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：US20050025002A1

公开(公告)日：2005-02-03

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： G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B7/22 ,  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：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：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。

公开(公告)号：US07616548B2

公开(公告)日：2009-11-10

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

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.

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。

公开(公告)号：US07064900B2

公开(公告)日：2006-06-20

申请号：US10492657

申请日：2002-11-19

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

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

IPC分类号： G02B27/10 ,  G11B7/00 ,  G11B7/135

CPC分类号： G11B7/0908 ,  G11B7/00 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/1356 ,  G11B7/1381

摘要： An optical pickup device is provided which includes a first diffraction grating (45) that splits a light beam emitted from a light-emitting/-detecting element (31) into a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts return light from an optical disk (2) for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects the deviation of the light path 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, 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： 提供了一种光学拾取装置，其包括将从发光/检测元件（31）发射的光束分成零级光束和正和负一级光束的第一衍射光栅（45） 第二衍射光栅（46），衍射来自光盘（2）的返回光，用于沿着与出射光分离的光路行进;以及第三衍射光栅（47），其通过衍射来校正光路的偏差 由第二衍射光栅（46）衍射的正一级光束。 发光/检测元件（31）通过检测负一阶光束提供聚焦误差信号FE，并且通过检测来自第一衍射的正和负一级光束的返回部分来提供跟踪误差信号 光栅（45）。

公开(公告)号：US20050088951A1

公开(公告)日：2005-04-28

申请号：US10492657

申请日：2002-11-19

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

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

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

CPC分类号： G11B7/0908 ,  G11B7/00 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/0916 ,  G11B7/1356 ,  G11B7/1381

摘要： An optical pickup device is provided which includes a first diffraction grating (45) that splits a light beam emitted from a light-emitting/-detecting element (31) into a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts return light from an optical disk (2) for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects the deviation of the light path 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, 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： 提供了一种光学拾取装置，其包括将从发光/检测元件（31）发射的光束分成零级光束和正和负一级光束的第一衍射光栅（45） 第二衍射光栅（46），衍射来自光盘（2）的返回光，用于沿着与出射光分离的光路行进;以及第三衍射光栅（47），其通过衍射来校正光路的偏差 由第二衍射光栅（46）衍射的正一级光束。 发光/检测元件（31）通过检测负一阶光束提供聚焦误差信号FE，并且通过检测来自第一衍射的正和负一级光束的返回部分来提供跟踪误差信号 光栅（45）。

公开(公告)号：US07180668B2

公开(公告)日：2007-02-20

申请号：US11085355

申请日：2005-03-21

申请人： Norio Fukasawa ,  Junichi Suzuki ,  Tetsu Tanaka ,  Takeshi Kubo

发明人： Norio Fukasawa ,  Junichi Suzuki ,  Tetsu Tanaka ,  Takeshi Kubo

IPC分类号： G02B27/44 ,  G02B5/18

CPC分类号： G11B7/0912 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1381

摘要： This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-first-order light, a second diffraction grating (46) for diffracting the optical path of a return light beam from an optical disc (2), and a split prism (47) arranged at a position where the minus-first-order light diffracted by the second diffraction grating (46) is incident and adapted for splitting the minus-first-order light into a plurality of light beams. It also has a light receiving unit (35) for acquiring a focusing error signal FE by receiving each return light beam split by the split prism (47) and for acquiring a tracking error signal by receiving return light beams from the optical disc (2) of the plus-first-order light and the minus-first-order light split by the first diffraction grating (45).

摘要翻译： 本发明是一种具有复合光学元件（32）的光学拾取装置，该复合光学元件具有第一衍射光栅（45），用于将从光源（31）发射的光束分解为零级光，一级光，以及 负一级光，用于衍射来自光盘（2）的返回光束的光路的第二衍射光栅（46）和布置在负一级光的位置处的分割棱镜（47） 由第二衍射光栅（46）衍射的光入射并适于将负一级光分解为多个光束。 它还具有一个光接收单元（35），用于通过接收由分裂棱镜（47）分裂的每个返回光束并通过接收来自光盘（2）的返回光束来获取跟踪误差信号来获取聚焦误差信号FE， 的第一衍射光栅（45）分开的正一级光和负一级光。

公开(公告)号：US06987614B2

公开(公告)日：2006-01-17

申请号：US10220922

申请日：2002-01-15

申请人： Norio Fukasawa ,  Junichi Suzuki ,  Tetsu Tanaka ,  Takeshi Kubo

发明人： Norio Fukasawa ,  Junichi Suzuki ,  Tetsu Tanaka ,  Takeshi Kubo

IPC分类号： G02B27/44 ,  G02B5/18

CPC分类号： G11B7/0912 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1381

摘要： This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-first-order light, a second diffraction grating (46) for diffracting the optical path of a return light beam from an optical disc (2), and a split prism (47) arranged at a position where the minus-first-order light diffracted by the second diffraction grating (46) is incident and adapted for splitting the minus-first-order light into a plurality of light beams. It also has a light receiving unit (35) for acquiring a focusing error signal FE by receiving each return light beam split by the split prism (47) and for acquiring a tracking error signal by receiving return light beams from the optical disc (2) of the plus-first-order light and the minus-first-order light split by the first diffraction grating (45).

摘要翻译： 本发明是一种具有复合光学元件（32）的光学拾取装置，该复合光学元件具有第一衍射光栅（45），用于将从光源（31）发射的光束分解为零级光，一级光，以及 负一级光，用于衍射来自光盘（2）的返回光束的光路的第二衍射光栅（46）和布置在负一级光的位置处的分割棱镜（47） 由第二衍射光栅（46）衍射的光入射并适于将负一级光分解为多个光束。 它还具有一个光接收单元（35），用于通过接收由分裂棱镜（47）分裂的每个返回光束并通过接收来自光盘（2）的返回光束来获取跟踪误差信号来获取聚焦误差信号FE， 的第一衍射光栅（45）分开的正一级光和负一级光。