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41. 发明授权

US07099255B2 Error counting apparatus for counting an error number of a pre-pit signal in an optical disc and method therefor 有权
标题翻译：用于对光盘中的预凹陷信号的错误数进行计数的误差计数装置及其方法
公开(公告)号：US07099255B2
公开(公告)日：2006-08-29
申请号：US10139394
申请日：2002-05-07
申请人： Masahiro Kato , Naoharu Yanagawa , Tatsuhiro Yone , Yuko Muramatsu , Shinji Suzuki
发明人： Masahiro Kato , Naoharu Yanagawa , Tatsuhiro Yone , Yuko Muramatsu , Shinji Suzuki
IPC分类号： G11B7/00
CPC分类号： G11B27/34 , G11B7/00375 , G11B20/1803 , G11B27/36 , G11B2220/216 , G11B2220/2562
摘要： In an error counting apparatus and method, there are provided a reproducing section for reproducing the optical disc and a counter for counting the error number of the pre-pit signal based on an output of the reproducing section. When it is detected that the reproducing section come up to the reproduction of the emboss portion, a counting operation of the counter is started in response to this detection. When it is detected that the reproducing section has reproduced the optical disc in the predetermined interval after the counting operation is started, the counting operation of the counter is stopped in response to this detection.
摘要翻译：在误差计数装置和方法中，提供了一种用于再现光盘的再现部分和用于根据再现部分的输出对预制凹坑信号的误差数进行计数的计数器。当检测到再现部分达到压花部分的再现时，响应于该检测开始计数器的计数操作。当检测到再现部分在计数操作开始之后以预定间隔再现光盘时，响应于该检测停止计数器的计数操作。

42. 发明授权

US06975574B2 Device and method for controlling tilt servo 失效
公开(公告)号：US06975574B2
公开(公告)日：2005-12-13
申请号：US09994608
申请日：2001-11-28
申请人： Naoharu Yanagawa , Masahiro Kato
发明人： Naoharu Yanagawa , Masahiro Kato
IPC分类号： G11B7/004 , G11B7/00 , G11B7/09 , G11B7/095 , G11B7/135
CPC分类号： G11B7/0956 , G11B7/0945 , G11B7/1369 , G11B2007/0006
摘要： A tilt servo control device of an apparatus for recording information on and reproducing information from an optical recording medium set in the apparatus, the apparatus comprising an optical system for leading a laser beam emitted from a light source to a recording surface of the optical recording medium and a laser beam reflected by the recording surface of the recording medium to a photo detector and a read signal generator for generating a read signal in accordance with an output signal of the photo detector. The tilt servo control device determines a type of the optical recording medium, generates a tilt drive signal so as to reduce a tilt angle at a position of the laser beam irradiating the recording surface and an optical axis of the laser beam by a method for generating a tilt drive signal corresponding to the recording medium type, and drives a tilt angle adjuster for adjusting the tilt angle in accordance with the tilt drive signal.

43. 发明授权

US06928041B2 Pre-pit detecting apparatus for optical recording medium 失效
标题翻译：光记录媒体预坑检测装置
公开(公告)号：US06928041B2
公开(公告)日：2005-08-09
申请号：US10062556
申请日：2002-02-05
申请人： Masahiro Kato , Naoharu Yanagawa , Tatsuhiro Yone , Yuko Muramatsu , Shinji Suzuki
发明人： Masahiro Kato , Naoharu Yanagawa , Tatsuhiro Yone , Yuko Muramatsu , Shinji Suzuki
IPC分类号： G11B7/005 , G11B7/007 , G11B19/12
CPC分类号： G11B19/12 , G11B7/005 , G11B7/00745
摘要： A pre-pit detecting apparatus which, when a light beam is radiated onto an optical recording medium having a recording surface with pre-pits repeatedly formed between tracks, receives light reflected by the recording surface with first and second light receiving faces, obtains the push-pull signal corresponding to the light receiving signals for the first and second light receiving faces, and binarizes the push-pull signal by using a threshold value to generate a pre-pit detection signal. It is judged which area of a plurality of areas including at least a not-yet-recorded area corresponds to a position of the recording surface where the light beam is radiated is performed to judge. Then the threshold value is set in accordance with the judgement result.
摘要翻译：一种预凹坑检测装置，当将光束照射到具有在轨迹之间重复形成的预凹坑的记录表面的光记录介质上时，接收由第一和第二光接收面由记录表面反射的光，获得推 - 对应于第一和第二光接收面的光接收信号的Pull信号，并且通过使用阈值来二值化推挽信号以产生预凹坑检测信号。判断包括至少未记录区域的多个区域的哪个区域对应于执行光束的记录表面的位置来判断。然后根据判断结果设定阈值。

