公开(公告)号：US06967916B2

公开(公告)日：2005-11-22

申请号：US09975396

申请日：2001-10-10

申请人： Kousei Sano ,  Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino ,  Katsuhiko Yasuda ,  Akihiro Yasuda

发明人： Kousei Sano ,  Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino ,  Katsuhiko Yasuda ,  Akihiro Yasuda

IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0909 ,  G11B7/131 ,  G11B7/1378 ,  G11B7/13927

摘要： An optical head apparatus capable of stably obtaining a detection signal of spherical aberration even with a high density optical disk. A spherical aberration error signal is obtained by: dividing the returning light from the optical disk into a transmitted light and a diffracted light; reproducing information with the transmitted light having a larger amount of light while dividing the diffracted light having a small amount of light into two regions, i.e., region near the optical axis and a region distant from the optical axis; determining amounts of focus deviation in respective regions as focus error signals; and taking the difference signal therebetween. Thus, it is possible to detect the amount of spherical aberration with the SN ratio of the information reproducing signal kept at high level.

摘要翻译： 即使使用高密度光盘也能够稳定地获得球面像差的检测信号的光学头装置。 通过以下方式获得球面像差误差信号：将来自光盘的返回光分成透射光和衍射光; 将具有较大光量的透射光再现信息，同时将具有少量光的衍射光分成两个区域，即靠近光轴的区域和远离光轴的区域; 确定各个区域中的聚焦偏差量作为聚焦误差信号; 并在其间取差分信号。 因此，可以以保持在高电平的信息再现信号的SN比来检测球面像差的量。

公开(公告)号：US08107346B2

公开(公告)日：2012-01-31

申请号：US11912469

申请日：2006-04-24

申请人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second main region transmitting a second interfering portion; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.

摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二干扰部分的第二主区域; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二​​主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。

公开(公告)号：US06898169B2

公开(公告)日：2005-05-24

申请号：US10235625

申请日：2002-09-04

申请人： Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

发明人： Shin-ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/0055 ,  G11B7/135

CPC分类号： G11B7/094 ,  G11B7/0055 ,  G11B7/0903 ,  G11B2007/0013

摘要： An optical pickup head device includes a diffraction grating for generating zero-order diffracted light and at least first-order diffracted light and provides a tracking error signal with a DPP method. The diffraction grating includes grating patterns with a nonuniform period or phase. The size of the first-order diffracted light converged on an optical recording medium is larger in the direction parallel to a tangent to the track than in the direction perpendicular to the tangent. P1/P0>PW2/PW1 is established, where PW1 represents the power that is required to record information on the optical recording medium, PW2 represents the maximum power that allows information recorded on the optical recording medium to be reproduced without being erased, P0 represents the light amount of the zero-order diffracted light converged on the optical recording medium, and P1 represents the light amount of the at least first-order diffracted light converged on the optical recording medium. This configuration makes it possible to detect a tracking error signal with reduced offset, even if a recordable optical recording medium having two information recording planes is used.

摘要翻译： 光拾取头装置包括用于产生零级衍射光和至少一级衍射光的衍射光栅，并提供具有DPP方法的跟踪误差信号。 衍射光栅包括具有不均匀周期或相位的光栅图案。 会聚在光学记录介质上的一级衍射光的尺寸在平行于轨道的切线的方向上大于在垂直于切线的方向上的尺寸。 P 1 / P 0> PW 2 / PW 1，其中PW 1表示在光学记录介质上记录信息所需的功率，PW 2表示允许记录在光学记录介质上的信息被再现的最大功率 不被擦除，P 0表示会聚在光记录介质上的零级衍射光的光量，P 1表示会聚在光记录介质上的至少一级衍射光的光量。 该配置使得即使使用具有两个信息记录平面的可记录光学记录介质，也可以检测具有减小的偏移的跟踪误差信号。

公开(公告)号：USRE42825E1

公开(公告)日：2011-10-11

申请号：US11805282

申请日：2007-05-22

申请人： Shin-Ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

发明人： Shin-Ichi Kadowaki ,  Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0055 ,  G11B7/0903 ,  G11B2007/0013

