公开(公告)号：US07463561B2

公开(公告)日：2008-12-09

申请号：US11789078

申请日：2007-04-23

申请人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

发明人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

公开(公告)号：US20070237040A1

公开(公告)日：2007-10-11

申请号：US11810077

申请日：2007-06-04

申请人： Fumitomo Yamasaki ,  Akihiro Arai

发明人： Fumitomo Yamasaki ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/1392 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0956 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1381

摘要： An optical head comprising a light source, an objective lens, a light splitting means, a light receiving element, a tracking error signal detection means, and a spherical aberration detection means, wherein the light splitting means has six regions that are divided by a first splitting line that is substantially parallel to a longitudinal direction of an information tracks, and by second and third splitting lines perpendicular to the first splitting line. The spherical aberration detection means compares a first focal point shift amount obtained by detecting the size of a light spot formed by focusing the light fluxes created by laser light passing through two regions that are disposed between the second and third splitting lines, onto the light receiving element, and a second focal point shift amount obtained by detecting the size of a light spot formed by focusing the light fluxes created by laser light passing through the four regions, which are disposed on the outer side of the second and third splitting lines, to generate a spherical aberration error signal for detecting the spherical aberration generated at the objective lens.

摘要翻译： 一种光头，包括光源，物镜，分光装置，光接收元件，跟踪误差信号检测装置和球面像差检测装置，其中分光装置具有六个区域，其被第一 基本上平行于信息轨迹的纵向的分割线，以及垂直于第一分割线的第二和第三分割线。 球面像差检测装置将通过将通过设置在第二和第三分割线之间的两个区域的激光产生的光束聚焦而形成的光斑的大小获得的第一焦点偏移量进行比较， 以及第二焦点偏移量，其通过将通过将穿过设置在第二和第三分割线的外侧上的四个区域的激光产生的光束聚焦形成的光斑的大小， 产生用于检测在物镜处产生的球面像差的球面像差误差信号。

公开(公告)号：US07227819B2

公开(公告)日：2007-06-05

申请号：US10646602

申请日：2003-08-22

申请人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

发明人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

摘要翻译： 本发明的光信息装置包括：光拾取头，包括：光源; 衍射单位; 冷凝单元; 分束器; 光检测器; 和跟踪误差信号发生器。 光记录介质具有基本上以恒定间距布置的轨道。 平均音高是tp。 当主光束被放置在轨道上时，第一子光束和第二子光束被放置在轨道之间。 跟踪误差信号发生器对从接收主波束的光接收部分输出的信号执行差分运算，产生第一推挽信号，对从光接收部分输出的信号执行差分运算 接收第一子光束和第二子光束以产生第二推挽信号，并且相对于第一推挽信号和第二推挽信号执行差分算术运算以产生跟踪误差信号， 当在与光记录介质的轨道正交的方向上扫描光束时，以间距tp获得的第一推挽信号的幅度波动的情况。

公开(公告)号：US06970404B2

公开(公告)日：2005-11-29

申请号：US09972701

申请日：2001-10-05

申请人： Fumitomo Yamasaki ,  Hideki Aikoh ,  Akihiro Arai ,  Tohru Nakamura

发明人： Fumitomo Yamasaki ,  Hideki Aikoh ,  Akihiro Arai ,  Tohru Nakamura

IPC分类号： G11B7/09 ,  G11B7/095 ,  G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0901 ,  G11B7/0956

摘要： An information recording/reproducing apparatus includes a focusing optical system for focusing light from a light source on an information recording medium as a light spot and an error signal generation system for generating an error signal that represents the positional deviation between an information track and the light spot on the information recording medium from the light reflected by the information recording medium. The apparatus further includes a tilt measurement system for measuring the amount of relative inclination between the focusing optical system and the information recording medium and an offset application system for performing off-track of the light spot by applying an electric offset corresponding to the measured amount of inclination to the error signal. Since the electric offset that corresponds to the amount of inclination is added directly to the error signal, the apparatus does not require a complicated algorithm and can improve the recording and reproduction characteristics easily at low cost.

摘要翻译： 一种信息记录/再现装置，包括用于将来自光源的光聚焦在作为光点的信息记录介质上的聚焦光学系统和用于产生表示信息光道与光线之间的位置偏差的误差信号的误差信号发生系统 从信息记录介质反射的光线在信息记录介质上点光。 该装置还包括倾斜测量系统，用于测量聚焦光学系统和信息记录介质之间的相对倾斜度，以及偏移应用系统，用于通过施加与所测量的测量量相对应的电偏移来执行光点的偏离轨迹 倾斜于误差信号。 由于对应于倾斜量的电偏移直接与误差信号相加，因此该装置不需要复杂的算法，并且可以以低成本容易地提高记录和再现特性。