44. 发明授权

US06925039B2 Device and method for controlling tilt servo 失效
标题翻译：用于控制倾斜伺服的装置和方法
公开(公告)号：US06925039B2
公开(公告)日：2005-08-02
申请号：US09994607
申请日：2001-11-28
申请人： Naoharu Yanagawa , Masahiro Kato
发明人： Naoharu Yanagawa , Masahiro Kato
IPC分类号： G11B7/004 , G11B7/00 , G11B7/0045 , G11B7/095 , G11B7/125 , G11B7/13 , G11B7/135
CPC分类号： G11B7/131 , G11B7/0045 , G11B7/0956 , G11B7/126 , G11B7/1267 , G11B7/1369 , G11B2007/0006
摘要： A tilt servo control device of an apparatus for recording information on and reproducing information from an optical recording medium, the apparatus comprising an optical system for leading a laser beam emitted from a light source to a recording surface of the optical recording medium and a laser beam reflected by the recording surface of the recording medium to a split type photo detector and a read signal generator for generating a read signal in accordance with an output signal of the photo detector. The tilt servo control device generates a push-pull component signal including a differential component of output signals of respective split portions of the photo detector, generates a tilt error signal representing a tilt angle at a position of the laser beam irradiating the recording surface and an optical axis of the laser beam based on the push-pull component signal, and drives a tilt angle adjuster for adjusting the tilt angle so as to reduce the tilt error signal.
摘要翻译：一种用于在光学记录介质上记录信息并从光学记录介质再现信息的设备的倾斜伺服控制装置，该装置包括用于将从光源发射的激光束引导到光学记录介质的记录表面的光学系统，以及激光束由记录介质的记录表面反射到分离式光电检测器和用于根据光电检测器的输出信号产生读取信号的读取信号发生器。倾斜伺服控制装置产生包括光电检测器的各个分割部分的输出信号的差分分量的推挽分量信号，产生表示在照射记录表面的激光束的位置处的倾斜角度的倾斜误差信号，基于推挽分量信号的激光束的光轴，并且驱动用于调整倾斜角的倾斜角度调节器，以便减少倾斜误差信号。

45. 发明授权

US06567354B2 Optical pickup device minimizing an undesirable astigmatism 有权
公开(公告)号：US06567354B2
公开(公告)日：2003-05-20
申请号：US10038543
申请日：2002-01-03
申请人： Naoharu Yanagawa
发明人： Naoharu Yanagawa
IPC分类号： G11B700
CPC分类号： G11B7/0956 , G11B7/0909
摘要： An optical pickup device comprises an objective lens unit having an objective lens, a support member for supporting the objective lens and an objective-lens driving mechanism for driving the objective lens in a radial direction and a focusing direction of an optical disc in such a way that a light beam is focused on an information recording surface of the optical disc; and a main unit having an optical irradiation system which includes a light source for emitting a light beam and guides the light beam to the objective lens, and an optical detection system which includes a photo-sensor and guides reflected light from the information recording surface to the photo-sensor via the objective lens. The optical pickup apparatus further has a tilt-position-adjusting mechanism for supporting the objective lens unit on the main unit and tilting an optical axis of the objective lens with respect to an optical axis of the optical irradiation system in such a way as to minimize an undesirable astigmatism given by the optical disc and optical elements in the optical irradiation system and the optical detection system.

