公开(公告)号：US20100231234A1

公开(公告)日：2010-09-16

申请号：US12738222

申请日：2007-10-18

申请人： Kiyoshi Tateishi ,  Tomotaka Yabe

发明人： Kiyoshi Tateishi ,  Tomotaka Yabe

IPC分类号： G01R27/04

CPC分类号： G11B9/02 ,  G11B9/06 ,  G11B11/08

摘要： A device for detecting polarization direction of a ferroelectric is provided. From a measurement signal provided through a probe disposed in contact with or near the surface of a ferroelectric, a demodulation means generates a detection signal having a signal level corresponding to a capacitance change of the ferroelectric due to application of an alternating electric field to a capacitor component formed in the ferroelectric directly below the probe. A synchronous detection means performs synchronous detection of the detection signal based on a synchronous signal and generates a polarization direction detection signal corresponding to the polarization direction of the ferroelectric. A pseudo-noise signal generation means generates a pseudo-noise signal with the same frequency as that of the electric field signal and a different phase and amplitude therefrom. The demodulation means includes a noise component removal means that removes noise components in the measurement signal through signal arithmetic processing with the pseudo-noise signal.

摘要翻译： 提供一种用于检测铁电体的极化方向的装置。 从通过与铁电体的表面接触或接近设置的探针提供的测量信号，解调装置产生具有对应于铁电体的电容变化的信号电平的检测信号，这是由于向电容器施加交变电场 在探针下方的铁电体中形成的部件。 同步检测装置基于同步信号执行检测信号的同步检测，并产生与铁电体的偏振方向对应的偏振方向检测信号。 伪噪声信号产生装置产生具有与电场信号相同频率的伪噪声信号，并且产生与其不同的相位和幅度。 解调装置包括噪声分量去除装置，其通过具有伪噪声信号的信号运算处理来去除测量信号中的噪声分量。

公开(公告)号：US07672209B2

公开(公告)日：2010-03-02

申请号：US11631318

申请日：2005-07-07

申请人： Kiyoshi Tateishi ,  Michikazu Hashimoto

发明人： Kiyoshi Tateishi ,  Michikazu Hashimoto

IPC分类号： G11B11/00 ,  G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/00781

摘要： An example hologram recording/reproduction device reproduces recorded information from a holographic recording medium where interference fringes formed by a reference light and an object light corresponding to the recording information are recorded. The example hologram recording/reproduction device irradiates the reference light to a holographic recording medium; generates detection information data (Ddet) according to the detection light generated by irradiation of the reference light; sets a target irradiation position of the reference light on the surface of the holographic recording medium according to the detection information data; and moves the irradiation means with respect to the holographic recording medium along its surface so that the reference light is irradiated to the target irradiation position.

摘要翻译： 示例性全息图记录/再现装置从全息记录介质再现记录的信息，其中记录了由参考光形成的干涉条纹和与记录信息相对应的物体光。 示例性全息图记录/再现装置将参考光照射到全息记录介质; 根据由参考光的照射产生的检测光产生检测信息数据（Ddet）; 根据检测信息数据，将参考光的目标照射位置设置在全息记录介质的表面上; 并且沿其表面相对于全息记录介质移动照射装置，使得参考光照射到目标照射位置。

公开(公告)号：US20100008201A1

公开(公告)日：2010-01-14

申请号：US12513966

申请日：2007-03-20

申请人： Michikazu Hashimoto ,  Kiyoshi Tateishi

发明人： Michikazu Hashimoto ,  Kiyoshi Tateishi

IPC分类号： G11B20/10

CPC分类号： H03M13/4107 ,  G06K7/14 ,  G06K7/1417 ,  G11B7/0065 ,  G11B7/00781 ,  H03M13/41

摘要： A demodulation method comprises the steps of performing branch metric computation on each of columns of a modulation symbol; calculating column path metrics that are respective path metrics of column state values of modulation symbols; and calculating symbol path metrics that are respective path metrics of symbol state values of the modulation symbols.

摘要翻译： 解调方法包括以下步骤：对调制符号的每一列执行分支度量计算; 计算作为调制符号的列状态值的相应路径度量的列路径度量; 以及计算作为调制符号的符号状态值的相应路径度量的符号路径量度。

公开(公告)号：US07522482B2

公开(公告)日：2009-04-21

申请号：US10921836

申请日：2004-08-20

申请人： Kiyoshi Tateishi ,  Kazuo Takahashi ,  Mitsuru Sato ,  Ichiro Sugai

发明人： Kiyoshi Tateishi ,  Kazuo Takahashi ,  Mitsuru Sato ,  Ichiro Sugai

IPC分类号： G11B7/00

CPC分类号： G11B7/08511 ,  G11B7/0945 ,  G11B2007/0013

摘要： An optical pickup is provided for preventing an objective lens from colliding with an optical recording medium at the stage of initial adjustments. The optical pickup device comprises a servo circuit, and a lens driver for driving an objective lens. In the servo circuit, a drive signal generator supplies the lens driver with one of a first focus drive signal for moving the objective lens in a direction closer to an information recording layer, and a second focus drive signal for moving the objective lens in a direction away from the information recording layer. A controller in a timing generator switches a signal supplied to the lens driver from the first focus drive signal to the second focus drive signal when the level changes by a predetermined range or more in a servo signal which is generated during a period in which the first focus drive signal is being supplied to the lens driver.

