公开(公告)号：US08411548B2

公开(公告)日：2013-04-02

申请号：US12858520

申请日：2010-08-18

Applicant: Kazuhiko Nemoto ,  Katsuhiro Seo ,  Tamotsu Ishii

Inventor： Kazuhiko Nemoto ,  Katsuhiro Seo ,  Tamotsu Ishii

IPC: G11B7/13

CPC classification number: G11B7/133 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

Abstract: An optical pickup includes a light source emitting a light beam, a diffraction element diffracting the light beam to separate it into a main beam and a sub beam, an objective lens focusing the main and sub beams onto a desired recording layer of an optical disc, a lens moving section moving the objective lens in focusing and tracking directions, a light-separating element separating a reflected light beam, formed by reflecting each of the main and sub beams at the recording layer, into multiple beam components and allowing the reflected light beam to travel without rotating an image thereof, and a light-receiving element having multiple light-receiving regions that optically receive the reflected light beam and generating a light reception signal based on the amount of received light to allow a signal processing section to generate a focus error signal and a tracking error signal based on the light reception signal.

Abstract translation: 光拾取器包括发射光束的光源，衍射光束以将其分离成主光束和副光束的衍射元件，将主光束和子光束聚焦到光盘的期望记录层上的物镜， 在聚焦和跟踪方向移动物镜的透镜移动部分，将通过将记录层中的每个主光束和副光束反射而形成的反射光束分离成多个光束分量并允许反射光束 在不旋转图像的情况下行进;以及光接收元件，具有光接收反射光束的多个光接收区域，并且基于接收光量产生光接收信号，以允许信号处理部分产生焦点 误差信号和基于光接收信号的跟踪误差信号。

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：US08395982B2

公开(公告)日：2013-03-12

申请号：US13498312

申请日：2010-09-14

Applicant: Shogo Yamamoto ,  Kenichi Ishii ,  Takeshi Kojima ,  Kentarou Nakamura ,  Jinichi Kasuya

Inventor： Shogo Yamamoto ,  Kenichi Ishii ,  Takeshi Kojima ,  Kentarou Nakamura ,  Jinichi Kasuya

IPC: G11B7/135

CPC classification number: G11B7/1374 ,  B29D11/00009 ,  G11B7/1353 ,  G11B7/1367 ,  G11B2007/0006

Abstract: Provided is an optical pickup device capable of ensuring the compatibility among three types of optical discs, i.e., BDs, DVDs, and CDs, with a common objective lens and, in addition, capable of ensuring a sufficient working distance for CDs, and also provided are an optical information recording and reproducing device and an objective lens suitable for the optical information recording and reproducing device. On the objective lens, there is arranged a first optical path difference providing structure formed such that: the direction of step differences of a basic structure wherein the diffraction order of a blue-violet laser light flux become an odd order faces toward the opposite direction of the optical axis; the direction of step differences of a basic structure wherein the diffraction order of the blue-violet laser light flux become an even order faces toward the optical axis; and both the basic structures are overlapped together.

Abstract translation: 提供了一种光学拾取装置，其能够确保具有公共物镜的三种类型的光盘（即，BD，DVD和CD）之间的兼容性，并且还能够确保CD的足够的工作距离，并且还提供 是光学信息记录和再现装置以及适用于光学信息记录和再现装置的物镜。 在物镜上设置有第一光程差提供结构，其形成为：其中蓝紫色激光光束的衍射级变为奇数阶的基本结构的阶差的方向朝向相反方向 光轴; 其中蓝紫色激光光束的衍射级变为均匀的基本结构的阶差的方向面向光轴; 并且两者的基本结构重叠在一起。

公开(公告)号：US08395976B2

公开(公告)日：2013-03-12

申请号：US12272179

申请日：2008-11-17

Applicant: Kimihiro Saito ,  Hirotaka Miyamoto ,  Toshihiro Horigome

Inventor： Kimihiro Saito ,  Hirotaka Miyamoto ,  Toshihiro Horigome

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/00452 ,  G11B7/0053 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/0938 ,  G11B2007/0013

Abstract: An optical disc apparatus can make the focus of an information light beam converged by an objective lens agree with a target track of a target mark layer of an optical disc by appropriately predefining the distance between the focus of a servo light beam and that of the information light beam with regard to the direction of the thickness and a radial direction of the optical disc by means of the optical pickup of the apparatus and then operating for focus control and tracking control of the objective lens so as to make focus of the servo light beam converged by the objective lens agree with a reference track of a reference mark layer.

