公开(公告)号：US20090268267A1

公开(公告)日：2009-10-29

申请号：US12441831

申请日：2006-10-11

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/26

CPC分类号： G11B7/0065 ,  G03H2250/40 ,  G11B7/00781 ,  G11B7/08564 ,  G11B7/0938

摘要： A hologram recording carrier that information is recorded into or reproduced from by irradiating light, comprises a hologram recording layer to store an optical interference pattern by coherent reference light and signal light as a hologram therein; and a servo layer laid on top of the hologram recording layer in a film thickness direction, multiple marks being recorded beforehand on the servo layer. The multiple marks form lines as multiple mark rows extending in a direction parallel to a relative movement direction of a light spot of a hologram recording beam irradiated on the hologram recording carrier.

摘要翻译： 信息被记录或通过照射光再现的全息记录载体包括全息图记录层，用于通过相干参考光和信号光作为全息图存储光学干涉图案; 以及在膜厚度方向上放置在全息图记录层顶部的伺服层，预先在伺服层上记录多个标记。 该多重标记形成为沿着平行于照射在全息图记录载体上的全息图记录光束的光点的相对移动方向的方向延伸的多个标记行。

公开(公告)号：US20090262408A1

公开(公告)日：2009-10-22

申请号：US12065235

申请日：2006-08-03

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/04

CPC分类号： G11B7/0065 ,  G03H2222/31 ,  G11B7/083 ,  G11B7/1374

摘要： An optical pickup apparatus includes a light source for generating a coherent beam, a spatial light modulator having a central region arranged on an optical axis of the coherent beam and an annular region arranged in a manner surrounding the central region, to spatially separate a transmission component of the coherent beam through the central region and a transmission component through the annular region thereby producing a reference beam and a signal beam and propagating those coaxially in a same direction, an objective lens optical system arranged on the optical axis and for illuminating the signal beam and the reference beam coaxially toward the hologram record layer and causing the reference beam and the signal beam to focus on focal points different from each other, image detecting means arranged on the optical axis and for receiving a beam returning from the hologram record layer through the objective lens optical system when the reference beam is illuminated to the hologram record layer; and a polarization-plane rotating device having a central polarizing region arranged on the optical axis and an annular polarizing region arranged in a manner surrounding the central polarizing region and for making transmission components through the central and annular polarizing regions different in rotation angle on the polarization plane from each other.

摘要翻译： 光学拾取装置包括用于产生相干光束的光源，具有布置在相干光束的光轴上的中心区域的空间光调制器和以围绕中心区域的方式布置的环形区域，以空间分离透射部件 通过中心区域的相干光束和通过环形区域的透射分量，从而产生参考光束和信号光束并沿相同方向同轴传播;物镜光学系统，布置在光轴上并用于照射信号光束 和参考光束同轴地朝向全息图记录层，并使参考光束和信号光束聚焦在彼此不同的焦点上，图像检测装置被布置在光轴上，并且用于接收从全息图记录层返回的光束 当参考光束照射到全息图时，物镜光学系统 ord层 以及具有布置在光轴上的中心偏振光区域的偏振面旋转装置和以围绕中央偏振区域的方式布置的环形偏振光区域，并且用于使透射分量通过偏振角不同的中心和环形偏振光区域 飞机从彼此。

公开(公告)号：US07586829B2

公开(公告)日：2009-09-08

申请号：US10967331

申请日：2004-10-19

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G11B7/24

CPC分类号： G11B7/08511 ,  G11B7/0033 ,  G11B7/24038 ,  G11B2007/0013

摘要： A multilayer optical recording medium includes a plurality of recording layers that are laminated and have recording layer forming units into which information is recorded. Reflective film forming units are formed on parts of the respective recording layers and have a reflectance ratio sufficient to make a servo loop of a focus servo into a servo close condition. Reflective film forming units of the respective recording layers are arranged at respectively different positions.