摘要翻译： 提供了一种用于在初始调整阶段防止物镜与光记录介质碰撞的光拾取器。 光学拾取装置包括伺服电路和用于驱动物镜的透镜驱动器。 在伺服电路中，驱动信号发生器向透镜驱动器提供用于使物镜沿更靠近信息记录层的方向移动的第一聚焦驱动信号和用于使物镜沿方向移动的第二聚焦驱动信号 远离信息记录层。 定时发生器中的控制器在第一聚焦驱动信号中提供给镜头驱动器的信号切换到第二聚焦驱动信号，当电平在伺服信号中改变预定范围或更大时，该伺服信号是在第一 聚焦驱动信号被提供给镜头驱动器。

公开(公告)号：US07109462B2

公开(公告)日：2006-09-19

申请号：US10753533

申请日：2004-01-09

申请人： Kiyoshi Tateishi ,  Junichi Furukawa

发明人： Kiyoshi Tateishi ,  Junichi Furukawa

IPC分类号： G01J1/32 ,  G02B7/043 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0045

摘要： An optical pickup apparatus comprises a semiconductor laser output controller for emitting laser beam, a photodetector for detecting the emitted laser beam, a sampling processor for performing a sampling process, an averaging processor for performing an averaging process, a pulse current generator for generating erase current pulses, write current pulses, and read current pulses, and a controller 200 for controlling the above components. The apparatus adds averaged values and sampled values and controls the semiconductor laser output controller based on the result of the addition and on the current pulses.

摘要翻译： 光拾取装置包括用于发射激光束的半导体激光输出控制器，用于检测发射的激光束的光电检测器，用于执行采样处理的采样处理器，用于执行平均处理的平均处理器，用于产生擦除电流的脉冲电流发生器 脉冲，写入电流脉冲和读取电流脉冲，以及用于控制上述组件的控制器200。 该装置加上平均值和采样值，并根据加法结果和当前脉冲控制半导体激光输出控制器。

公开(公告)号：US20060077852A1

公开(公告)日：2006-04-13

申请号：US11075764

申请日：2005-03-10

申请人： Kiyoshi Tateishi ,  Michikazu Hashimoto

发明人： Kiyoshi Tateishi ,  Michikazu Hashimoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/0065

摘要： A hologram reproduction apparatus includes a light-receiving unit such as a two-dimensional sensor which obtains two-dimensionally modulated image data, and an A/D converter which A/D-converts analog data obtained by the light-receiving unit into digital data. In addition, the hologram reproduction apparatus detects a number of pixels having a digital value larger than a first defined value in the A/D-converted image data for one page, by a first pixel number detecting unit. The hologram reproduction apparatus controls a magnitude value of the image data at the time of the A/D conversion by the first control unit so that the number of detected pixels is within a predetermined range. Thereby, a dynamic range of the A/D conversion to the two-dimensional modulated image data can effectively be used. Therefore, a quantization noise due to the A/D conversion can be reduced, and also a reproduction S/N can be improved.

摘要翻译： 一种全息图再现装置包括：获得二维调制图像数据的诸如二维传感器的光接收单元和将由光接收单元获得的模拟数据A / D转换成数字数据的A / D转换器 。 此外，全息图再现装置通过第一像素数检测单元检测在一页的A / D转换图像数据中具有大于第一定义值的数字值的像素数量。 全息图再现装置控制由第一控制单元进行A / D转换时的图像数据的幅度值，使得检测像素的数量在预定范围内。 由此，可以有效地使用A / D转换到二维调制图像数据的动态范围。 因此，可以减少由于A / D转换引起的量化噪声，并且还可以提高再现S / N。

公开(公告)号：US06888782B2

公开(公告)日：2005-05-03

申请号：US09836237

申请日：2001-04-18

申请人： Kiyoshi Tateishi ,  Masaki Kobayashi

发明人： Kiyoshi Tateishi ,  Masaki Kobayashi

IPC分类号： G11B7/004 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/0948

摘要： A servo control apparatus of an optical pickup includes an extractor for extracting an error signal from a read signal; an equalizer including a phase compensator for equalizing the error signal to generate a drive signal; a driver for changing the servo position of the optical pickup in response to the drive signal; a dropout detector for extracting an envelope signal from the read signal to detect a dropout of the read signal; and a controller. The controller changes an equalization characteristics of the equalizer in accordance with an amplitude of the envelope signal during the period of time when the dropout occurs or in response to an occurrence of the dropout.

