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1. 发明授权

US06218655B1 Optical pickup 有权
标题翻译：光学拾音
公开(公告)号：US06218655B1
公开(公告)日：2001-04-17
申请号：US09271624
申请日：1999-03-17
申请人： Masakazu Ogasawara , Sakashi Ohtaki , Kiyoshi Tateishi
发明人： Masakazu Ogasawara , Sakashi Ohtaki , Kiyoshi Tateishi
IPC分类号： G02B2740
CPC分类号： G11B7/1353 , G11B7/005 , G11B7/0901 , G11B7/131
摘要： An optical pickup for irradiating a light beam onto an information recording medium and receiving a light reflected by the medium, includes a light source for emitting a light beam, and a liquid crystal panel for diffracting the light beam to produce a main beam and a plurality of sub-beams to be irradiated on the medium. The liquid crystal panel included a first area in which a first group of grating patterns with predetermined pitches is formed and a second area in which a second group of grating patterns having the predetermined pitches is formed, and the first group of grating patterns and the second group of grating patterns are arranged on a plane with a gap area formed between the first area and the second area so as to form an integrated grating pattern. The optical pickup further includes a control unit for applying a first voltage to the first area to control a refractive index of the first area and applying a second voltage to the second area to control a refractive index of the second area, thereby to control a diffraction characteristic of the integrated grating pattern.
摘要翻译：用于将光束照射到信息记录介质上并接收由介质反射的光的光学拾取器包括用于发射光束的光源和用于衍射光束以产生主光束的多个液晶面板和多个的子光束照射在介质上。液晶面板包括其中形成具有预定间距的第一组光栅图案的第一区域和形成具有预定间距的第二组光栅图案的第二区域，并且第一组光栅图案和第二组光栅图案光栅图案组布置在平面上，在第一区域和第二区域之间形成有间隙区域，以形成集成的光栅图案。光拾取器还包括控制单元，用于向第一区域施加第一电压以控制第一区域的折射率并向第二区域施加第二电压以控制第二区域的折射率，由此控制衍射集成光栅图案的特点。

2. 发明授权

US06801491B1 Focus error detecting apparatus of optical pickup with a light separating and astigmatism generation optical element and detection method thereof 失效
标题翻译：具有光分离和像散生成光学元件的光学拾取器的聚焦误差检测装置及其检测方法
公开(公告)号：US06801491B1
公开(公告)日：2004-10-05
申请号：US09511547
申请日：2000-02-23
申请人： Masakazu Ogasawara , Takuma Yanagisawa , Sakashi Ohtaki
发明人： Masakazu Ogasawara , Takuma Yanagisawa , Sakashi Ohtaki
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0909 , G11B7/0943 , G11B7/1381 , G11B2007/0006
摘要： A focus error detecting apparatus and a focus error detecting method of an optical pickup in which the system is not easily influenced by track transversal noises and an optical disc thickness error and which can be used together with a 3-beam system or a DPD system. The return light from an optical disc is divided to a first optical path and a second optical path by a hologram device, a predetermined astigmatism is applied to the light on each divided optical path, the light is received and detected by a first detector and a second detector, and a focusing error signal is obtained by predetermined arithmetic operations. The return light from the optical disc is divided to the first optical path P1 and the second optical path P2 by a lens device constructed by combining eccentric cylindrical lenses, a predetermined astigmatism is applied to the light on each divided optical path, the light is received and detected by a first detector and a second detector each having photosensing portions divided into four portions by dividing lines having a lightning shape, and a focusing error signal is obtained by predetermined arithmetic operations.
摘要翻译：光学拾取器的聚焦误差检测装置和聚焦误差检测方法，其中系统不容易受到轨道横向噪声和光盘厚度误差的影响，并且可以与三光束系统或DPD系统一起使用。来自光盘的返回光被全息装置分割为第一光路和第二光路，对每个划分的光路上的光施加预定的散光，由第一检测器和第二检测器接收和检测光第二检测器，并且通过预定的算术运算获得聚焦误差信号。通过将偏心柱面透镜组合而构成的透镜装置将来自光盘的返回光分成第一光路P1和第二光路P2，对每条划分的光路上的光施加预定的像散，接收光并且由具有闪电形状的划分线的具有被分成四部分的光敏部分的第一检测器和第二检测器检测，并且通过预定的算术运算获得聚焦误差信号。