摘要翻译： 多层光记录介质包括层叠的多个记录层，并具有记录信息的记录层形成单元。 反射膜形成单元形成在各个记录层的部分上，并具有足以使聚焦伺服的伺服回路成为伺服闭合状态的反射率。 各记录层的反射膜形成单元分别设置在不同的位置。

公开(公告)号：US20090141325A1

公开(公告)日：2009-06-04

申请号：US11885780

申请日：2006-03-06

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G03H1/10 ,  G03H1/04

CPC分类号： G11B7/083 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2210/22 ,  G03H2223/24 ,  G11B7/0065 ,  G11B7/0909 ,  G11B7/128 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/139

摘要： A hologram apparatus capable of recording and reproduction of a recording medium with stability. The hologram apparatus includes: a suspension unit for holding a recording medium in a freely mountable fashion, the recording medium storing an optical interference pattern inside as a diffraction grating; a reference light optical system for emitting reference light toward the recording medium; and a signal light optical system for emitting signal light toward the recording medium, being arranged on a side opposite from the reference light optical system coaxially across the recording medium, the diffraction grating being formed by opposite irradiation of the recording medium with the signal light and the reference light. The hologram apparatus has: an objective lens for condensing the reference light with a first numerical aperture; and a spatial light modulation device for generating the signal light from the reference light past the recording medium and making it pass through the recording medium with a second numerical aperture different from the first numerical aperture, the signal light being modulated according to recorded information.

摘要翻译： 能够稳定地记录和再现记录介质的全息图设备。 全息图装置包括：用于以可自由安装的方式保持记录介质的悬挂单元，记录介质作为衍射光栅存储光学干涉图案; 用于向记录介质发射参考光的参考光学光学系统; 以及用于向记录介质发射信号光的信号光学光学系统，被布置在同基准光学系统的与记录介质同轴的一侧上，衍射光栅通过记录介质与信号光的相反照射形成， 参考灯。 该全息图装置具有：用于将参考光与第一数值孔相聚的物镜; 以及空间光调制装置，用于产生来自参考光的信号光通过记录介质并使其通过具有不同于第一数值孔径的第二数值孔径的记录介质，信号光根据记录信息进行调制。

公开(公告)号：US20090129235A1

公开(公告)日：2009-05-21

申请号：US11996430

申请日：2006-07-03

申请人： Takuma Yanagisawa ,  Masakazu Ogasawara

发明人： Takuma Yanagisawa ,  Masakazu Ogasawara

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/1353

摘要： The present invention provides an optical pickup device requiring no position adjustment of a diffraction grating at the time of assembling the optical pickup device, and capable of suppressing fluctuations in a differential push-pull signal amplitude and cancelling a push-pull offset.An optical pickup device 200 of an embodiment of the present invention has a diffraction grating 230 of a special shape including predetermined grooves and two kinds of lattice grooves arranged at a pitch determined on the basis of a pitch of grooves formed in the surface of an optical disk 50, numerical aperture, wavelength of a light beam, and effective diameter of the light beam applied on the optical disk 50. To suppress push-pull signals generated in the ± first-order diffraction rays, reflection rays from the optical disk 50 of a zeroth-order diffraction ray and ± first-order diffraction rays are detected, and signals corresponding to light reception results are output to a reproduction unit 150, a control unit 130, and an actuator servo circuit 140.

摘要翻译： 本发明提供了一种在组装光学拾取装置时不需要对衍射光栅进行位置调整并且能够抑制差分推挽信号振幅的波动并取消推挽偏移的光学拾取装置。 本发明实施例的光学拾取装置200具有特殊形状的衍射光栅230，该衍射光栅230包括预定的凹槽和两个格栅槽，它们以基于在光学器件表面形成的凹槽的间距所确定的间距 盘50，数值孔径，光束波长和施加在光盘50上的光束的有效直径。为了抑制在±一级衍射光线中产生的推挽信号，来自光盘50的反射光线 检测到零级衍射线和±一级衍射线，并且将对应于光接收结果的信号输出到再现单元150，控制单元130和致动器伺服电路140。

