公开(公告)号：US20050122857A1

公开(公告)日：2005-06-09

申请号：US10995089

申请日：2004-11-23

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Ikuya Kikuchi ,  Katsuhiro Koike

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Ikuya Kikuchi ,  Katsuhiro Koike

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1369 ,  G11B7/1376 ,  G11B7/1392

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/1376 ,  G11B2007/0006

摘要： When recording/reading information data onto/from a recording medium by irradiating the recording medium with a first light beam, correction for decreasing the amount of spherical aberration is made just before the recording or reading. On the other hand, when recording/reading information data onto/from a recording medium by irradiating the recording medium with a second light beam, focus correction for correctly condensing the reflected light from the recording medium on the light receiving surface of a photodetector is made just before the recording or reading.

摘要翻译： 当通过用第一光束照射记录介质来记录/读取记录介质上的信息数据时，在记录或读取之前进行用于减小球面像差量的校正。 另一方面，当通过用第二光束照射记录介质来将信息数据记录/从记录介质读取信息数据时，进行用于将来自记录介质的反射光正确地聚集在光电检测器的光接收表面上的聚焦校正 就在录音或阅读之前。

公开(公告)号：US20100220576A1

公开(公告)日：2010-09-02

申请号：US11993121

申请日：2006-06-13

申请人： Ikuya Kikuchi ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Ikuya Kikuchi ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/135

CPC分类号： G11B7/0901 ,  G11B7/0906 ,  G11B7/1353 ,  G11B7/1381

摘要： The present invention makes possible a compact optical pickup device that eliminates effects due to the position where a sub beam is projected during tracking compensation, and provides for stable tracking compensation.A diffraction grating 12 in the optical pickup device PU gives an astigmatism to a sub beam (either of ±1-dimensional light), and shines that sub beam onto an optical disc DK. Also, a tracking error signal Ste is obtained by subtracting a push-pull signal PPsub that corresponds to a sub beam from a push-pull signal PPmain that corresponds to a main beam (0-dimensional light), and tracking compensation is performed based on that tracking error signal Ste.

摘要翻译： 本发明使得可以消除由于在跟踪补偿期间投影子光束的位置而产生的影响的紧凑型光学拾取装置，并提供稳定的跟踪补偿。 光学拾取装置PU中的衍射光栅12给子光束（±1维光）的散光，并将该子光束照射到光盘DK上。 此外，通过从对应于主波束（0维光）的推挽信号PPmain中减去与子波对应的推挽信号PPsub来获得跟踪误差信号Ste，并且基于 跟踪误差信号Ste。

公开(公告)号：US20080232203A1

公开(公告)日：2008-09-25

申请号：US10593649

申请日：2005-03-17

申请人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0948 ,  G11B7/1275 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.

摘要翻译： 响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束， 检测元件。 为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。 在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。 因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

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：US07453787B2

公开(公告)日：2008-11-18

申请号：US10593649

申请日：2005-03-17

申请人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0948 ,  G11B7/1275 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.

摘要翻译： 响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束， 检测元件。 为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。 在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。 因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

公开(公告)号：US07139234B2

公开(公告)日：2006-11-21

申请号：US10713038

申请日：2003-11-17

申请人： Masakazu Ogasawara ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Ikuya Kikuchi

IPC分类号： G11B7/135

CPC分类号： G11B7/1369 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup is provided for recording and reproduction of information onto and from an optical disk. In the optical disk, in a forward optical path, a single polarized optical beam is converted to plural polarized optical beams. Polarization modes of the plural polarized optical beams are then converted to a polarization mode suitable for one of the recording and the reproduction to produce polarization-converted optical beams and to radiate the polarization-converted optical beams to the disk. In the backward optical path, polarization modes of the polarization-converted optical beams reflected from the disk are returned to the same polarization mode as that of the plural polarized optical beams, so that plural polarized reflected optical beams are produced. Polarization modes of the plural polarized reflected optical beams are then returned to the same polarization mode as the single polarized optical mode.