3. 发明授权

US5999503A Focus control apparatus in multi-layered disk reading apparatus utilizing acceleration, deceleration and focus error signals to switch between layers of the disk 失效
标题翻译：多层盘读取装置中的聚焦控制装置，利用加速度，减速度和聚焦误差信号在盘的层之间切换
公开(公告)号：US5999503A
公开(公告)日：1999-12-07
申请号：US698797
申请日：1996-08-16
申请人： Kiyoshi Tateishi , Masakazu Ogasawara
发明人： Kiyoshi Tateishi , Masakazu Ogasawara
IPC分类号： G11B7/00 , G11B7/085 , G11B7/095
CPC分类号： G11B7/08511 , G11B2007/0013
摘要： Focus control apparatus in a reading apparatus for reading a multi-layered disk having information recorded on a plurality of recording surfaces thereof. The focus control apparatus includes a signal generating system for generating an acceleration signal for forcing the objective lens to move in the optical axis direction of the light beam and a deceleration signal for braking the objective lens which has been forced to move. The apparatus further includes control circuit for supplying a lens driving system with the acceleration signal and the deceleration signal as the driving signal in response to a switching instruction for switching a recording surface from which information is to be read, and for supplying the driving system with the focus error signal as the driving signal after the generation of the deceleration signal, to focus the light beam on a target recording surface. The deceleration signal has a parameter which is a function of distance between the recording surface which has been read before the switching instruction is issued and the target recording surface. Preferably, either of the acceleration signal and the deceleration signal is a signal which is compensated for the influence of gravity acting on the objective lens.
摘要翻译：用于读取具有记录在其多个记录表面上的信息的多层盘的读取装置中的聚焦控制装置。该聚焦控制装置包括：信号发生系统，用于产生用于迫使物镜在光束的光轴方向上移动的加速度信号;以及用于制动被迫移动的物镜的减速信号。该装置还包括控制电路，用于响应于用于切换要从其读取信息的记录表面的切换指令，向镜头驱动系统提供加速度信号和减速信号作为驱动信号，并且用于向驱动系统提供聚焦误差信号作为减速信号生成后的驱动信号，将光束聚焦在目标记录面上。减速信号具有作为在切换指令被读出的记录面与目标记录面之间的距离的函数的参数。优选地，加速度信号和减速信号中的任一个是补偿作用在物镜上的重力的影响的信号。

4. 发明授权

US6151154A Optical pickup, aberration correction unit and astigmatism measurement method 有权
标题翻译：光学拾取，像差校正单元和像散测量方法
公开(公告)号：US6151154A
公开(公告)日：2000-11-21
申请号：US265892
申请日：1999-03-11
申请人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
发明人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
IPC分类号： G02F1/1343 , G02F1/139 , G11B7/00 , G11B7/135 , G02F1/01
CPC分类号： G11B7/13925 , G02F1/134309 , G02F1/1393 , G11B7/1369 , G02F2203/18 , G11B2007/0006
摘要： An optical pickup includes: a light source, an object lens, and an aberration correction unit for correcting aberration by giving a phase difference to a light beam. The aberration correction unit corrects astigmatism caused by an optical system of the optical pickup.
摘要翻译：光学拾取器包括：光源，物镜，以及用于通过给光束赋予相位差来校正像差的像差校正单元。像差校正单元校正由光学拾取器的光学系统引起的像散。

5. 发明授权

US07944797B2 Recording and reproducing method, recording medium, and recording and reproducing apparatus 失效
标题翻译：记录和再现方法，记录介质和记录和再现装置
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。

6. 发明授权

US07821899B2 Optical pickup device 失效
标题翻译：光学拾取装置
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。

7. 发明申请

US20100177619A1 PICKUP DEVICE 失效
标题翻译：扒手装置
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。

8. 发明授权

US07643094B2 Color image processing apparatus, color image processing method, program and recording medium 失效
标题翻译：彩色图像处理装置，彩色图像处理方法，程序和记录介质
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。