公开(公告)号：US20080170486A1

公开(公告)日：2008-07-17

申请号：US11885504

申请日：2006-02-28

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G11B7/135 ,  G11B7/09 ,  G11B7/0065 ,  G11B7/125

CPC分类号： G11B7/0065 ,  G11B7/083 ,  G11B7/128 ,  G11B7/1353 ,  G11B7/1362 ,  G11B7/1378

摘要： An optical pickup device is constituted to enable stable recording or reproduction on/from a recording medium. The optical pickup device has an irradiation optical system for condensing a light beam using an objective lens, and comprises: a reflection portion disposed opposite the irradiation optical system, on a common optical axis therewith, and at a remove therefrom, for reflecting and returning the light beam toward the irradiation optical system; a phase plate disposed on the optical axis, for generating light on the optical axis, and light having a modified polarization state on all or a part of the periphery of the light on the optical axis, separately from the light beam; a detection optical system disposed on the optical axis, for extracting the light having a modified polarization state from return light of the light beam and guiding the extracted light to a photodetector; and a reflection portion driving portion for positioning the reflection portion on the basis of a photoelectric conversion output from the photodetector.

摘要翻译： 光学拾取装置被构造成能够在记录介质上进行稳定的记录或再现。 光学拾取装置具有用于使用物镜聚光的照射光学系统，并且包括：与照射光学系统相对设置在与其共同的光轴上的反射部分，并从其上移除，用于反射和返回 光束朝向照射光学系统; 设置在光轴上的用于在光轴上产生光的相位板和在光轴上与光束分开的在光的周边的全部或一部分上具有改变的偏振状态的光; 检测光学系统，设置在所述光轴上，用于从所述光束的返回光中提取具有改变的偏振状态的光并将所述提取的光引导到光电检测器; 以及反射部分驱动部分，用于基于来自光电检测器的光电转换输出来定位反射部分。

公开(公告)号：US20080055713A1

公开(公告)日：2008-03-06

申请号：US11587935

申请日：2005-04-14

申请人： Masakazu Ogasawara ,  Shinichi Fujinoki

发明人： Masakazu Ogasawara ,  Shinichi Fujinoki

IPC分类号： G02F1/29

CPC分类号： G02F1/061 ,  G02F1/134309 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/0956 ,  G11B7/1369 ,  G11B7/13927

摘要： The present invention is to provide an improved aberration correction device formed by inserting an electro-optic panel such as a liquid crystal panel in an image-formation optical system to correct aberrations in the image-formation optical system, characterized in that such a correction device is capable of correcting three or more kinds of aberrations using only one electro-optic panel. Divided areas concerning coma aberration correction and divided areas concerning astigmatism correction are formed in one of the transparent electrodes of the electro-optic panel, while the rest of divided areas concerning coma aberration correction and divided areas concerning spherical aberration correction are formed in the other of the transparent electrodes. In this way, it is possible to form divided areas divided into electrode patterns suitable for correcting various aberrations, simplify as much as possible the electrode structure of the transparent electrodes consisting of the divided areas, thereby simplifying a control of voltages to be applied to the divided areas.

摘要翻译： 本发明提供一种改进的像差校正装置，其通过将图像形成光学系统中的诸如液晶面板的电光面板插入以校正图像形成光学系统中的像差而形成，其特征在于，这种校正装置 能够仅使用一个电光面板来校正三种或更多种像差。 在电光面板的一个透明电极中形成有关于彗形像差校正的分割区域和散光校正的分割区域，而关于彗差校正的其余分割区域和关于球面像差校正的分割区域形成在另一个 透明电极。 以这种方式，可以形成分为适合于校正各种像差的电极图案的划分区域，尽可能地简化由分割区域构成的透明电极的电极结构，从而简化对施加到该区域的电压的控制 分区。