摘要翻译： 提供了用于在光盘上记录和再现信息的光学拾取器。 在光盘中，在正向光路中，单个偏振光束被转换为多个偏振光束。 然后将多个偏振光束的极化模式转换为适合于记录和再现之一的偏振模式，以产生偏振转换的光束，并将偏振转换的光束辐射到光盘。 在反向光路中，从盘反射的偏振光转换光束的偏振模式返回到与多个偏振光束相同的偏振模式，从而产生多个偏振反射光束。 然后，多个偏振反射光束的极化模式返回到与单偏振光学模式相同的偏振模式。

公开(公告)号：US07944797B2

公开(公告)日：2011-05-17

申请号：US12294455

申请日：2007-03-14

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G11B7/00

CPC分类号： G11B7/00781 ,  G11B7/0065

摘要： A recording method which optically records two-dimensional data including a positioning mark and data area in a recording medium. In this method, the state of the positioning mark is changed from a first state to at least one second state different from the first state every given number of recording times of such two-dimensional data.

摘要翻译： 一种记录方法，其将包括定位标记和数据区的二维数据光记录在记录介质中。 在该方法中，定位标记的状态从这样的二维数据的每给定数量的记录次数从第一状态改变为与第一状态不同的至少一个第二状态。

公开(公告)号：US07821899B2

公开(公告)日：2010-10-26

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：US20100177619A1

公开(公告)日：2010-07-15

申请号：US12376595

申请日：2006-10-04

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A pickup device which, focusing a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, comprises a detection optical system including a photo detector to receive return light reflected from the light spot via an objective lens and perform photoelectric conversion. The photo detector has at least two photoreceptor sections positioned axis-symmetrical with respect to a detection-side division line extending through an optical axis of the return light and parallel to the track. A dividing element placed in an optical path between the photo detector and the objective lens includes at least two inner divided areas positioned axis-symmetrical with respect to a deflection-side division line extending through the optical axis of the return light and parallel to the track, and at least two outer divided areas positioned sandwiching the inner divided areas and axis-symmetrical with respect to the deflection-side division line. The inner divided areas are formed such that parts of a light beam from the other region than overlap regions, divided axis-symmetrically along the deflection-side division line, are exchanged in position across the detection-side division line and directed to the photoreceptor sections of the photo detector so as to be axis-symmetrical with respect to the detection-side division line.

摘要翻译： 一种拾取装置，其将光束聚焦在光记录介质的记录表面的轨道上以形成光点，包括检测光学系统，其包括光电检测器，以接收经由物镜从光点反射的返回光;以及 执行光电转换。 光检测器具有至少两个相对于延伸通过返回光的光轴并平行于轨道的检测侧分割线轴对称的感光体部分。 放置在光检测器和物镜之间的光路中的分隔元件包括至少两个相对于延伸穿过返回光的光轴并平行于轨道的偏转侧分割线轴对称的内分割区域 以及至少两个外分割区域，其定位为夹着内分割区域并相对于偏转侧分割线轴对称。 内部分割区域被形成为使得来自另一区域的光束的部分比沿着偏转侧分割线轴对称分割的重叠区域的部分在检测侧分割线上交替位置并且被引导到感光体部分 的光检测器相对于检测侧分割线轴对称。

公开(公告)号：US07643094B2

公开(公告)日：2010-01-05

申请号：US10577031

申请日：2004-10-27

申请人： Masahiro Kawashima ,  Masanobu Tanaka ,  Masakazu Ogasawara

发明人： Masahiro Kawashima ,  Masanobu Tanaka ,  Masakazu Ogasawara

IPC分类号： H04N9/73

CPC分类号： G09G5/02 ,  G09G3/2003 ,  G09G2300/0443 ,  G09G2320/0242 ,  G09G2340/06

摘要： A color image processing apparatus performs color image display using a red display, green display, blue display and white display. The apparatus includes a white signal generation circuit generating a white signal W based on an input red signal Rin for the red display, an input green signal Gin for the green display, and an input blue signal Bin for the blue display, a yellow signal generation circuit generating a yellow signal Ye, based on the input red signal Rin, the input green signal Gin, and the generated white signal W, and a first output white signal generation circuit generating a first output white signal Wout(1) for the white display, based on the generated white signal W and the generated yellow signal Ye.

摘要翻译： 彩色图像处理装置使用红色显示，绿色显示，蓝色显示和白色显示来执行彩色图像显示。 该装置包括基于用于红色显示的输入红色信号Rin，用于绿色显示的输入绿色信号Gin和用于蓝色显示的输入蓝色信号Bin，产生黄色信号生成的白色信号产生电路 基于输入红色信号Rin，输入绿色信号Gin和产生的白色信号W产生黄色信号Ye的电路以及产生用于白色显示的第一输出白色信号Wout（1）的第一输出白色信号产生电路 基于产生的白色信号W和生成的黄色信号Ye。