公开(公告)号：EP1229533A3

公开(公告)日：2003-09-17

申请号：EP02002572.2

申请日：2002-02-04

申请人： Pioneer Corporation

发明人： Kato, Masahiro ,  Yanagawa, Naoharu ,  Yone, Tatsuhiro ,  Muramatsu, Yuko ,  Suzuki, Shinji

IPC分类号： G11B19/12 ,  G11B7/00 ,  G11B7/013 ,  G11B7/007 ,  G11B27/19 ,  G11B27/24

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反射的记录表面的光，获得推 - 对应于第一和第二光接收面的光接收信号的 - 空信号，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进行判断。 然后根据判断结果设定阈值。

公开(公告)号：EP1195752A2

公开(公告)日：2002-04-10

申请号：EP01123681.7

申请日：2001-10-02

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Sano, Fumihiko

IPC分类号： G11B7/125

CPC分类号： G11B7/126 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365

摘要： A laser light intensity controller includes a polarizing beam splitter (13) for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source (11) travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector (18) for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. An optical element (20) which passes passing only the one polarization component is installed between the light source and the polarizing beam splitter.

摘要翻译： 激光强度控制器包括偏振分束器（13），用于使垂直于从光源（11）发射的激光束行进的方向的x方向偏振分量的大部分中的一个以及y方向偏振分量 与行进方向平行并且用于反射一个偏振分量的一小部分作为监测光;以及光电检测器（18），用于接收反射的监测光以产生光强度信号。 控制器根据光强信号驱动光源。 通过仅通过一个偏振分量的光学元件（20）安装在光源和偏振分束器之间。

公开(公告)号：EP1548712A2

公开(公告)日：2005-06-29

申请号：EP04027982.0

申请日：2004-11-25

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Kato, Masahiro ,  Yone, Tatsuhiro

IPC分类号： G11B7/005

CPC分类号： G11B7/0053 ,  G11B7/0953

摘要： A data reading device which reads data recorded on a data recording medium on which pre-pits are formed in advance, includes a laser light source that emits a light beam, an objective lens that converges the light beam, an actuator that drives the objective lens, a light-receiving unit having first and second light-receiving regions split in a direction of recording tracks which receive a reflected light beam, an amplitude control unit (41,42) that adjusts an amplitude of an output signal output from at least one of the first and second light-receiving regions, a computing unit (33) that computes the output signal thereby generates a push-pull signal, a pre-pit detection unit (34) that detects a pre-pit signal on basis of the push-pull signal, and an extraction unit (44) that extracts an eccentricity component of the data recording medium. Preferably, the amplitude control unit adjusts the amplitude on basis of the eccentricity component.

摘要翻译： 读取记录在预先形成预凹坑的数据记录介质上的数据的数据读取装置包括发射光束的激光光源，会聚光束的物镜，驱动物镜的致动器 ，具有在接收反射光束的记录轨道的方向上分割的第一和第二光接收区域的光接收单元，调整从至少一个输出的输出信号的幅度的幅度控制单元（41,42） 的第一和第二光接收区域的计算单元（33），其计算输出信号从而产生推挽信号;预凹坑检测单元（34），其基于所述推送信号检测预凹陷信号 提取单元（44），其提取数据记录介质的偏心分量。 优选地，振幅控制单元基于偏心分量来调节振幅。

公开(公告)号：EP1538612A2

公开(公告)日：2005-06-08

申请号：EP04025683.6

申请日：2004-10-28

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu

IPC分类号： G11B7/135 ,  G11B7/125

CPC分类号： G11B7/1369 ,  G11B7/1267 ,  G11B7/13925

摘要： An optical recording device includes an optical pickup (2), an asymmetry detection circuit (5), and a microcomputer (6). The optical pickup (2) corrects an aberration of an object lens based on an aberration correction value using a liquid crystal panel (41) in the optical pickup, irradiates a laser beam of multiple stages of recording powers on an optical disk to form marks, and then reproduces the formed marks with a reproduction power. The asymmetry detection circuit (5) detects amplitudes of RF signals of the marks reproduced by the optical pickup (2), calculates amplitude central values such that asymmetry takes a predetermined value, and determines an optimum recording power. The microcomputer (6) performs spherical aberration correction to change a spherical aberration correction value from an initial value such that the optimum recording power takes a minimum value.

摘要翻译： 光学记录装置包括光学拾取器（2），不对称检测电路（5）和微计算机（6）。 光学拾取器（2）使用光学拾取器中的液晶面板（41），基于像差校正值校正物镜的像差，在光盘上照射多级记录功率的激光以形成标记， 然后以再现功率再现形成的标记。 不对称检测电路（5）检测由光学拾取器（2）再现的标记的RF信号的幅度，计算不对称取预定值的幅度中心值，并确定最佳记录功率。 微型计算机（6）进行球面像差校正，以从初始值改变球面像差校正值，使得最佳记录功率达到最小值。

公开(公告)号：EP1213711A3

公开(公告)日：2004-04-07

申请号：EP01127444.6

申请日：2001-11-27

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Kato, Masahiro

IPC分类号： G11B7/095

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 tilt angle adjusting means for adjusting the tilt angle in accordance with the tilt drive signal.

