公开(公告)号：US5448535A

公开(公告)日：1995-09-05

申请号：US209599

申请日：1994-03-10

申请人： Goro Fujita ,  Kiyoshi Toyota ,  Shoji Iwaasa ,  Hiroshi Kashiwagi

发明人： Goro Fujita ,  Kiyoshi Toyota ,  Shoji Iwaasa ,  Hiroshi Kashiwagi

IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10576

摘要： A head position controlling device in which the head position may be controlled accurately even with a magneto-optical disc having regions with different reflectance values. A gap sensor consisting of a light emitting element 5 and light receiving elements 6 and 7 are arrayed along the track direction of a magneto-optical disc to prevent unequilibrium in the volume of received light at the light receiving elements 6 and 7.

摘要翻译： 一种头位置控制装置，其中即使使用具有不同反射率值的区域的磁光盘也可以精确地控制头部位置。 由发光元件5和光接收元件6和7组成的间隙传感器沿磁光盘的磁道方向排列，以防止在光接收元件6和7处的接收光的体积不平衡。

公开(公告)号：US20100103801A1

公开(公告)日：2010-04-29

申请号：US12605500

申请日：2009-10-26

申请人： Motoo Aiba ,  Kiyoshi Toyota ,  Hiroyuki Sakakibara ,  Toyokazu Takahashi ,  Kouhei Anju ,  Kenichi Ogawa

发明人： Motoo Aiba ,  Kiyoshi Toyota ,  Hiroyuki Sakakibara ,  Toyokazu Takahashi ,  Kouhei Anju ,  Kenichi Ogawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/13925

摘要： Provided is an objective lens for which expressions 0.83

摘要翻译： 提供了满足表达式0.83 <（pM / pL）<1.17和0.83 <（pM / pT）<1.17或表达式0.80 <（pM / pL）<1.20和0.86 <（pM / pT）<1.14的物镜 ，其中pL是五阶球面像差与三阶球面像差的比率，球面像差是由光记录介质的覆盖层的厚度差引起的，pT是五阶球面像差的比率 到三阶球面像差，球面像差是由物镜的环境温度变化引起的，pM是五阶球面像差与三阶球面像差的比值，球面像差是由 事件放大的变化。

公开(公告)号：US07345982B2

公开(公告)日：2008-03-18

申请号：US10494304

申请日：2002-11-19

申请人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Satoru Ishii ,  Takeshi Kubo ,  Masahiro Saito

发明人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Satoru Ishii ,  Takeshi Kubo ,  Masahiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/1381

摘要： An optical pickup device is provided which includes a double-wavelength objective lens (34) that collects a light beam selectively emitted from a light-emitting/-detecting element (31) that selectively emits a plurality of light beams different in wavelength from each other, and also return light from an optical disk (2), a first diffraction grating (45) that splits the light beam emitted from a light-emitting/-detecting element (31) into three beams including a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts the return light for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects a light-path deviation by diffracting the positive first-order light beam diffracted by the second diffraction grating (46). The light-emitting/-detecting element (31) provides a focusing error signal FE by detecting the negative first-order light beam diffracted by the third diffraction element (47), and a tracking error signal by detecting return portions of the positive and negative first-order light beams from the first diffraction grating (45).

摘要翻译： 提供了一种光拾取装置，其包括聚焦从选择性地发射彼此波长不同的多个光束的发光/检测元件（31）选择性发射的光束的双波长物镜（34） 并且还从光盘（2）返回光，将从发光/检测元件（31）发射的光束分割成包括零级光束和正的光束的三束光的第一衍射光栅（45） 和负的一级光束，衍射沿着与输出光分离的光路行进的返回光的第二衍射光栅（46），以及通过以下方式校正光路偏差的第三衍射光栅（47） 衍射由第二衍射光栅（46）衍射的正一级光束。 发光/检测元件（31）通过检测由第三衍射元件（47）衍射的负一级光束来提供聚焦误差信号FE，以及通过检测正和负的返回部分的跟踪误差信号 来自第一衍射光栅（45）的一阶光束。