摘要： An optical pickup head device includes a diffraction grating for generating zero-order diffracted light and at least first-order diffracted light and provides a tracking error signal with a DPP method. The diffraction grating includes grating patterns with a nonuniform period or phase. The size of the first-order diffracted light converged on an optical recording medium is larger in the direction parallel to a tangent to the track than in the direction perpendicular to the tangent. P1/P0>PW2/PW1 is established, where PW1 represents the power that is required to record information on the optical recording medium, PW2 represents the maximum power that allows information recorded on the optical recording medium to be reproduced without being erased, P0 represents the light amount of the zero-order diffracted light converged on the optical recording medium, and P1 represents the light amount of the at least first-order diffracted light converged on the optical recording medium. This configuration makes it possible to detect a tracking error signal with reduced offset, even if a recordable optical recording medium having two information recording planes is used.

摘要翻译： 光拾取头装置包括用于产生零级衍射光和至少一级衍射光的衍射光栅，并提供具有DPP方法的跟踪误差信号。 衍射光栅包括具有不均匀周期或相位的光栅图案。 会聚在光学记录介质上的一级衍射光的尺寸在平行于轨道的切线的方向上大于在垂直于切线的方向上的尺寸。 P1 / P0> PW2 / PW1，其中PW1表示在光学记录介质上记录信息所需的功率，PW2表示允许记录在光学记录介质上的信息被再现而不被擦除的最大功率，P0表示 零级衍射光的光量会聚在光学记录介质上，P1表示会聚在光学记录介质上的至少一级衍射光的光量。 该配置使得即使使用具有两个信息记录平面的可记录光学记录介质，也可以检测具有减小的偏移的跟踪误差信号。

公开(公告)号：US20090028035A1

公开(公告)日：2009-01-29

申请号：US11912469

申请日：2006-04-24

申请人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

IPC分类号： G11B7/135

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second interfering portion transmitting a second main region; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.

摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二主区域的第二干扰部分; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二​​主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。

公开(公告)号：US07034980B2

公开(公告)日：2006-04-25

申请号：US11203914

申请日：2005-08-15

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G02F1/03 ,  G02F1/01 ,  G02F1/00 ,  G02F1/13 ,  G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。

公开(公告)号：US20050135206A1

公开(公告)日：2005-06-23

申请号：US11031634

申请日：2005-01-07

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G02F1/00 ,  G11B7/00 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。

公开(公告)号：US07580327B2

公开(公告)日：2009-08-25

申请号：US12002380

申请日：2007-12-17

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。

公开(公告)号：US07352664B2

公开(公告)日：2008-04-01

申请号：US11031634

申请日：2005-01-07

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

公开(公告)号：US20060028927A1

公开(公告)日：2006-02-09

申请号：US11238272

申请日：2005-09-29

申请人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

发明人： Hidenori Wada ,  Tetsuo Saimi ,  Daisuke Ogata ,  Seiji Nishino ,  Hiroaki Yamamoto ,  Shin-ichi Kadowaki ,  Yoshiaki Komma

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G02F2203/18 ,  G11B7/0948 ,  G11B7/1369 ,  G11B7/13927 ,  G11B2007/0013

摘要： The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element. The invention also presents a novel optical recording/reproducing apparatus and optical recording/reproducing method. The optical element, includes a first voltage application electrode 13, a first opposing electrode 17 arranged in opposition to the first voltage application electrode 13, and a first phase changing layer 15 arranged between the first voltage application electrode 13 and the first opposing electrode 17. By changing a voltage between the first voltage application electrode 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15.

摘要翻译： 本发明提供了一种光学元件，通过该光学元件可以配置光学头，其中当物镜移动时，校正效果几乎没有劣化，以及使用这种光学元件的光学头和光学记录/再现装置。 本发明还提出了一种新颖的光学记录/再现装置和光学记录/再现方法。 光学元件包括第一电压施加电极13，与第一电压施加电极13相对布置的第一相对电极17和布置在第一施加电极13和第一相对电极17之间的第一相变层15。 通过改变第一电压施加电极13和第一相对电极17之间的电压，将入射到第一相变层15上的光转换成球面波的相位。