公开(公告)号：US08493824B2

公开(公告)日：2013-07-23

申请号：US12089984

申请日：2006-10-10

申请人： Fumitomo Yamasaki ,  Akihiro Arai ,  Hideki Aikoh

发明人： Fumitomo Yamasaki ,  Akihiro Arai ,  Hideki Aikoh

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0943

摘要： A tilt can be detected highly accurately by minimizing the tilt detection error. An optical head includes: an objective lens for converging a light beam from a light source onto an optical disc; a photodetector section receiving the beam, reflected from the disc, at divided areas on its photodetection plane and outputting light detection signals from those areas; and a tilt detecting section for detecting a relative tilt between the lens and disc based on the detection signals. The tilt detecting section generates a first push-pull signal PP1 based on the detection signals supplied from a first group of areas, which are arranged symmetrically to a virtual reference line drawn parallel to a disc radial direction and crossing an optical axis, also generates a second push-pull signal PP2 based on the detection signals supplied from a second group of areas, different from the first group and also arranged symmetrically to the reference line, changes coefficients k according to the location of the lens in a disc radial direction, and generates a tilt detection signal TLT by TLT=PP1−k×PP2.

摘要翻译： 通过最小化倾斜检测误差可以高精度地检测倾斜。 光头包括：用于将来自光源的光束会聚到光盘上的物镜; 光接收器部分，在光检测平面上的分割区域处接收从光盘反射的光束，并从这些区域输出光检测信号; 以及倾斜检测部分，用于基于检测信号检测透镜和光盘之间的相对倾斜度。 倾斜检测部基于从与盘径向平行且与光轴交叉的虚拟参考线对称地配置的第一组区域提供的检测信号，生成第一推挽信号PP1，也产生 基于从与第一组不同的第二组区域提供的并且对称地布置到参考线的检测信号的第二推挽信号PP2根据透镜在盘径向的位置改变系数k，以及 通过TLT = PP1-k×PP2生成倾斜检测信号TLT。

公开(公告)号：US08473972B2

公开(公告)日：2013-06-25

申请号：US13418672

申请日：2012-03-13

申请人： Noriaki Terahara ,  Shinsuke Hatanaka ,  Toshiyasu Tanaka ,  Takeshi Ohta ,  Fumitomo Yamasaki

发明人： Noriaki Terahara ,  Shinsuke Hatanaka ,  Toshiyasu Tanaka ,  Takeshi Ohta ,  Fumitomo Yamasaki

IPC分类号： G11B7/12

CPC分类号： G11B7/121

摘要： An optical pickup includes a lens holder; an objective lens provided on the lens holder and having an effective region for collecting light from a light source and an edge located outer to the effective region; and a lens protector provided on the lens holder. The lens protector protrudes toward an optical disc more than the objective lens. The edge of the objective lens includes a convexed portion protruding toward the optical disc. An apex of the effective region of the objective lens protrudes toward the optical disc more than the convexed portion of the edge. A straight line connecting a part of the edge of the objective lens and a part of the lens protector is closer to the optical disc than the apex of the effective region of the objective lens.

摘要翻译： 光学拾取器包括透镜保持器; 设置在所述透镜架上并具有用于收集来自光源的光的有效区域和位于所述有效区域外部的边缘的物镜; 以及设置在透镜架上的透镜保护器。 镜头保护器比物镜更向外突出。 物镜的边缘包括向光盘突出的凸出部分。 物镜的有效区域的顶点比边缘的凸起部分向光盘突出。 连接物镜的边缘的一部分和透镜保护器的一部分的直线比物镜的有效区域的顶点更靠近光盘。

公开(公告)号：US08243111B2

公开(公告)日：2012-08-14

申请号：US12597305

申请日：2008-04-21

申请人： Fumitomo Yamasaki ,  Joji Anzai ,  Naohiro Kimura ,  Takashi Nishihara

发明人： Fumitomo Yamasaki ,  Joji Anzai ,  Naohiro Kimura ,  Takashi Nishihara

IPC分类号： B41J2/47

CPC分类号： B41J2/32 ,  B41J2/471 ,  B41J2/475 ,  B41M5/26 ,  B41M2205/04

摘要： A thermosensitive recording printer is provided with semiconductor lasers 1a to 1c, a polygon mirror 7 for condensing laser light emitted from the semiconductor laser 1a to 1c as condensed spots on a recording medium 10 to perform scanning in a main scanning direction, and a control unit 9 for controlling the output of the laser light. If a ratio of a spot diameter D1 of the condensed spots in the main scanning direction and a spot diameter D2 in a sub scanning direction satisfy a relationship of D1/D2≦½ at the time of forming an image composed of a plurality of pixels on the recording medium 10 using laser light, high-speed thermosensitive recording and a recording method with an uncomplicated power control are realized without reducing the power density of the condensed spots.