公开(公告)号：US20050162995A1

公开(公告)日：2005-07-28

申请号：US10494304

申请日：2002-11-19

申请人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Satoru Ishii ,  Takeshi Kubo ,  Masahiro Saito

发明人： Norio Fukasawa ,  Junichi Suzuki ,  Kiyoshi Toyota ,  Tetsu Tanaka ,  Satoru Ishii ,  Takeshi Kubo ,  Masahiro Saito

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/1381

摘要： An optical pickup device is provided which includes a double-wavelength objective lens (34) that collects a light beam selectively emitted from a light-emitting/-detecting element (31) that selectively emits a plurality of light beams different in wavelength from each other, and also return light from an optical disk (2), a first diffraction grating (45) that splits the light beam emitted from a light-emitting/-detecting element (31) into three beams including a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts the return light for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects a light-path deviation by diffracting the positive first-order light beam diffracted by the second diffraction grating (46). The light-emitting/-detecting element (31) provides a focusing error signal FE by detecting the negative first-order light beam diffracted by the third diffraction element (47), and a tracking error signal by detecting return portions of the positive and negative first-order light beams from the first diffraction grating (45).

摘要翻译： 提供了一种光拾取装置，其包括聚焦从选择性地发射彼此波长不同的多个光束的发光/检测元件（31）选择性发射的光束的双波长物镜（34） 并且还从光盘（2）返回光，将从发光/检测元件（31）发射的光束分割成包括零级光束和正的光束的三束光的第一衍射光栅（45） 和负的一级光束，衍射沿着与输出光分离的光路行进的返回光的第二衍射光栅（46），以及通过以下方式校正光路偏差的第三衍射光栅（47） 衍射由第二衍射光栅（46）衍射的正一级光束。 发光/检测元件（31）通过检测由第三衍射元件（47）衍射的负一级光束来提供聚焦误差信号FE，以及通过检测正和负的返回部分的跟踪误差信号 来自第一衍射光栅（45）的一阶光束。

公开(公告)号：US08226245B2

公开(公告)日：2012-07-24

申请号：US11786339

申请日：2007-04-11

申请人： Mitsunori Ueda ,  Yoshihiro Oshima ,  Kazutoshi Yamamoto ,  Kiyoshi Toyota ,  Atsuhiko Wajiki ,  Yuji Kato ,  Olivier Ripoll ,  Juan Manuel Teijiro

发明人： Mitsunori Ueda ,  Yoshihiro Oshima ,  Kazutoshi Yamamoto ,  Kiyoshi Toyota ,  Atsuhiko Wajiki ,  Yuji Kato ,  Olivier Ripoll ,  Juan Manuel Teijiro

IPC分类号： G03B21/28

CPC分类号： G02B27/149 ,  G02B27/1046 ,  G02B27/145 ,  H04N9/3105 ,  H04N9/317

摘要： A composite optical element is provided. The composite optical element includes a plurality of optical elements, in which at least one of the optical elements is formed of an element modifying an optical path and the other optical elements are bonded to an incident surface and/or exit surface of the element modifying the optical path with a low refractive index material layer in between.

摘要翻译： 提供复合光学元件。 复合光学元件包括多个光学元件，其中至少一个光学元件由修改光路的元件形成，并且其它光学元件被接合到元件的入射表面和/或出射表面， 光路之间具有低折射率材料层。

公开(公告)号：US20100007860A1

公开(公告)日：2010-01-14

申请号：US11786339

申请日：2007-04-11

申请人： Mitsunori Ueda ,  Yoshihiro Oshima ,  Kazutoshi Yamamoto ,  Kiyoshi Toyota ,  Atsuhiko Wajiki ,  Yuji Kato ,  Olivier Ripoll ,  Juan Manuel Teijiro