9. 发明申请

US20090279406A1 HOLOGRAM RECORDING AND REPRODUCING SYSTEM 审中-公开
公开(公告)号：US20090279406A1
公开(公告)日：2009-11-12
申请号：US12065327
申请日：2006-08-09
申请人： Masakazu Ogasawara
发明人： Masakazu Ogasawara
IPC分类号： G11B7/00
CPC分类号： G11B7/0065 , G11B7/00781 , G11B7/128 , G11B7/1353 , G11B7/1369 , G11B7/1374 , G11B7/24044 , G11B2007/13727
摘要： A hologram recording and reproducing system for recording or reproducing information to or from a hologram record carrier that stores an optical interference pattern of a reference beam and a signal beam therein as a diffraction grating, includes: light producing means that generates a reference beam and a signal beam based on a coherent beam in which the coherent beam is modulated into the signal beam according to information to be recorded; interference means that allows one of the reference and signal beams to propagate axially on an optical axis as a central region light flux and allows the other of the reference and signal beams to propagate coaxially and annularly in section as an annular region light flux surrounding the one spatially separated from the other in a same direction and converges both the reference beam and the signal beam on different focal points in the optical axis respectively through an objective lens optical system to cause interference between the reference beam and the signal beam; a hologram record carrier having a hologram record layer located on a side of a near one of the different focal points to the objective lens optical system and a reflection layer located on a side of a distant one of the different focal points from the objective lens optical system; and 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; wherein the hologram record carrier further comprising a servo guide layer which is placed at a position either nearer to the objective lens optical system than the hologram record layer or farther than the reflection layer from the objective lens optical system. The hologram recording and reproducing system further includes a servo control system for focusing a servo beam onto the servo guide layer and for receiving a reflection light returning from the servo guide layer to photoelectrically convert it to a signal and for driving the objective lens optical system in accordance with the signal photoelectrically converted, wherein the servo beam has a wavelength different from the coherent beam wavelength and passes through the central region coaxially with the central region light flux including the optical axis.

10. 发明授权

US07499386B2 Aberration correction apparatus, and control apparatus, control method and control program of optical pickup 失效
标题翻译：畸变校正装置，光学拾取器的控制装置，控制方法和控制程序
公开(公告)号：US07499386B2
公开(公告)日：2009-03-03
申请号：US11177638
申请日：2005-07-11
申请人： Masakazu Ogasawara
发明人： Masakazu Ogasawara
IPC分类号： G11B7/00
CPC分类号： G11B7/1369 , G11B7/0956 , G11B7/13927 , G11B2007/0006
摘要： An aberration correction apparatus includes an optical pickup having a liquid crystal panel which gives a phase difference to a light beam emitted from a light source unit and irradiated onto a recording medium and corrects an aberration occurring to the light beam by a tilt of the recording medium, and a control unit which applies, to the liquid crystal panel, a correction voltage correspondent to an amount of the aberration in reference to a bias voltage. The bias voltage is set for each of the recording mediums so that the correction voltage applied for correcting the aberration of the same amount caused by the disc tilt becomes equal for different kinds of recording mediums. Namely, even when the plural kinds of recording mediums are used, if the disc tilt angles are same, the aberration can be corrected by applying the same correction voltage. Therefore, by using a control circuit for applying the correction voltage, the control can be executed with the same resolution irrespective of the kind of recording medium, and aberration correction accuracy of each recording medium can be improved.
摘要翻译：像差校正装置包括具有液晶面板的光学拾取器，该液晶面板对从光源单元发射的光束照射到记录介质上，并且通过记录介质的倾斜来校正发生在光束上的像差，以及控制单元，其向液晶面板施加与偏置电压相关的像差量的校正电压。为每个记录介质设置偏置电压，使得用于校正由盘倾斜引起的相同量的像差的校正电压在不同种类的记录介质上相等。也就是说，即使使用多种记录介质，如果盘倾斜角度相同，则可以通过施加相同的校正电压来校正像差。因此，通过使用用于施加校正电压的控制电路，可以以相同的分辨率执行控制，而与记录介质的种类无关，并且可以提高每个记录介质的像差校正精度。

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