公开(公告)号：US07151595B2

公开(公告)日：2006-12-19

申请号：US10679500

申请日：2003-10-07

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G01B9/00

CPC分类号： G11B7/1376 ,  G11B7/0908 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/13927

摘要： A focus error detecting device for an optical pickup having an aberration correcting lens group includes a diffraction optical element having an outer diameter which is smaller than a diameter of the light beam after aberration correction, and selectively diffracting light passing through an annular portion with an optical axis as a center in a plane perpendicular to the optical axis of the light beam; and a photodetector which detects the light diffracted by the diffraction optical element. The annular portion includes a portion in which residual ray aberration after aberration correction by the lens group is the smallest.

摘要翻译： 用于具有像差校正透镜组的光学拾取器的聚焦误差检测装置包括具有小于像差校正后的光束直径的外径的衍射光学元件，并且选择性地衍射通过光学器件的环形部分的光 轴作为垂直于光束的光轴的平面中的中心; 以及光检测器，其检测由衍射光学元件衍射的光。 环状部包括透镜组的像差校正后的残留光线像差最小的部分。

公开(公告)号：US07016269B2

公开(公告)日：2006-03-21

申请号：US10022843

申请日：2001-12-20

申请人： Masakazu Ogasawara ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/08511 ,  G11B7/0909 ,  G11B7/0912 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/0946 ,  G11B7/131 ,  G11B2007/0013

摘要： An optical pickup apparatus having an irradiation optical system for condensing a light beam on a track of a recording plane and a photodetection optical system for guiding return light to a photodetector to detect a focal error includes a holographic lens provided in the optical path of the return light for outputting 0-th and ±1st order diffracted lights based on the return light; an optical element provided in front of or behind the holographic lens for providing astigmatism; photodetectors for receiving the 0-th and ±1st order diffracted lights; and servo-signal generating operation circuits connected to the photodetectors for generating a first and second focus error signals having a first and second capture ranges based on the output signal of the photodetector.

公开(公告)号：US07012722B2

公开(公告)日：2006-03-14

申请号：US11004129

申请日：2004-12-06

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/00

CPC分类号： G11B7/128 ,  G11B7/0065 ,  G11B7/0945 ,  G11B7/13

摘要： A holographic recording apparatus which can stably record data to be recorded onto a recording medium. The holographic recording apparatus of the present invention includes: a light source for generating a coherent reference light beam; a signal light generation unit including a spatial light modulator for spatially modulating the reference light beam in accordance with information data to generate a signal light beam; an interference unit for directing the signal light beam and the reference light beam toward a recording medium through an objective lens to form a region of a diffraction grating formed by an optical interference pattern within the recording medium; a lens positioning unit for positioning the objective lens with respect to a recording surface of the recording medium; and a light-receiving unit for detecting a returned beam that is returned from the recording medium through the objective lens. The signal light generation unit includes correction unit for detecting an amount of an optical positional offset between a recording data setting area in the spatial light modulator being supplied with said information data and an aperture area of the objective lens, and for adjusting a position of the recording data setting area in accordance with the amount of a optical positional offset.

摘要翻译： 一种能够稳定地记录要记录在记录介质上的数据的全息记录装置。 本发明的全息记录装置包括：用于产生相干参考光束的光源; 信号光生成单元，其包括用于根据信息数据空间调制参考光束的空间光调制器，以产生信号光束; 干涉单元，用于通过物镜将信号光束和参考光束引向记录介质，以形成由记录介质内的光学干涉图形形成的衍射光栅的区域; 透镜定位单元，用于相对于记录介质的记录表面定位物镜; 以及光接收单元，用于检测通过物镜从记录介质返回的返回光束。 信号光产生单元包括校正单元，用于检测被提供有所述信息数据的空间光调制器中的记录数据设置区域和物镜的孔径区域之间的光学位置偏移量，并且用于调整 记录数据设定区域与光学位置偏移量相对应。