46. 发明授权

US5483512A Optical information recording/reproducing device 失效
标题翻译：光信息记录/再现装置
公开(公告)号：US5483512A
公开(公告)日：1996-01-09
申请号：US223212
申请日：1994-04-05
申请人： Naoharu Yanagawa
发明人： Naoharu Yanagawa
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/095 , G11B7/125
CPC分类号： G11B7/126 , G11B7/0956
摘要： A device for recording information on a recordable optical disk includes: an optical pickup provided with laser unit for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; radial tilt correcting mechanism for moving the pickup on the basis of the radial tilt quantity to correct the radial tilt; and tangential tilt correcting unit for controlling the power of the laser beam on the basis of the tangential tilt quantity.
摘要翻译：一种用于在可记录光盘上记录信息的装置包括：光学拾取器，其设置有用于发射激光束并将其照射到光盘上的激光单元; 径向倾斜检测单元，用于检测光盘在其径向方向上的倾斜量; 切向倾斜检测单元，用于检测光盘在其切线方向上的倾斜量; 径向倾斜校正机构，用于基于径向倾斜量移动拾取器以校正径向倾斜; 以及切向倾斜校正单元，用于基于切向倾斜量来控制激光束的功率。

47. 发明授权

US5084850A Apparatus for detecting focus error signal 失效
标题翻译：检测焦点错误信号的装置
公开(公告)号：US5084850A
公开(公告)日：1992-01-28
申请号：US487077
申请日：1990-03-01
申请人： Naoharu Yanagawa , Katsuharu Satoh
发明人： Naoharu Yanagawa , Katsuharu Satoh
IPC分类号： G11B11/10 , G11B7/09 , G11B7/095 , G11B7/13 , G11B7/135 , G11B11/105
CPC分类号： G11B7/0909 , G11B11/10543 , G11B7/13 , G11B7/1365 , G11B7/1378 , G11B7/1381
摘要： An apparatus for detecting a focus error signal in which reflected laser light is split into two optical paths by a polarized light beam splitter while astigmatisms are produced in the laser light by at least one astigmatism generating element, and the two split beams are led so as to be incident upon two quadrant photodetectors, respectively. A focus error signal is obtained as an electrical signal by subtracting the sum of the quantities of light received by one of the diagonal pairs of regions among the quadrant regions of the two photodetectors from the sum of the quantities of light received by the other diagonal pair. An offset component in a focus error signal is removed by, for example, a variable resistor. This arrangement enables cancelling of influence of double refraction in a magnetooptic disk or the like, thereby making the optical head free of the problem of such influence.

48. 发明授权

US07859965B2 Recording device and method, reproducing device and method, recording/reproducing device and method, and computer program 失效
标题翻译：记录装置和方法，再现装置和方法，记录/再现装置和方法以及计算机程序
公开(公告)号：US07859965B2
公开(公告)日：2010-12-28
申请号：US11918052
申请日：2006-04-06
申请人： Naoharu Yanagawa , Masufumi Asada , Kunihiko Horikawa , Akira Shirota
发明人： Naoharu Yanagawa , Masufumi Asada , Kunihiko Horikawa , Akira Shirota
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/0941 , G11B7/0948 , G11B7/0953 , G11B7/0956
摘要： A recording device (1T or the like) is provided with (i) recording elements (50, 40) for recording data by irradiating a recording medium with laser beams; (ii) driving members (33T, 33F, 55T, 55F, 54) for performing tracking process or focusing process; (iii) a servo elements (31T, 31F) for automatically controlling the driving members based on an error signal; (iv) specifying elements (21, 22) for specifying an area where a recording medium characteristic (core eccentricity or the like) is not good, based on a high frequency component included in the error signal; and (v) a control unit (10) for (v-i) controlling the servo unit to change the gain in the automatic control, and for (v-ii) controlling the recording elements to change the recording power of the laser beams, in the specified area.
摘要翻译：记录装置（1T等）设置有：（i）通过用激光束照射记录介质来记录数据的记录元件（50,40）; （ii）用于执行跟踪处理或聚焦处理的驱动构件（33T，33F，55T，55F，54）（iii）用于基于误差信号自动控制驱动部件的伺服元件（31T，31F）（iv）基于所述误差信号中包含的高频分量，指定用于指定记录介质特性（磁芯偏心度等）不好的区域的元件（21,22）; 以及（v）控制单元（10），用于（vi）控制所述伺服单元改变所述自动控制中的增益，并且（v-ii）控制所述记录元件以改变所述激光束的记录功率，指定区域。