Abstract translation: 光盘装置可以通过适当地预先定义伺服光束的焦点与信息的焦点之间的距离，使由物镜会聚的信息光束的焦点与光盘的目标标记层的目标轨迹一致 通过装置的光学拾取器相对于厚度方向和光盘的径向方向的光束，然后操作用于物镜的聚焦控制和跟踪控制，以便使伺服光束的焦点 物镜会聚，与参考标记层的参考轨道一致。

公开(公告)号：US20130058199A1

公开(公告)日：2013-03-07

申请号：US13697075

申请日：2011-05-09

Applicant: Herbert Hoelzemann ,  Stephan Knappmann

Inventor： Herbert Hoelzemann ,  Stephan Knappmann

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

CPC classification number: G11B7/0903 ,  G11B7/1353 ,  G11B7/1395 ,  G11B7/14 ,  G11B7/24079

Abstract: The apparatus includes a pickup for reading data from a super-resolution optical disc, the pickup comprising a laser for generating a main beam, a first and a second satellite beam, the two satellite beams each having a radial offset with regard to the main beam, a third satellite beam following the first satellite beam, having the same radial offset as the first satellite beam, and a fourth satellite beam following the second satellite beam, having the same radial offset as the second satellite beam, for providing a crosstalk correction of the HF data signal. The track pitch between adjacent tracks of the optical disc is particularly below the diffraction limit of the pickup, and the light intensity of each of the first and second satellite beams and of the main beam is sufficient to provide a super-resolution effect on the optical disc and the light intensity of each of the third and fourth satellite beams is not sufficient to provide the super-resolution effect. The track pitch between adjacent tracks of the optical disc is advantageously below the diffraction limit of the pickup.

Abstract translation: 该装置包括用于从超分辨率光盘读取数据的拾取器，该拾取器包括用于产生主光束的激光器，第一和第二卫星光束，所述两个卫星光束相对于主光束具有径向偏移 跟随第一卫星光束的第三卫星光束具有与第一卫星光束相同的径向偏移，以及跟随第二卫星光束的第四卫星光束，具有与第二卫星光束相同的径向偏移，用于提供串扰校正 HF数据信号。 光盘的相邻轨道之间的轨道间距特别地低于拾取器的衍射极限，并且第一和第二卫星光束和主光束中的每一个的光强度足以提供对光学器件的超分辨率效果 并且第三和第四卫星光束中的每一个的光强度不足以提供超分辨率效果。 光盘的相邻轨道之间的轨道间距有利地低于拾取器的衍射极限。

公开(公告)号：US08374066B2

公开(公告)日：2013-02-12

申请号：US13088454

申请日：2011-04-18

Applicant: Kotaro Oishi ,  Toshiteru Nakamura

Inventor： Kotaro Oishi ,  Toshiteru Nakamura

IPC: G11B7/00

CPC classification number: G11B7/131 ,  G11B7/0903 ,  G11B7/1275 ,  G11B7/1353 ,  G11B2007/0006

Abstract: An optical pickup having a one-plane, two-wavelength diffraction grating and a two-wavelength laser generator is provided in which crosstalk noise caused by leakage of a track error signal into a focus error signal is reduced to improve focus control performance. A main beam and sub-beams generated by the one-plane, two-wavelength diffraction grating and reflected from the surface of an optical disc are incident on corresponding light receiving elements among which the one to receive the main beam and those to receive the sub-beams are relatively shifted in a linear-speed direction of the optical disc. The distance of the shifting is determined based on the characteristic, relative to the relative positions of the light receiving elements, of the leakage of the tracking error signal into the focus error signal detected based on the main beam and sub-beams.

Abstract translation: 提供了具有单平面双波长衍射光栅和双波长激光发生器的光学拾取器，其中由轨道误差信号泄漏引起的串扰噪声降低到聚焦误差信号中，以提高聚焦控制性能。 由单平面双波长衍射光栅产生并从光盘表面反射的主光束和子光束入射到相应的光接收元件，其中接收主光束的光束和接收子光束的光束 光束在光盘的线速度方向上相对移动。 基于相对于光接收元件的相对位置的跟踪误差信号的泄漏到基于主光束和子光束检测到的聚焦误差信号的特性来确定偏移的距离。

公开(公告)号：US20130003515A1

公开(公告)日：2013-01-03

申请号：US13518076

申请日：2010-12-07

Applicant: Stephan Knappmann ,  Frank Przygodda

Inventor： Stephan Knappmann ,  Frank Przygodda

IPC: G11B7/1353

CPC classification number: G11B7/0956 ,  G11B7/0948 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1387 ,  G11B7/13925

Abstract: An apparatus for reading from or writing to a near-field optical recording medium capable of detecting tilt and spherical aberration is described. The apparatus comprises a light source for generating a reading light beam, a near-field lens, an aberration compensation element, and a diffractive optical element. The diffractive optical element is switchable between a far-field mode and a near-field mode and is adapted to generate a main light beam and four or more sub-beams from the reading light beam for determining at least a cover layer thickness error signal. For this purpose it has an outer region with a first grating period and an inner region having a diameter smaller than an effective numerical aperture of the near-field lens, which in the near-field mode has a second grating period and which has a switchable inner area having a diameter smaller than a far-field numerical aperture of the near-field lens, which in the far-field mode has the first grating period. The aberration compensation element is adapted to be adjusted based on the thickness error signal when the diffractive optical element is in the near-field mode.