摘要翻译： 一种用于从设备中设置的光记录介质上记录信息并从其再现信息的装置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记录介质的记录表面的光学系统 以及由记录介质的记录表面反射到光电检测器的激光束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。 倾斜伺服控制装置确定光学记录介质的类型，产生倾斜驱动信号，以便减少激光束照射记录表面的位置处的倾斜角度和激光束的光轴。 对应于记录介质类型的倾斜驱动信号，并驱动倾斜角度调节装置，用于根据倾斜驱动信号调整倾斜角度。

公开(公告)号：EP1195751A2

公开(公告)日：2002-04-10

申请号：EP01123680.9

申请日：2001-10-02

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Sano, Fumihiko

IPC分类号： G11B7/125

CPC分类号： G11B7/126 ,  G11B7/1356

摘要： A laser light intensity controller includes a polarizing beam splitter (13) for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source (11) travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector (18) for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. The photodetector reflects the other of the x-direction polarization component and the y-direction polarization component and is not sensitive thereto, and absorbs the one polarization component and is sensitive thereto.

摘要翻译： 激光强度控制器包括偏振分束器（13），用于使垂直于从光源（11）发射的激光束行进的方向的x方向偏振分量的大部分中的一个以及y方向偏振分量 与行进方向平行并且用于反射一个偏振分量的一小部分作为监测光;以及光电检测器（18），用于接收反射的监测光以产生光强度信号。 控制器根据光强信号驱动光源。 光电检测器反射x方向偏振分量和y方向偏振分量中的另一个，并且对其不敏感，并且吸收一个偏振分量并且对其敏感。

公开(公告)号：EP1235214A3

公开(公告)日：2007-04-11

申请号：EP02003817.0

申请日：2002-02-20

申请人： Pioneer Corporation

发明人： Kato, Masahiro ,  Yanagawa, Naoharu ,  Yone, Tatsuhiro ,  Muramatsu, Yuko ,  Suzuki, Shinji

IPC分类号： G11B7/005 ,  G11B7/26 ,  G11B7/0037

CPC分类号： G11B7/268 ,  G11B7/00375 ,  G11B7/0053

摘要： Optical discs with land pre-pits must be inspected after manufacture to determine whether the land pre-pits conform to a prescribed standard. Apparatus for measuring the aperture ratio (i.e. the ratio of the maximum and the minimum peaks of the overlapped waveforms of the radial push-pull signal from the land pre-pits) is disclosed in with the influence of foreign substances on the disc surface is reduced. The apparatus comprises first and second light receiving means, substracting means for generating the push-pull signal, means for collecting sample data by sampling the puh-pull signal for a predetermined period of time and for repeating the predetermined period of sampling a plurality of times, frequency determination means for determining whether each data value corresponding to a pre-pit position of the sample data is obtained by a predetermined number of times or greater and means for calculating the aperture value when data values have been determined a predetermined number of times or greater.

公开(公告)号：EP1213711B1

公开(公告)日：2007-01-31

申请号：EP01127444.6

申请日：2001-11-27

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Kato, Masahiro

IPC分类号： G11B7/095

CPC分类号： G11B7/0956 ,  G11B7/0945 ,  G11B7/1369 ,  G11B2007/0006

公开(公告)号：EP1195751A3

公开(公告)日：2004-06-16

申请号：EP01123680.9

申请日：2001-10-02

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Sano, Fumihiko

IPC分类号： G11B7/125 ,  G11B7/135

CPC分类号： G11B7/126 ,  G11B7/1356

摘要： A laser light intensity controller includes a polarizing beam splitter (13) for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source (11) travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector (18) for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. The photodetector reflects the other of the x-direction polarization component and the y-direction polarization component and is not sensitive thereto, and absorbs the one polarization component and is sensitive thereto.

公开(公告)号：EP1195752A3

公开(公告)日：2004-04-21

申请号：EP01123681.7

申请日：2001-10-02

申请人： Pioneer Corporation

发明人： Yanagawa, Naoharu ,  Sano, Fumihiko

IPC分类号： G11B7/125

CPC分类号： G11B7/126 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365

摘要： A laser light intensity controller includes a polarizing beam splitter (13) for passing most of one of an x-direction polarization component perpendicular to a direction in which a laser beam emitted from a light source (11) travels and a y-direction polarization component parallel with the traveling direction and for reflecting a little portion of the one polarization component as monitoring light, and a photodetector (18) for receiving the reflected monitoring light to generate a light intensity signal. The controller drives the light source in accordance with the light intensity signal. An optical element (20) which passes passing only the one polarization component is installed between the light source and the polarizing beam splitter.

摘要翻译： 激光强度控制器包括：偏振分束器（13），用于使与垂直于从光源（11）发射的激光束行进的方向垂直的x方向偏振分量的大部分中的一个通过;以及y方向偏振分量 与行进方向平行并用于反射一个偏振分量的一小部分作为监测光;以及光检测器（18），用于接收反射的监测光以产生光强度信号。 控制器根据光强度信号驱动光源。 在光源和偏振分束器之间安装仅通过一个偏振分量的光学元件（20）。