公开(公告)号：US08068403B2

公开(公告)日：2011-11-29

申请号：US12090144

申请日：2006-10-13

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

公开(公告)号：US07869331B2

公开(公告)日：2011-01-11

申请号：US12279061

申请日：2007-02-13

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

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

IPC分类号： G11B7/135

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback.

摘要翻译： 光头包括从光盘的反射光的光束提取不包括光束的光轴的至少第一光束分支​​的全息图; 以及光接收器，其接收来自光盘的反射光并产生信号输出，其中光电检测器具有光接收区域，其接收来自用于记录或回放的光信息记录介质层的反射光的第一光束分支 光盘的多个光信息记录介质层，光接收区域被放置成使得由来自光信息记录介质层的反射光的由第一光束分支​​形成的光斑产生的信号输出 在第一和第二光电检测区域之间进行记录或重放的目标实际上相同，并且光接收区域的边界线位于不包括由来自光信息的反射光的光通量形成的光点的位置 记录介质层以外的光信息记录介质层 录音或播放。

公开(公告)号：US07821903B2

公开(公告)日：2010-10-26

申请号：US11980434

申请日：2007-10-31

申请人： Hideki Nakata ,  Akihiro Arai ,  Hiroshi Shibata ,  Yoichi Yamamoto

发明人： Hideki Nakata ,  Akihiro Arai ,  Hiroshi Shibata ,  Yoichi Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G11B7/1263 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup device has a first light source and a second light source each adapted for outputting a laser beam of a predetermined wavelength, a photodetector for detecting an intensity of the laser beam outputted from the first light source or the second light source to control the power of the laser beam to be outputted from the first light source or the second light source, a wideband quarter wavelength plate for converting the laser beam outputted from the first light source or the second light source into a circularly polarized laser beam, and a first rise-up mirror and a second rise-up mirror for guiding a P-polarized component in the laser beam converted by the wideband quarter wavelength plate to the photodetector, and guiding an S-polarized component in the laser beam different from the P-polarized component to an optical recording medium. With this arrangement, provided are an optical pickup device and an optical recording medium driving device capable of accurately controlling the power of the light source.

摘要翻译： 光拾取装置具有第一光源和第二光源，每个第一光源和第二光源适于输出预定波长的激光束;光检测器，用于检测从第一光源或第二光源输出的激光束的强度， 从第一光源或第二光源输出的激光束的功率;宽带四分之一波长板，用于将从第一光源或第二光源输出的激光束转换为圆偏振激光束;以及第一 上升反射镜和用于将由宽带四分之一波长板转换的激光束中的P偏振分量引导到光电检测器的第二上升反射镜，并且引导与P偏振光不同的激光束中的S偏振分量 分量到光记录介质。 利用这种布置，提供了能够精确地控制光源的功率的光学拾取装置和光学记录介质驱动装置。

公开(公告)号：US07746736B2

公开(公告)日：2010-06-29

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, objective lens, light splitting means, light receiving element, tracking error signal detection means, and spherical aberration detection means. Light splitting means has six regions divided by a first splitting line parallel to a longitudinal direction of information tracks, and second and third splitting lines perpendicular to the first line. Spherical aberration detection means compares a first focal point shift amount obtained by detecting a light spot size formed by focusing light fluxes, created by laser light passing through two regions between the second and third splitting lines, onto the light receiving element, and a second focal point shift amount obtained by detecting light spot size formed by focusing light fluxes, created by laser light passing through the four regions, on the outer side of second and third splitting lines, generating a spherical aberration error signal for detecting spherical aberration 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。 分光装置具有由平行于信息轨道的纵向方向的第一分割线和与第一行垂直的第二和第三分割线划分的六个区域。 球面像差检测装置将通过检测由通过第二和第三分割线之间的两个区域的激光产生的聚焦光束形成的光点尺寸获得的第一焦点位移量与第二焦点 通过检测通过聚焦通过四个区域的激光产生的光束形成的光点尺寸而获得的点移位量在第二和第三分割线的外侧上，产生用于检测物镜处的球面像差的球面像差误差信号 。

公开(公告)号：US20090257340A1

公开(公告)日：2009-10-15

申请号：US12090144

申请日：2006-10-13

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Kousei Sano ,  Yoshiaki Komma ,  Akihiro Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/0908 ,  G11B7/1381 ,  G11B2007/0013

摘要： To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc.The head includes: a first optical system for converging light from a light source on a first or second storage layer; a second optical system for receiving and transmitting light reflected from the first layer and stray light reflected from the second layer when the light is converged on the first layer; a photodetector; and a calculator. The photosensitive areas of the photodetector output signals representing intensities of the light incident there through the second system. The reflected and stray light incident on the second system interfere with each other, and the first and second groups of areas are arranged so as to be equally affected by a variation in intensity caused by the interference. The calculator calculates the difference between sum of a first group of signals supplied from a first group of areas and that of a second group of signals supplied from a second group of areas, thereby generating a focus error signal.

