公开(公告)号：US20070159936A1

公开(公告)日：2007-07-12

申请号：US11646950

申请日：2006-12-28

申请人： Katsuo Iwata ,  Kazuhiro Nagata ,  Hideaki Okano

发明人： Katsuo Iwata ,  Kazuhiro Nagata ,  Hideaki Okano

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/0945 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1369

摘要： According to one embodiment, an optical head unit according to an embodiment of the invention, a reflected beam guided to a detection area of a photodetector is changed in the image forming characteristic by a liquid crystal element, which is placed between an object lens and a collimator lens, and provided with a controllable diffraction index, according to a spherical aberration amount corresponding to a thickness error in a protection layer of an optical disc and a comatic aberration amount corresponding to a disc tilt of an optical disc.

摘要翻译： 根据一个实施例，根据本发明的实施例的光学头单元，被引导到光电检测器的检测区域的反射光束通过液晶元件在图像形成特性中改变，该液晶元件被放置在物镜和 准直透镜，并且根据与光盘的保护层中的厚度误差相对应的球面像差量和对应于光盘的盘倾斜的彗形像差量，设置有可控衍射指数。

公开(公告)号：US20080212418A1

公开(公告)日：2008-09-04

申请号：US12022953

申请日：2008-01-30

申请人： Kazuhiro Nagata ,  Katsuo Iwata ,  Hideaki Okano

发明人： Kazuhiro Nagata ,  Katsuo Iwata ,  Hideaki Okano

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B19/12 ,  G11B2007/0013

摘要： According to one embodiment, an optical head device provides a signal processing circuit which sets a control amount to move an objective lens so that a distance between the objective lens and a given recording layer of the an optical disc coincides with a focal position, an optical path length correction mechanism which corrects an influence of an aberration component producing an error in the focal distance, a thickness difference detection circuit which finds an amount of correction to be made by the optical path length, and an aberration correction circuit which generates a correction signal to correct the influence of the aberration component producing the error in the focal distance detected by the thickness difference detection circuit, and supplies the correction signal to the optical path length correction mechanism.

摘要翻译： 根据一个实施例，光学头装置提供信号处理电路，其设置控制量以移动物镜，使得物镜与光盘的给定记录层之间的距离与焦点位置一致，光学 路径长度校正机构，其校正产生焦距误差的像差分量的影响;求出由光程长度求出的校正量的厚度差检测电路;以及产生校正信号的像差校正电路 以校正产生由厚度差检测电路检测的焦距的误差的像差分量的影响，并将校正信号提供给光路长度校正机构。

公开(公告)号：US20080186832A1

公开(公告)日：2008-08-07

申请号：US12023795

申请日：2008-01-31

申请人： Katsuo Iwata ,  Kazuhiro Nagata ,  Hideaki Okano

发明人： Katsuo Iwata ,  Kazuhiro Nagata ,  Hideaki Okano

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/0932 ,  G11B7/1369 ,  G11B2007/0006

摘要： According to an embodiment of the optical head unit includes two or more light sources, an objective lens which condenses the light beam having the predetermined wavelength output from each of the light sources to a recording layer of a recording medium, and captures a light beam reflected on the recording layer, a polarization control element arranged between the light sources and the objective lens, to optimize directions of polarization of the light beam having the predetermined wavelength output from the light source and the light beam reflected on the recording layer, in accordance with the wavelength thereof, on the basis of a voltage to be applied, a photodetector which receives the reflected light beam captured by the objective lens and outputs a predetermined signal, and a polarization controller which varies the direction of polarization set by the polarization control element, in accordance with the output of the photodetector, the fluctuations of the signals recorded and/or reproduced in each wavelength of the light beams with each of three kinds of optical discs different in recording density and format are stabilized.

摘要翻译： 根据光头单元的实施例包括两个或更多个光源，将从每个光源输出的具有预定波长的光束聚光到记录介质的记录层的物镜，并且捕获反射的光束 在记录层上，设置在光源和物镜之间的偏振控制元件，以优化具有从光源输出的预定波长的光束和记录层上反射的光束的光束的偏振方向，根据 基于要施加的电压的波长，接收由物镜捕获的反射光束并输出预定信号的光电检测器，以及改变由偏振控制元件设定的偏振方向的偏振控制器， 根据光电检测器的输出，记录的信号的波动和/或 在记录密度和格式不同的三种光盘中的每一种光束的每个波长中再生。

公开(公告)号：US20070064573A1

公开(公告)日：2007-03-22

申请号：US11519996

申请日：2006-09-11

申请人： Kazuhiro Nagata ,  Katsuo Iwata ,  Hideaki Okano

发明人： Kazuhiro Nagata ,  Katsuo Iwata ,  Hideaki Okano

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/0906 ,  G11B7/0916 ,  G11B7/0956

摘要： According to one embodiment, a diffraction pattern of a diffraction element, or a hologram polarization element, to guide a reflected laser beam divided into a predetermined number to a photodetector is combined preferably as one unit, in order to provide an optical head unit and an optical disc apparatus, which provides a stable reproducing signal, irrespectively of the standards of recording media, when reproducing information from a recording medium of optional standard. By using this diffraction pattern, it is possible to obtain outputs usable to detect first, second and third signals used to detect a tracking error when reproducing information recorded on an optical disc from a reflected laser beam from an optical disc, a fourth signal used to detect a focus error, and a fifth signal used to detect a disc tilt error and a spherical aberration compensating component.

