公开(公告)号：US20090109816A1

公开(公告)日：2009-04-30

申请号：US12256365

申请日：2008-10-22

申请人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

发明人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/1267

摘要： According to one embodiment, a calibration section controls an LD driving section so as to carry out test writing on a recording layer of an optical disc using a light pulse having relaxation oscillation, irradiates the test-written area with a reproduction laser beam so as to detect reflected light, and determine write strategy based on the detected result. A recording process is executed on the optical disc by using the light pulse having relaxation oscillation based on the write strategy determined by the calibration section.

摘要翻译： 根据一个实施例，校准部分控制LD驱动部分，以便使用具有弛豫振荡的光脉冲对光盘的记录层进行测试写入，用再现激光束照射测试写入区域，以便 检测反射光，并根据检测结果确定写入策略。 通过使用基于由校准部确定的写入策略的具有弛豫振荡的光脉冲在光盘上执行记录处理。

公开(公告)号：US08077586B2

公开(公告)日：2011-12-13

申请号：US12257213

申请日：2008-10-23

申请人： Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

发明人： Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/127 ,  G11B7/0045 ,  G11B7/006

摘要： According to one embodiment, an optical recording head device includes a light source which outputs such a relaxation oscillation optical pulse that a full width at half maximum of a single pulse is 820 ps or less, a driving unit for driving the light source, an objective lens which converges emission light from the light source on a recording layer of a recording medium, and captures reflective light which is reflected by the recording layer of the recording medium, a distribution unit, placed between the light source and the objective lens, for distributing incident light, and a photodetection unit for receiving via the distribution unit the reflective light which is reflected by the recording layer of the recording medium, wherein a resonator length of the light source is 6560 μm or less.

摘要翻译： 根据一个实施例，光记录头装置包括一个光源，其输出这样的弛豫振荡光脉冲，单脉冲的半高全宽为820ps或更小，用于驱动光源的驱动单元， 将来自光源的发射光会聚在记录介质的记录层上并捕获由记录介质的记录层反射的反射光，放置在光源和物镜之间的分配单元，用于分布 以及光检测单元，用于经由分配单元接收由记录介质的记录层反射的反射光，其中光源的谐振器长度为6560μm以下。

公开(公告)号：US20090109815A1

公开(公告)日：2009-04-30

申请号：US12260920

申请日：2008-10-29

申请人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

发明人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/1267

摘要： According to one embodiment, an optical disc device includes a light source portion which applies laser light to an optical disc, a drive portion which supplies a drive current to the light source portion so as to cause the light source portion to apply laser light of light pulses having relaxation oscillation, and a controller which controls the drive portion to supply a drive current so as to cause the light source portion to emit laser light of (n−1)×N (N is an integral number) light pulses having relaxation oscillation with respect to a mark with recording mark length nT (n: integral number, T: channel clock) to be recorded on the optical disc.

摘要翻译： 根据一个实施例，光盘装置包括向光盘施加激光的光源部分，向光源部分提供驱动电流以使光源部分施加光的激光的驱动部分 具有弛豫振荡的脉冲和控制驱动部分提供驱动电流以使光源部分发出具有弛豫振荡的（n-1）×N（N为整数）光脉冲的激光的控制器， 相对于要记录在光盘上的具有记录标记长度nT（n：整数，T：通道时钟）的标记。

公开(公告)号：US20090196138A1

公开(公告)日：2009-08-06

申请号：US12351226

申请日：2009-01-09

申请人： Nobuaki Kaji ,  Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Masahiro Saito

发明人： Nobuaki Kaji ,  Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/126

摘要： According to one embodiment, in one embodiment of the invention, a laser drive circuit is provided with a first current source, a second drive current source, and a third current source. The control section selectively obtains a plurality of laser light use mode of controlling the from first to third current sources to use pulse laser light accompanying relaxation oscillation, and a complex laser light use mode of using laser light where laser pulses are combined, whose starting end has an abrupt impulse change portion caused by relaxation oscillation and whose intermediate section is a flat portion with a fixed intensity.

摘要翻译： 根据一个实施例，在本发明的一个实施例中，激光驱动电路设置有第一电流源，第二驱动电流源和第三电流源。 控制部选择性地获得多个激光使用模式，其控制从第一至第三电流源使用伴随弛豫振荡的脉冲激光，以及复合激光使用模式，其中使用激光脉冲组合的激光，其起始端 具有由松弛振动引起的突然脉冲变化部分，其中间部分是具有固定强度的平坦部分。

公开(公告)号：US20090141760A1

公开(公告)日：2009-06-04

申请号：US12260824

申请日：2008-10-29

申请人： Masahiro Saito ,  Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Kazuto Kuroda

发明人： Masahiro Saito ,  Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Kazuto Kuroda

IPC分类号： H01S3/00

CPC分类号： G11B7/1263

摘要： According to one embodiment, a drive control apparatus of a semiconductor laser includes a driving circuit which drives the semiconductor laser by applying pulses transiting from bias current to peak current to the semiconductor laser as laser driving current that causes relaxation oscillation of emission light intensity of the semiconductor laser, and a control circuit which controls the bias current such that the bias current has a predetermined ratio limiting fluctuation of a leading peak value of the relaxation oscillation occurring for each application of pulses relative to threshold current of the semiconductor laser. The control circuit changes the bias current to maintain the predetermined ratio relative to fluctuation of the threshold current.

