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1. 发明申请

US20130051205A1 OPTICAL PICKUP AND OPTICAL READ/WRITE DRIVE 有权
标题翻译：光学拾取和光学读/写驱动
公开(公告)号：US20130051205A1
公开(公告)日：2013-02-28
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。

2. 发明申请

US20130077456A1 OPTICAL PICKUP AND OPTICAL READ/WRITE APPARATUS 有权
标题翻译：光学拾取和光学读/写设备
公开(公告)号：US20130077456A1
公开(公告)日：2013-03-28
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： G11B7/135 , G11B7/09 , G11B7/1353
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。

3. 发明申请

US20110002216A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE 审中-公开
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20110002216A1
公开(公告)日：2011-01-06
申请号：US12796788
申请日：2010-06-09
申请人： Hiroaki MATSUMIYA , Yoshitaka IMAOKA , Jun-ichi ASADA , Yuichi TAKAHASHI , Kazuo MOMOO
发明人： Hiroaki MATSUMIYA , Yoshitaka IMAOKA , Jun-ichi ASADA , Yuichi TAKAHASHI , Kazuo MOMOO
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1365 , G11B2007/0006
摘要： 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.
摘要翻译：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。

4. 发明申请

US20110276989A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DRIVE 审中-公开
标题翻译：光学拾取器件和光盘驱动器
公开(公告)号：US20110276989A1
公开(公告)日：2011-11-10
申请号：US12983990
申请日：2011-01-04
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： G11B7/135 , G11B19/20
CPC分类号： G11B7/1365 , G11B7/09 , G11B7/1381 , G11B2007/0006
摘要： 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.
摘要翻译：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。

5. 发明申请

US20100232272A1 WAVE PLATE, OPTICAL PICKUP AND OPTICAL DISC APPARATUS 有权
标题翻译：波片，光学拾取和光盘设备
公开(公告)号：US20100232272A1
公开(公告)日：2010-09-16
申请号：US12723777
申请日：2010-03-15
申请人： Jun-ichi ASADA , Kazuo MOMOO
发明人： Jun-ichi ASADA , Kazuo MOMOO
IPC分类号： G11B7/135 , G11B20/10
CPC分类号： G11B7/1367 , G11B7/1275 , G11B2007/0006
摘要： 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.
摘要翻译：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。

6. 发明申请

US20130083641A1 OPTICAL PICKUP DEVICE AND OPTICAL READ/WRITE APPARATUS 有权
标题翻译：光学拾取器件和光学读/写设备
公开(公告)号：US20130083641A1
公开(公告)日：2013-04-04
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： G11B7/09 , G11B7/127 , G11B7/1374 , G11B7/1353
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。

7. 发明申请

US20110170385A1 OPTICAL DISC DRIVE 有权
标题翻译：光盘驱动器
公开(公告)号：US20110170385A1
公开(公告)日：2011-07-14
申请号：US12983963
申请日：2011-01-04
申请人： Hiroshi KAYAMA , Kazuo MOMOO
发明人： Hiroshi KAYAMA , Kazuo MOMOO
IPC分类号： G11B7/00
CPC分类号： G11B7/00456 , G11B7/00745
摘要： 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.
摘要翻译：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。

8. 发明申请

US20110261670A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE 审中-公开
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20110261670A1
公开(公告)日：2011-10-27
申请号：US13020095
申请日：2011-02-03
申请人： Hiroaki MATSUMIYA , Kazuo MOMOO
发明人： Hiroaki MATSUMIYA , Kazuo MOMOO
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/1353 , G11B2007/0013
摘要： 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.
摘要翻译：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。

9. 发明申请

US20110002117A1 OPTICAL DISC DRIVE 审中-公开
标题翻译：光盘驱动器
公开(公告)号：US20110002117A1
公开(公告)日：2011-01-06
申请号：US12813671
申请日：2010-06-11
申请人： Hiroshi KAYAMA , Yuichi TAKAHASHI , Kazuo MOMOO
发明人： Hiroshi KAYAMA , Yuichi TAKAHASHI , Kazuo MOMOO
IPC分类号： F21V5/00
CPC分类号： G11B7/13922 , G11B7/0045 , G11B7/094
摘要： 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.
摘要翻译：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。

10. 发明申请

US20130077458A1 OPTICAL READ/WRITE APPARATUS 有权
标题翻译：光读/写设备
公开(公告)号：US20130077458A1
公开(公告)日：2013-03-28
申请号：US13542138
申请日：2012-07-05
申请人： Noboru ITOH , Kazuo MOMOO
发明人： Noboru ITOH , Kazuo MOMOO
IPC分类号： G11B7/00
CPC分类号： G11B7/08505 , G11B7/003 , G11B7/14
摘要： 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.
摘要翻译：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。

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