903 ,  G11B7/003 ,  G11B7/00458 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1381 ,  G11B7/14 ,  G11B2007/0013

Abstract: 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.

Abstract translation: 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：US20100232272A1

公开(公告)日：2010-09-16

申请号：US12723777

申请日：2010-03-15

Applicant: Jun-ichi ASADA ,  Kazuo MOMOO

Inventor： Jun-ichi ASADA ,  Kazuo MOMOO

IPC: G11B7/135 ,  G11B20/10

CPC classification number: G11B7/1367 ,  G11B7/1275 ,  G11B2007/0006

Abstract: An optical pickup includes a wave plate on an optical path to be followed by every light beam emitted from three light sources (with wavelengths λ1, λ2 and λ3, respectively) both on their way toward an optical disc and back from the disc toward a photodetector. The wave plate has two layers with different retardations and different optic axis directions. The sum of the retardations of the first and second layers is defined to be approximately 5/4λ1, ¾λ2 and ½λ3 to the light beams with the wavelengths λ1, λ2 and λ3. Due to the difference in optic axis direction between the first and second layers, the linearly polarized light beams with the wavelengths λ1 and λ2 on their way toward the disc are transformed into circularly polarized light beams, which will be transformed again, on their way back from the disc, into linearly polarized light beams, of which the polarization direction is perpendicular to that of the light beams on their way toward the disc, thereby transmitting the light beam with the wavelength λ3 as a linearly polarized light beam both on its way toward, and back from, the disc.

Abstract translation: 光拾取器包括在光路上的波片，每个光束在三个光源（分别具有波长λ1，λ2和λ3）的两个光朝向光盘的方向发射，并且从光盘朝向光电检测器 。 波片具有不同延迟和不同光轴方向的两层。 第一和第二层的延迟的总和被定义为具有波长λ1，λ2和λ3的光束的大约5 /4λ1，¾λ2和½λ3。 由于第一和第二层之间的光轴方向的差异，波长为λ1和λ2的线性偏振光束朝向盘的方向被转换成圆偏振光束，这将在它们的回路上再次变换 从光盘到线性偏振光束，其偏振方向垂直于光束在朝向光盘的方向上的方向，从而将波长λ3的光束作为线偏振光束两端朝向 ，并从光盘回来。

公开(公告)号：US20090245068A1

公开(公告)日：2009-10-01

申请号：US12412630

申请日：2009-03-27

Applicant: Hiroshi KAYAMA ,  Kazuo MOMOO

Inventor： Hiroshi KAYAMA ,  Kazuo MOMOO

IPC: G11B7/00

CPC classification number: G11B7/1275 ,  G11B7/0903 ,  G11B7/131 ,  G11B2007/0006

Abstract: An optical pickup device according to the present invention includes: first and second light sources that are driven selectively and that emit blue and red light beams, respectively; an optical element for splitting the blue and red light beams emitted into main and sub-blue beams and main and sub-red beams, respectively; first and second photodetectors that receive the main and sub-blue beams reflected from the optical disc, thereby outputting electrical signals; and third and fourth photodetectors that receive the main and sub-red beams reflected from the optical disc, thereby outputting electrical signals. A dead zone that outputs no electrical signal representing the intensity of the light received is provided for respective parts of the second and fourth photodetectors.

Abstract translation: 根据本发明的光拾取装置包括：分别驱动并分别发射蓝光和红光的第一和第二光源; 用于分别发射到主蓝光束和副蓝光束的蓝色和红色光束的光学元件以及主和副红色光束; 第一和第二光电检测器，其接收从光盘反射的主和亚蓝色光束，从而输出电信号; 以及接收从光盘反射的主红光和次红光的第三和第四光电检测器，从而输出电信号。 针对第二和第四光电检测器的各个部分设置不输出表示所接收的光的强度的死区。