摘要翻译： 光拾取器的伺服控制装置包括一个提取器，用于从读信号中提取误差信号; 均衡器，包括用于均衡误差信号以产生驱动信号的相位补偿器; 用于响应于驱动信号改变光学拾取器的伺服位置的驱动器; 用于从读取信号中提取包络信号以检测读取信号的丢失的压差检测器; 和控制器。 控制器根据在出现发生的时间段期间的包络信号的幅度或响应于出现丢失而改变均衡器的均衡特性。

公开(公告)号：US20050078951A1

公开(公告)日：2005-04-14

申请号：US10948285

申请日：2004-09-24

申请人： Junichi Furukawa ,  Kiyoshi Tateishi

发明人： Junichi Furukawa ,  Kiyoshi Tateishi

IPC分类号： G11B7/125 ,  G11B7/126 ,  H01S5/0687 ,  H04N5/50

CPC分类号： H01S5/0687 ,  G11B7/126

摘要： A driving device includes a superimposing unit, a reference clock signal generating unit and a control unit. The superimposing unit superimposes a superimposed signal on a driving signal that drives an optical beam radiating unit for radiating an optical beam, and outputs the driving signal, on which the superimposed signal is imposed, to the optical beam radiating unit. The reference clock signal generating unit generates a reference clock signal. The control unit keeps a frequency of the superimposed signal constant on a basis of a feedback system utilizing the reference clock signal thus generated.

摘要翻译： 驱动装置包括叠加单元，参考时钟信号发生单元和控制单元。 叠加单元将叠加的信号叠加在驱动用于照射光束的光束照射单元的驱动信号上，并将施加有叠加信号的驱动信号输出到光束照射单元。 基准时钟信号生成部生成基准时钟信号。 控制单元在利用由此产生的基准时钟信号的反馈系统的基础上保持叠加信号的频率恒定。

公开(公告)号：US06791916B2

公开(公告)日：2004-09-14

申请号：US09879249

申请日：2001-06-12

申请人： Kiyoshi Tateishi ,  Kazuo Takahashi

发明人： Kiyoshi Tateishi ,  Kazuo Takahashi

IPC分类号： G11B700

CPC分类号： G11B7/0948 ,  G11B20/18

摘要： A servo control apparatus is provided to a stable servo control even when delays occur in detecting defects. Based on reflected light of an optical beam from an optical disc, a defect resulting from dark spots, damages, or others on the optical disc is detected. Immediately before the detection, sample data of a control signal are memorized. The sample data are obtained during a predetermined interval of time that corresponds to a detection delay for the defects, which is dependent on a defect detecting device. Using the memorized sample data, a cancel signal is produced for canceling the influence of the control signal, which is owing to a pseudo error signal obtained during the predetermined interval of time. The cancel signal is outputted as the control signal immediately after the detection of the defect.

摘要翻译： 即使在检测到缺陷时发生延迟，也将伺服控制装置提供给稳定的伺服控制。 基于来自光盘的光束的反射光，检测到由于光斑上的暗点，损伤或其他的缺陷。 在检测之前，存储控制信号的采样数据。 在与缺陷检测装置相关的缺陷的检测延迟对应的预定时间间隔内获得采样数据。 使用存储的采样数据，产生用于消除由于在预定时间间隔期间获得的伪误差信号而导致的控制信号的影响的消除信号。 在检测到缺陷之后立即输出取消信号作为控制信号。

公开(公告)号：US06603716B1

公开(公告)日：2003-08-05

申请号：US09534132

申请日：2000-03-23

申请人： Kiyoshi Tateishi ,  Mitsuru Sato

发明人： Kiyoshi Tateishi ,  Mitsuru Sato

IPC分类号： G11B700

CPC分类号： G11B7/0901 ,  G11B7/0956

摘要： In an optical pickup direction detection unit, a detector group receives return light from an optical disc and outputs a light detection electric signal, a push-pull signal generator generates a push-pull signal, and a land prepit signal generator generates a land prepit signal. Further, a direction determiner detects a direction detection signal based on a tracking error signal and the land prepit signal.

摘要翻译： 在光拾取方向检测单元中，检测器组接收来自光盘的返回光，并输出光检测电信号，推挽信号发生器产生推挽信号，并且焊盘预制信号发生器产生焊盘预制信号 。 此外，方向确定器基于跟踪误差信号和平面预置信号来检测方向检测信号。