摘要翻译： 热敏记录打印机设置有半导体激光器1a至1c，用于将从半导体激光器1a至1c发射的激光聚焦到记录介质10上的聚光点的多面反射镜7，以在主扫描方向上执行扫描;以及控制单元 9用于控制激光的输出。 如果在主扫描方向上的聚光点的光斑直径D1与副扫描方向上的光斑直径D2之间的比例满足D1 / D2＆nlE; 1/2时的关系，则形成由多个像素组成的图像时 在不降低凝聚点的功率密度的情况下，实现使用激光的记录介质10，高速热敏记录和具有不复杂功率控制的记录方法。

公开(公告)号：US07773468B2

公开(公告)日：2010-08-10

申请号：US11570821

申请日：2006-04-11

申请人： Fumitomo Yamasaki ,  Eishin Mori ,  Hideki Aikoh ,  Akihiro Arai ,  Joji Anzai

发明人： Fumitomo Yamasaki ,  Eishin Mori ,  Hideki Aikoh ,  Akihiro Arai ,  Joji Anzai

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B7/1376 ,  G11B2007/0013

摘要： Fifth order spherical aberration in addition to third order spherical aberration for an optical information recording medium of which thickness of a light transmission layer changes greatly is corrected. An objective lens collects a laser beam emitted from a semiconductor laser on an optical information recording medium. A spherical aberration correcting portion corrects spherical aberration generated according to a thickness of the light transmission layer of the optical information recording medium, in which the spherical aberration correcting portion includes a collimator lens, a lens holder and a stepping motor for correcting the third order spherical aberration and a liquid crystal element and an applied voltage control portion for correcting the fifth order spherical aberration.

摘要翻译： 校正光传输层的厚度变化较大的光信息记录介质的三阶球面像差的第五级球面像差。 物镜将从半导体激光器发射的激光束收集在光学信息记录介质上。 球面像差校正部分校正根据光学信息记录介质的光透射层的厚度产生的球面像差，其中球面像差校正部分包括准直透镜，透镜保持器和用于校正三阶球面的步进电机 像差和用于校正五阶球面像差的液晶元件和施加电压控制部分。

公开(公告)号：US20090046564A1

公开(公告)日：2009-02-19

申请号：US12293291

申请日：2007-03-19

申请人： Fumitomo Yamasaki ,  Hideki Aikoh ,  Akihiro Arai

发明人： Fumitomo Yamasaki ,  Hideki Aikoh ,  Akihiro Arai

IPC分类号： G11B7/135

CPC分类号： G11B7/0956 ,  G11B7/1378 ,  G11B7/13927 ,  G11B2007/0006

摘要： In an optical head (10) used for an optical disc (30) in which light-transmitting layers largely change in thickness, a degree-of-diversion/convergence enlarging member (20) fixed between a collimating lens (4) and an objective lens (6) is arranged. With this configuration, a moving range of the collimating lens can be reduced, and the optical head can be miniaturized.

摘要翻译： 在用于其中透光层厚度变化很大的光盘（30）的光学头（10）中，固定在准直透镜（4）和物镜（4）之间的分度/会聚放大部件（20） 配置透镜（6）。 利用这种配置，可以减小准直透镜的移动范围，并且可以使光学头小型化。

公开(公告)号：US07460448B2

公开(公告)日：2008-12-02

申请号：US11789106

申请日：2007-04-23

申请人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

发明人： Shin-ichi Kadowaki ,  Kousei Sano ,  Akihiro Arai ,  Katsuhiko Yasuda ,  Tomotada Kamei ,  Hiroaki Yamamoto ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0948 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/13927 ,  G11B2007/0013

摘要： An optical information apparatus of the present invention includes: an optical pick-up head including: a light source; a diffraction unit; a condensing unit; a beam splitter; a photodetector; and a tracking error signal generator. An optical recording medium has tracks arranged substantially at a constant pitch. An average of a pitch is tp. When a main beam is placed on the track, a first sub-beam and a second sub-beam are placed between the tracks. The tracking error signal generator performs a differential arithmetic operation with respect to signals output from a light-receiving portion receiving the main beam to generate a first push-pull signal, performs a differential arithmetic operation with respect to signals output from the light-receiving portions receiving the first sub-beam and the second sub-beam to generate a second push-pull signal, and performs a differential arithmetic operation with respect to the first push-pull signal and the second push-pull signal to generate a tracking error signal, in a case where an amplitude of the first push-pull signal obtained at the pitch tp is fluctuated when the light beam is scanned in a direction orthogonal to the tracks of the optical recording medium.

摘要翻译： 本发明的光信息装置包括：光拾取头，包括：光源; 衍射单位; 冷凝单元; 分束器; 光检测器; 和跟踪误差信号发生器。 光记录介质具有基本上以恒定间距布置的轨道。 平均音高是tp。 当主光束被放置在轨道上时，第一子光束和第二子光束被放置在轨道之间。 跟踪误差信号发生器对从接收主波束的光接收部分输出的信号执行差分运算，产生第一推挽信号，对从光接收部分输出的信号执行差分运算 接收第一子光束和第二子光束以产生第二推挽信号，并且相对于第一推挽信号和第二推挽信号执行差分算术运算以产生跟踪误差信号， 当在与光记录介质的轨道正交的方向上扫描光束时，以间距tp获得的第一推挽信号的幅度波动的情况。