摘要翻译： 根据一个实施例，衍射元件或全息偏振元件的衍射图案，用于将被分成预定数量的反射激光束引导到光电检测器，优选组合为一个单元，以便提供光学头单元和 光盘装置，当从可选标准的记录介质再现信息时，提供与记录介质的标准无关的稳定再现信号。 通过使用该衍射图案，可以获得可用于检测从用于从光盘反射的激光束再现记录在光盘上的信息时检测跟踪误差的第一，第二和第三信号的输出，第四信号用于 检测聚焦误差，以及用于检测光盘倾斜误差的第五信号和球面像差补偿分量。

公开(公告)号：US20070153647A1

公开(公告)日：2007-07-05

申请号：US11643305

申请日：2006-12-21

申请人： Satoru Maeda ,  Katsuo Iwata ,  Hideaki Okano

发明人： Satoru Maeda ,  Katsuo Iwata ,  Hideaki Okano

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/1353

摘要： According to one embodiment, an optical pick up apparatus according to an embodiment of the invention has an object lens which captures a light beam reflected on a recording surface of an optical disc, a polarization control element which divides a light beam captured by the object lens into a predetermined number of beams, and diffracts each divided beam in a predetermined direction, a photodetector which detects a light beam divided and diffracted by the polarization control element for each divided component, and a signal processor which calculates a tilt component along the radial direction of am optical disc, in an output of the photodetector, as a difference between a signal component indicating a change in the distance from the object lens to an optical disc, and a signal component indicating a position in the radial direction of a string of signal components recorded in an optical disc.

摘要翻译： 根据一个实施例，根据本发明的实施例的光学拾取装置具有捕获在光盘的记录表面上反射的光束的物镜，偏光控制元件，其将由物镜捕获的光束 成为预定数量的光束，并且沿预定方向衍射每个划分的光束;检测由每个分割成分的偏振控制元件分割和衍射的光束的光电检测器;以及信号处理器，其计算沿着径向的倾斜分量 作为指示从物镜到光盘的距离的变化的信号分量与指示信号串的径向位置的信号分量之间的差异，在光检测器的输出中， 记录在光盘中的组件。

公开(公告)号：US08614936B2

公开(公告)日：2013-12-24

申请号：US13410649

申请日：2012-03-02

申请人： Kazuo Watabe ,  Hideaki Okano ,  Takashi Usui ,  Chikara Tanioka ,  Akihito Ogawa ,  Kazuaki Doi

发明人： Kazuo Watabe ,  Hideaki Okano ,  Takashi Usui ,  Chikara Tanioka ,  Akihito Ogawa ,  Kazuaki Doi

IPC分类号： G11B7/09

CPC分类号： G11B7/14 ,  G11B7/0045 ,  G11B7/126 ,  G11B7/1376 ,  G11B7/24038 ,  G11B7/2405

摘要： According to one embodiment, a pickup head includes a plurality of light sources, a first objective lens, second objective lens, a driving unit, a first control unit, a second control unit, light receiving units. The first objective lens focuses a first light beam at a first recording layer. The second objective lens focuses a second light beam at a second recording layer. The driving unit moves the first objective lens and the second objective lens in a first direction and a second direction. The first control unit corrects displacement from target track along the first direction. The second control unit controls a moving direction of a position of the second light spot in the second direction.

摘要翻译： 根据一个实施例，拾取头包括多个光源，第一物镜，第二物镜，驱动单元，第一控制单元，第二控制单元，光接收单元。 第一物镜将第一光束聚焦在第一记录层。 第二物镜将第二光束聚焦在第二记录层。 驱动单元沿第一方向和第二方向移动第一物镜和第二物镜。 第一控制单元沿着第一方向校正与目标轨迹的位移。 第二控制单元控制第二光点在第二方向上的位置的移动方向。

公开(公告)号：US08437236B2

公开(公告)日：2013-05-07

申请号：US12409865

申请日：2009-03-24

申请人： Shinichi Tatsuta ,  Masataka Shiratsuchi ,  Hideaki Okano ,  Yuji Kubota

发明人： Shinichi Tatsuta ,  Masataka Shiratsuchi ,  Hideaki Okano ,  Yuji Kubota

IPC分类号： G11B7/00

CPC分类号： G11B7/00772 ,  G03H1/26 ,  G03H1/265 ,  G11B7/08564 ,  G11B7/128 ,  G11B7/1362 ,  G11B7/1365 ,  G11B7/1369

摘要： An optical information recording/reproducing apparatus includes a spatial light modulator that converts an irradiation beam emitted from a light source to a single information beam that carries information; an optical system that causes the single information beam to be collected on an optical-information recording medium including an information recording layer capable of recording the information as hologram by using interference fringes produced due to interference between the single information beam and a plurality of reference beams, and causes each of the reference beams to be irradiated to the optical-information recording medium from mutually different directions so as to intersect with the single information beam in the information recording layer; and a controller that controls to cause the light source to emit the irradiation beam and performs angular multiplexing recording of the information in the information recording layer while controlling to drive either one of the optical-information recording medium and the optical system.