49. 发明申请

US20090196130A1 INFORMATION RECORDING/REPRODUCING APPARATUS 审中-公开
标题翻译：信息记录/再现设备
公开(公告)号：US20090196130A1
公开(公告)日：2009-08-06
申请号：US12065535
申请日：2006-08-29
申请人： Naoharu Yanagawa , Akira Shirota
发明人： Naoharu Yanagawa , Akira Shirota
IPC分类号： G11B7/085
CPC分类号： G11B7/0941 , G11B7/0908
摘要： The present invention is directed to improve precision of tracking correction and focus correction while assuring stability of the tracking correction and focus correction during recording/reproducing of data to/from an optical disk.Before start of recording/reproduction, an optical disk DK is searched once. On the basis of a radial acceleration component in a tracking error signal Ste, an area where a mechanical distortion occurs in the optical disk DK is specified. At the time of actually recording/reproducing data to/from the optical disk DK, the gain in a tracking servo circuit TS is temporarily improved only at the time of recording/reproducing data to/from the area specified as an area where a mechanical distortion or the like occurs. Also, even in the case where the gain is varied by performing optimum phase compensation on the gain set by using an optimum phase compensation by-gain circuit 23, reliable phase compensation is realized. Concerning the focus correction, also, gain compensation and phase compensation are performed using a method similar to that of the tracking correction.
摘要翻译：本发明旨在提高跟踪校正和聚焦校正的精度，同时确保在向/从光盘记录/再现数据期间的跟踪校正和聚焦校正的稳定性。在开始记录/再现之前，一次搜索光盘DK。基于跟踪误差信号Ste中的径向加速度分量，指定在光盘DK中发生机械失真的区域。在向/从光盘DK实际记录/再现数据时，跟踪伺服电路TS中的增益仅在记录/再现数据时指定为区域的区域时暂时改善，其中机械失真等发生。此外，即使在通过使用最佳相位补偿旁路增益电路23对增益设置进行最佳相位补偿来改变增益的情况下，也可以实现可靠的相位补偿。关于聚焦校正，还使用与跟踪校正类似的方法来执行增益补偿和相位补偿。

50. 发明申请

US20090052302A1 Recording Apparatus and Recording Medium, and Computer Program 失效
标题翻译：记录设备和记录介质，以及计算机程序
公开(公告)号：US20090052302A1
公开(公告)日：2009-02-26
申请号：US11918345
申请日：2006-04-13
申请人： Naoharu Yanagawa , Akira Shirota
发明人： Naoharu Yanagawa , Akira Shirota
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/1353 , G11B7/1369 , G11B2007/0006
摘要： A recording apparatus includes: a recording device for recording data onto each of a plurality of types of recording media by irradiating a light beam corresponding to each of the types of recording media; a diffracting device disposed on an optical path of the light beam from the recording device to the recording medium, for generating a main beam and a plurality of sub beams by diffracting the optical beam, the main beam recording data and performing a tracking process, the sub beams performing the tracking process, an amplitude of a tracking signal generated by each or one portion of the sub beams and by the main beam being maximum; a controlling device for controlling the diffracting device to adjust a position on which each of the plurality of sub beams is focused, in accordance with the type of the recording medium; and a tracking device.
摘要翻译：记录装置包括：记录装置，用于通过照射与每种类型的记录介质对应的光束来将数据记录在多种类型的记录介质中的每一种上; 衍射装置，其设置在从记录装置到记录介质的光束的光路上，用于通过衍射光束，主光束记录数据和执行跟踪处理来生成主光束和多个子光束，执行跟踪处理的子光束，由子光束的每个或一部分以及主光束产生的跟踪信号的幅度最大; 控制装置，用于根据记录介质的类型，控制衍射装置调整多个子光束中的每一个被聚焦的位置; 和跟踪装置。

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