发明人： Mitsunori Ueda ,  Yoshihiro Oshima ,  Kazutoshi Yamamoto ,  Kiyoshi Toyota ,  Atsuhiko Wajiki ,  Yuji Kato ,  Olivier Ripoll ,  Juan Manuel Teijiro

IPC分类号： G03B21/28 ,  G02B5/04

CPC分类号： G02B27/149 ,  G02B27/1046 ,  G02B27/145 ,  H04N9/3105 ,  H04N9/317

摘要： A composite optical element is provided. The composite optical element includes a plurality of optical elements, in which at least one of the optical elements is formed of an element modifying an optical path and the other optical elements are bonded to an incident surface and/or exit surface of the element modifying the optical path with a low refractive index material layer in between.

摘要翻译： 提供复合光学元件。 复合光学元件包括多个光学元件，其中至少一个光学元件由修改光路的元件形成，并且其它光学元件被接合到元件的入射表面和/或出射表面， 光路之间具有低折射率材料层。

公开(公告)号：US07248544B2

公开(公告)日：2007-07-24

申请号：US10849158

申请日：2004-05-20

申请人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki ,  Minoru Kubo ,  Souichi Murakami

发明人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki ,  Minoru Kubo ,  Souichi Murakami

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1359 ,  G11B7/1395 ,  G11B7/22

摘要： Disclosed is an optical head in which position adjustment of a photodetector light receiving surface or component parts may be simplified, production costs may be reduced and operational reliability may be improved. The optical head includes a light source 22, radiating light of a preset wavelength, an objective lens 27 for condensing the outgoing light from the light source 22 on an optical disc 2 and for condensing the return light from the optical disc 2, a beam splitter 25 for branching the optical path of the return light reflected by the optical disc 2, and for collimating the branched return light so as to be parallel to the outgoing light from the light source 22, a composite optical component including a splitting prism 30 arranged on a site of incidence of the branched return light for spatially splitting the return light, and a light receiving unit for receiving plural return light beams spatially split by the splitting prism 30 for producing focusing error signals.

摘要翻译： 公开了一种可以简化光电检测器光接收表面或部件的位置调整的光学头，可以降低生产成本并且可以提高操作可靠性。 光头包括一个照射预定波长的光源22，用于将来自光源22的输出光聚焦在光盘2上并用于聚光来自光盘2的返回光的物镜27，一个分束器 25，用于分支由光盘2反射的返回光的光路，并且用于使分支的返回光准直以与来自光源22的出射光平行;复合光学部件，包括分离棱镜30，其布置在 用于空间分离返回光的分支返回光的入射部位，以及用于接收由分割棱镜30空间分裂的多个返回光束的光接收单元，用于产生聚焦误差信号。

公开(公告)号：US06529454B1

公开(公告)日：2003-03-04

申请号：US09508169

申请日：2000-03-08

申请人： Yoshito Asoma ,  Kiyoshi Toyota ,  Noriaki Nishi

发明人： Yoshito Asoma ,  Kiyoshi Toyota ,  Noriaki Nishi

IPC分类号： G11B700

CPC分类号： G11B7/1356 ,  G11B7/00 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1378

摘要： A cylindrical lens 39 for generating focussing error signals is formed as one with a portion of an optical component 33 of a transparent material lying on an optical path L2 that is an optical path of a return light beam from the optical member 33. This configuration assures a small size while reducing the production cost and improving operational reliability.