Abstract translation: 描述了一种用于读取或写入能够检测倾斜和球面像差的近场光学记录介质的装置。 该装置包括用于产生读取光束的光源，近场透镜，像差补偿元件和衍射光学元件。 衍射光学元件可以在远场模式和近场模式之间切换，并且适于从读取光束产生主光束和四个或更多个子光束，用于至少确定覆盖层厚度误差信号。 为此，它具有具有第一光栅周期的外部区域和具有小于近场透镜的有效数值孔径的直径的内部区域，其在近场模式中具有第二光栅周期并且具有可切换的 内部区域的直径小于近场透镜的远场数值孔径，其在远场模式中具有第一光栅周期。 当衍射光学元件处于近场模式时，像差补偿元件适于基于厚度误差信号进行调整。

公开(公告)号：US08345528B2

公开(公告)日：2013-01-01

申请号：US12872276

申请日：2010-08-31

Applicant: Kenji Nagatomi

Inventor： Kenji Nagatomi

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/131 ,  G11B7/1381 ,  G11B2007/0006

Abstract: An optical pickup device includes an objective lens portion which converges laser light at a first focal point and a second focal point; an actuator which positions the first focal point or the second focal point on a recording layer in a disc; an astigmatism element which sets a first focal line position and a second focal line position of the laser light reflected on the disc away from each other in a propagating direction of the laser light; a spectral element which disperses four light fluxes obtained by dividing the laser light reflected on the disc in four from each other; and a photodetector having a sensor group which receives the four light fluxes dispersed by the spectral element.

Abstract translation: 一种光学拾取装置，包括在第一焦点和第二焦点处会聚激光的物镜部分; 致动器，其将所述第一焦点或所述第二焦点定位在盘中的记录层上; 设置在激光的传播方向上在盘上反射的激光的第一焦线位置和第二焦线位置彼此远离的散光元件; 将通过将在盘上反射的激光分割成四个而获得的四个光束的光谱元件彼此分成四个; 以及具有传感器组的光电检测器，其接收由光谱元件分散的四个光通量。

公开(公告)号：US20120314557A1

公开(公告)日：2012-12-13

申请号：US13490272

申请日：2012-06-06

Applicant: Masaharu Fukakusa

Inventor： Masaharu Fukakusa

IPC: G11B7/1353

CPC classification number: G11B7/1353 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/1275 ,  G11B7/131 ,  G11B2007/0006

Abstract: In an optical pickup device for both CD and DVD disk media using a two-wavelength laser diode (1), a diffraction grating (11) is commonly used for both laser beams (L1, L2) for CD and DVD to diffract each laser beam into a main beam and a pair of side beams. The diffraction grating includes a first diffraction grating region (11a) and a second diffraction grating region (11b) having a same pitch as the first diffraction grating region and being laterally offset from the first diffraction grating region, and at least one of the first and a second laser beams are diffracted by both of the first and second diffraction grating regions.

Abstract translation: 在用于使用双波长激光二极管（1）的CD和DVD盘介质的光学拾取装置中，衍射光栅（11）通常用于CD和DVD的两个激光束（L1，L2）以衍射每个激光束 成为主梁和一对侧梁。 衍射光栅包括第一衍射光栅区域（11a）和与第一衍射光栅区域具有相同间距并且与第一衍射光栅区域横向偏移的第二衍射光栅区域（11b），并且第一和第 第二激光束被第一和第二衍射光栅区域两者衍射。

公开(公告)号：US08318057B2

公开(公告)日：2012-11-27

申请号：US10647262

申请日：2003-08-26

Applicant: Brian Harden ,  Alan Kathman ,  Michael Feldman

Inventor： Brian Harden ,  Alan Kathman ,  Michael Feldman

IPC: B29D11/00

CPC classification number: G02B5/1819 ,  G02B3/0006 ,  G02B6/4206 ,  G02B6/4214 ,  G02B6/4224 ,  G02B6/4231 ,  G02B6/4232 ,  G02B6/4238 ,  G02B6/4239 ,  G02B13/0085 ,  G02B2006/12102 ,  G02B2006/12107 ,  G03F9/7042 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1362 ,  G11B7/1372 ,  G11B7/22 ,  G11B2007/13727 ,  H01L25/167 ,  H01L27/14625 ,  H01L27/14632 ,  H01L27/14687 ,  H01L2924/0002 ,  H01S5/0201 ,  H01S5/02248 ,  Y10T156/1052 ,  Y10T156/1089 ,  Y10T156/1092 ,  H01L2924/00

Abstract: Integrated multiple optical elements may be formed by bonding substrates containing such optical elements together or by providing optical elements on either side of the wafer substrate. The wafer is subsequently diced to obtain the individual units themselves. The optical elements may be formed lithographically, directly, or using a lithographically generated master to emboss the elements. Alignment features facilitate the efficient production of such integrated multiple optical elements, as well as post creation processing thereof on the wafer level.

Abstract translation: 集成的多个光学元件可以通过将包含这种光学元件的基板结合在一起或通过在晶片基板的任一侧上设置光学元件来形成。 随后切割晶片以获得单独的单元。 光学元件可以光刻地，直接地或使用光刻产生的主体来压印元件。 对准特征有助于这种集成的多个光学元件的有效生产，以及在晶片级上的后创建处理。