摘要翻译： 通过减少由多层光盘的非读取层反射的光的干扰的影响来提供光学头来产生良好的伺服和读取信号。 头部包括：第一光学系统，用于将来自光源的光聚焦在第一或第二存储层上; 第二光学系统，用于当所述光会聚在所述第一层上时，接收和发射从所述第一层反射的光和从所述第二层反射的杂散光; 光检测器; 和一个计算器。 光电检测器的光敏区域输出表示通过第二系统入射到那里的光的强度的信号。 入射在第二系统上的反射和杂散光彼此干涉，并且第一和第二组区域被布置成等同地受到由干涉引起的强度变化的影响。 计算器计算从第一组区域提供的第一组信号和从第二组区域提供的第二组信号的第一组信号的和之间的差，从而产生聚焦误差信号。

公开(公告)号：US20080084798A1

公开(公告)日：2008-04-10

申请号：US11981366

申请日：2007-10-31

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：US20070195664A1

公开(公告)日：2007-08-23

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.

公开(公告)号：US6042708A

公开(公告)日：2000-03-28

申请号：US949433

申请日：1997-10-14

申请人： Hiroaki Nakanishi ,  Akihiro Arai ,  Yosuke Iwata

发明人： Hiroaki Nakanishi ,  Akihiro Arai ,  Yosuke Iwata

IPC分类号： G01N27/447 ,  G01N37/00 ,  G01N27/26

CPC分类号： G01N27/44791 ,  G01N27/44721

摘要： In order to irradiate a constant range of a separation passage of a microchip, light from a light source linearly extending along the separation passage is transmitted through a cylindrical lens and a bandpass filter and introduced into the separation passage. The light transmitted through the separation passage of the microchip is introduced into a photocell array through a cylindrical lens and detected. Measurement is repetitively performed and accumulated to determine migration patterns.

摘要翻译： 为了照射微芯片的分离通道的恒定范围，来自沿着分离通道线性延伸的光源的光透射通过柱面透镜和带通滤光器并被引入到分离通道中。 通过微芯片的分离通道传输的光通过柱面透镜被引入到光电池阵列中并进行检测。 重复执行和累积测量以确定迁移模式。

公开(公告)号：US5790504A

公开(公告)日：1998-08-04

申请号：US657741

申请日：1996-05-31

申请人： Takao Hayashi ,  Toru Nakamura ,  Akihiro Arai

发明人： Takao Hayashi ,  Toru Nakamura ,  Akihiro Arai

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B11/105 ,  G11B7/08

CPC分类号： G11B7/1356 ,  G11B11/10543 ,  G11B7/123

摘要： A magneto-optical pick-up for recording and reproducing information to an information recording medium comprises an optical module comprising an integral light emitting element and receptor element having plural light reception areas, and a diffraction grating on the light incident/emission plane, an objective lens, a polarizing prism provided integrally to the optical module in the light path between the light-emitting element and an objective lens and having the reflectivity and transmittance differing for P-polarized and S-polarized lights, and a polarizing element provided internally or integrally to the optical module which divides the light reflected by or passed through the polarizing prism into light having at least two mutually-perpendicular polarization components to guide the divided lights to the receptor element.

摘要翻译： 用于向信息记录介质记录和再现信息的磁光拾取器包括：光学模块，包括具有多个光接收区域的整体发光元件和接收元件，以及在光入射/发射平面上的衍射光栅， 透镜，在发光元件和物镜之间的光路中与光学模块整体设置并且具有对于P偏振和S偏振光不同的反射率和透射率的偏振棱镜，以及设置在内部或整体上的偏振元件 涉及将由偏振棱镜反射或通过偏振棱镜的光分成具有至少两个相互垂直的偏振分量的光的光学模块，以将分光引导到受体元件。

公开(公告)号：US5758219A

公开(公告)日：1998-05-26

申请号：US850860

申请日：1997-05-02

申请人： Akihiro Arai

发明人： Akihiro Arai

IPC分类号： F16D63/00 ,  F16H1/06 ,  G03B19/12 ,  G03B17/00

CPC分类号： G03B19/12

摘要： A brake apparatus includes a reciprocally rotating member which reciprocally rotates by an angular displacement smaller than 360.degree.. Two cam surfaces of different shapes are formed on the reciprocally rotating member. A brake drum rotates in association with the reciprocally rotating member. A brake lever is provided with a control arm which engages with a cam surface, and a brake arm which engages with the brake drum. The brake lever swings the brake arm toward or away from the brake drum in accordance with the shape of a cam surface. The control arm of the brake lever can elastically deform, so that it can be located in a position in which it can selectively engage with one of the cam surfaces at the same phase of rotation of the reciprocally rotating member during the forward and reverse rotations thereof.

摘要翻译： 制动装置包括往复旋转小于360°的角位移的往复旋转构件。 在往复旋转的构件上形成两个不同形状的凸轮表面。 制动鼓与往复旋转构件相关联地旋转。 制动杆设置有与凸轮表面接合的控制臂和与制动鼓接合的制动臂。 制动杆根据凸轮表面的形状使刹车臂朝向或远离制动鼓摆动。 制动杆的控制臂可以弹性变形，使得其可以位于可以在往复旋转构件的正向和反向旋转期间的相同旋转相位期间与其中一个凸轮表面选择性地接合的位置 。