摘要翻译： 用于产生聚焦误差信号的柱面透镜39形成为具有位于作为来自光学构件33的返回光束的光路的光路L2上的透明材料的光学部件33的一部分的柱面透镜39.这种构造确保 体积小，同时降低生产成本，提高运行可靠性。

公开(公告)号：US07821905B2

公开(公告)日：2010-10-26

申请号：US12032090

申请日：2008-02-15

申请人： Masahiro Saito ,  Kiyoshi Toyota ,  Motoo Aiba

发明人： Masahiro Saito ,  Kiyoshi Toyota ,  Motoo Aiba

IPC分类号： G11B7/00

CPC分类号： G02B27/0037 ,  G02B7/008 ,  G02B7/028 ,  G02B27/4238 ,  G02B27/4283 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/13925

摘要： An optical pickup device is disclosed. The device includes: a light source that emits a light beam of a predetermined wavelength of about 405 nm; an objective lens being a plastic lens provided with, on at least one surface, diffraction means of a zone diffractive structure suppressing generation of aberration to be caused by a temperature change, and has a numerical aperture of 0.82 or larger for gathering the light beam emitted from the light source with respect to an optical disk; and a collimator lens disposed between the light source and the objective lens, and derives a substantially-collimated light by converting an angle of divergence of the light beam emitted from the light source.

摘要翻译： 公开了一种光学拾取装置。 该装置包括：发射约405nm的预定波长的光束的光源; 物镜是在至少一个表面上设置有抑制由温度变化引起的像差产生的区域衍射结构的衍射装置的塑料透镜，并且具有0.82或更大的数值孔径用于收集所发射的光束 从光源相对于光盘; 以及设置在光源和物镜之间的准直透镜，并且通过转换从光源发射的光束的发散角来导出基本上准直的光。

公开(公告)号：US20050281171A1

公开(公告)日：2005-12-22

申请号：US11154575

申请日：2005-06-17

申请人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki

发明人： Masahiro Saito ,  Norio Fukasawa ,  Kiyoshi Toyota ,  Junichi Suzuki

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical pickup apparatus and an optical disc apparatus are adapted to raise the efficiency of utilization of the lasers of the apparatus for accurately detecting tracking errors by raising the intensity ratio of the beam of the 0-th order to the beams of the ±1st orders produced by splitting of the laser beam of the wavelength to be subjected to division by three. The optical pickup apparatus includes a light emitting section for emitting a first laser beam having wavelength λ1 and a second laser beam having wavelength λ2 different from the wavelength λ1, a surface relief type first diffraction grating having a phase height of two steps produced by being equipped with a first phase grating and a second phase grating arranged at opposite sides of the first phase grating and adapted to split the laser beam of the wavelength λ1 into three beams and transmit substantially all of the laser beam of the wavelength λ2, a surface relief type second diffraction grating having a phase height of two steps produced by being equipped with a first phase grating and a second phase grating arranged at opposite sides of the first phase grating and adapted to split the laser beam of the wavelength λ2 into three beams and transmit substantially all of the laser beam of the wavelength λ1, an objective lens for converging the laser beams emitted from the light emitting section onto an optical disc, an optical element for branching the optical paths of return light reflected by the optical disc, and a light receiving section for receiving the return light branched by the optical element.

摘要翻译： 光学拾取装置和光盘装置适于通过提高第0级的光束与±1阶的光束的强度比来提高设备的激光器的利用效率，以准确地检测跟踪误差 通过将待分割的波长的激光束分裂三次而产生。 光拾取装置包括用于发射具有波长λ1的第一激光束和不同于波长λ1的波长λ2的第二激光束的发光部分，具有通过设置产生的相位高度为两级的表面浮雕型第一衍射光栅 具有布置在第一相位光栅的相对侧处的第一相位光栅和第二相位光栅，并且适于将波长λ1的激光束分成三束并且基本上透射波长λ2的所有激光束，表面浮雕型 第二衍射光栅具有通过配备有第一相位光栅和布置在第一相位光栅的相对侧的第二相位光栅产生的两个阶段的相位高度，并且适于将波长λ2的激光束分成三个光束并基本上透射 波长λ1的所有激光束，用于会聚las的物镜 从光发射部分发射到光盘上的光束，用于分支由光盘反射的返回光的光路的光学元件，以及用于接收由光学元件分支的返回光的光接收部分。