摘要翻译： 一种光信息记录/再现装置，包括将从光源发射的照射光束转换为携带信息的单个信息光束的空间光调制器; 一种光学系统，其使得单个信息光束被收集在光学信息记录介质上，该光学信息记录介质包括能够通过使用由单个信息光束与多个参考光束之间的干涉而产生的干涉条纹将信息记录为全息图的信息记录层 并且使得每个参考光束从相互不同的方向照射到光学信息记录介质，以便与信息记录层中的单个信息光束相交; 以及控制器，其控制使光源发射照射光束，并且在控制驱动光信息记录介质和光学系统中的任一个的同时进行信息记录层中的信息的角度复用记录。

公开(公告)号：US20130100546A1

公开(公告)日：2013-04-25

申请号：US13805598

申请日：2011-06-10

申请人： Hideaki Okano

发明人： Hideaki Okano

IPC分类号： G02B9/60

CPC分类号： G02B9/60 ,  G02B13/0045

摘要： The present invention is to provide an imaging lens and an imaging device that achieve optical performance high enough for high-pixel imaging elements, and have the smallest possible sizes and thicknesses.A first lens having positive refractive power, an aperture stop, a second lens having positive or negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens having negative refractive power are provided in this order from the object side, and the following conditional expressions (1), (2), and (3) are satisfied: (1) 0.80

摘要翻译： 本发明是提供一种成像透镜和成像装置，其能够实现高像素成像元件的足够高的光学性能，并具有尽可能小的尺寸和厚度。 具有正屈光力的第一透镜，孔径光阑，具有正屈光力或负屈光力的第二透镜，具有负屈光力的第三透镜，具有正屈光力的第四透镜和具有负屈光力的第五透镜设置在该 满足以下条件表达式（1），（2）和（3）：（1）0.80

公开(公告)号：US20120147248A1

公开(公告)日：2012-06-14

申请号：US13285567

申请日：2011-10-31

申请人： Hideaki Okano

发明人： Hideaki Okano

IPC分类号： H04N5/225 ,  G02B15/14

CPC分类号： G02B9/34 ,  G02B13/004

摘要： An imaging lens includes: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power which is formed in a concave shape on both sides thereof; a third lens having a positive refractive power which is formed in a meniscus shape in which a concave surface is directed toward the side of an object; and a fourth lens having a negative refractive power in which a convex surface is directed toward the object side, which are sequentially disposed from the object side to the image side, wherein the imaging lens satisfies the following conditional expressions (1), (2), (3) and (4): 0.40 25.  (4)

摘要翻译： 成像透镜包括：孔径光阑; 具有正屈光力的第一透镜; 具有在其两侧形成为凹形的负屈光力的第二透镜; 具有正屈光力的第三透镜，其形成为弯曲面形状，其中凹面指向物体的侧面; 和（1），（2）所述的成像透镜，其中，所述成像透镜具有从物体侧朝向像侧依次配置的凸面朝向物体侧的负屈光力的第四透镜， ，（3）和（4）：0.40 25。 （4）

公开(公告)号：US20120008476A1

公开(公告)日：2012-01-12

申请号：US13238612

申请日：2011-09-21

申请人： Kazuto Kuroda ,  Kazuo Watabe ,  Hideaki Okano ,  Akihito Ogawa ,  Takashi Usui

发明人： Kazuto Kuroda ,  Kazuo Watabe ,  Hideaki Okano ,  Akihito Ogawa ,  Takashi Usui

IPC分类号： G11B7/135

CPC分类号： G11B7/083 ,  G11B7/08564 ,  G11B7/09 ,  G11B7/127

摘要： According to one embodiment, an information reproduction apparatus includes an information acquisition unit, an error detection unit, and a control unit. The information acquisition unit is configured to irradiate a reference beam, convert the reference beam into a luminance signal, and output the luminance signal when reproducing an information recording Medium. The error detection unit is configured to detect at least one selected from a first error and a second error by extracting a feature extraction quantity from the luminance signal. The first error is of an irradiation angle of the reference beam. The second error is of at least one selected from a temperature and a wavelength of the reference beam. The control unit is configured to control at least one selected from the irradiation angle and the at least one selected from the reproduction temperature and the wavelength of the reference beam using the second error.

摘要翻译： 根据一个实施例，信息再现设备包括信息获取单元，错误检测单元和控制单元。 信息获取单元被配置为照射参考光束，将参考光束转换成亮度信号，并且在再现信息记录介质时输出亮度信号。 误差检测单元被配置为通过从亮度信号提取特征提取量来检测从第一误差和第二误差中选出的至少一个。 第一误差是参考光束的照射角度。 第二误差是从参考光束的温度和波长中选出的至少一个。 控制单元被配置为使用第二误差来控制从照射角度和从再现温度和参考光束的波长中选择的至少一个中选择的至少一个。