摘要翻译： 根据一个实施例，半导体激光器的驱动控制装置包括驱动电路，该驱动电路通过施加从偏置电流流向峰值电流的脉冲来驱动半导体激光器作为激光驱动电流，该激光驱动电流引起半导体激光器的发射光强度的弛豫振荡 半导体激光器和控制偏置电流的控制电路，使得偏置电流相对于半导体激光器的阈值电流具有针对每次施加脉冲而产生的弛豫振荡的引导峰值的预定比例限制波动。 控制电路改变偏置电流以相对于阈值电流的波动保持预定的比率。

公开(公告)号：US20090109809A1

公开(公告)日：2009-04-30

申请号：US12258359

申请日：2008-10-24

申请人： Kazuto Kuroda ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Takashi Usui ,  Masahiro Saito

发明人： Kazuto Kuroda ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Takashi Usui ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/00456

摘要： According to one embodiment, a laser drive circuit includes a photodetector which receives part of laser light emitted from a laser element to a recording medium independently of reflection laser light reflected by the recording medium, and outputs an output corresponding to the strength thereof, an integration circuit which integrates the output from the photodetector for a predetermined time, and a setting circuit which sets the intensity of a laser drive current supplied to the laser element on the basis of the output from the integration circuit.

摘要翻译： 根据一个实施例，激光驱动电路包括光电检测器，其独立于由记录介质反射的反射激光，将从激光元件发射的激光的一部分接收到记录介质，并且输出与其强度对应的输出， 电路，其将来自光电检测器的输出积分预定时间;以及设置电路，其根据积分电路的输出设定提供给激光元件的激光驱动电流的强度。

公开(公告)号：US20090109808A1

公开(公告)日：2009-04-30

申请号：US12208658

申请日：2008-09-11

申请人： Nobuaki Kaji ,  Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yasu ,  Chosaku Noda ,  Kazuto Kuroda ,  Masahiro Saito

发明人： Nobuaki Kaji ,  Kazuo Watabe ,  Takashi Usui ,  Keiichiro Yasu ,  Chosaku Noda ,  Kazuto Kuroda ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  H01S5/0428

摘要： According to one embodiment, a laser drive circuit which supplies a drive current to a laser element which outputs light at a predetermined wavelength, and a laser control circuit which supplies a predetermined timing pulse for generation of relaxation oscillation in a laser drive current supplied to the laser drive circuit, the laser control circuit supplying a laser drive current higher than a threshold value which is supplied from the laser drive circuit to the laser element to enable laser light to be output from the laser element, the laser control circuit setting the laser drive current to a level lower than the threshold value on the basis of the timing pulse.

摘要翻译： 根据一个实施例，提供驱动电流到激光元件的激光驱动电路，激光元件输出预定波长的光;以及激光控制电路，其提供预定的定时脉冲，以产生提供给 激光驱动电路，激光控制电路提供高于从激光驱动电路提供给激光元件的阈值的激光驱动电流，以使激光能够从激光元件输出，激光控制电路设置激光驱动 基于定时脉冲将电流电流降至低于阈值的电平。

公开(公告)号：US08593926B2

公开(公告)日：2013-11-26

申请号：US13353474

申请日：2012-01-19

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

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

IPC分类号： G11B7/00

CPC分类号： G11B7/083 ,  G03H1/2286 ,  G03H2222/34 ,  G11B7/0065 ,  G11B7/09 ,  G11B7/1381 ,  G11B2007/0009

摘要： An information storage device includes an information recording medium, at least a single light source that emits laser light, an illuminating unit that illuminates substantially the same position of the information recording medium with two light rays generated from the laser light, in different directions, a light detecting unit that detects reflection light of the two light rays reflected from the information recording medium and outputs a detection signal, an operation unit that calculates position error information of the information recording medium based on the detection signal; and, a driving device that changes the position of the information recording medium based on the position error information.

摘要翻译： 信息存储装置包括：信息记录介质，至少一个发射激光的光源;照明单元，其以不同方向从激光产生的两束光照射基本相同位置的信息记录介质; 光检测单元，其检测从信息记录介质反射的两个光线的反射光并输出检测信号;运算单元，其基于检测信号计算信息记录介质的位置误差信息; 以及基于位置误差信息改变信息记录介质的位置的驱动装置。

公开(公告)号：US20120140606A1

公开(公告)日：2012-06-07

申请号：US13353474

申请日：2012-01-19

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

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

IPC分类号： G11B7/0065

CPC分类号： G11B7/083 ,  G03H1/2286 ,  G03H2222/34 ,  G11B7/0065 ,  G11B7/09 ,  G11B7/1381 ,  G11B2007/0009

摘要： An information storage device includes an information recording medium, at least a single light source that emits laser light, an illuminating unit that illuminates substantially the same position of the information recording medium with two light rays generated from the laser light, in different directions, a light detecting unit that detects reflection light of the two light rays reflected from the information recording medium and outputs a detection signal, an operation unit that calculates position error information of the information recording medium based on the detection signal; and, a driving device that changes the position of the information recording medium based on the position error information.

摘要翻译： 信息存储装置包括：信息记录介质，至少一个发射激光的光源;照明单元，其以不同方向从激光产生的两束光照射基本相同位置的信息记录介质; 光检测单元，其检测从信息记录介质反射的两个光线的反射光并输出检测信号;运算单元，其基于检测信号计算信息记录介质的位置误差信息; 以及基于位置误差信息改变信息记录介质的位置的驱动装置。

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。