公开(公告)号：US06480454B1

公开(公告)日：2002-11-12

申请号：US09460128

申请日：1999-12-13

申请人： Hidenori Wada ,  Daisuke Ogata ,  Sadao Mizuno ,  Seiji Nishino ,  Tetsuo Saimi

发明人： Hidenori Wada ,  Daisuke Ogata ,  Sadao Mizuno ,  Seiji Nishino ,  Tetsuo Saimi

IPC分类号： G11B700

CPC分类号： G11B7/13925 ,  G02F1/13306 ,  G02F1/133502 ,  G02F1/134309 ,  G02F1/13439 ,  G02F2203/18 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1369

摘要： The invention presents an optical element that has a good correcting effect with regard to aberrations and is easy to manufacture, as well as an optical head and an optical recording and reproducing apparatus using the same. The optical element includes a first substrate, a second substrate arranged substantially in parallel to the first substrate, a voltage applying electrode arranged between the first substrate and a liquid crystal, an opposing electrode arranged substantially in parallel to the voltage applying electrode and opposing the voltage applying electrode, and a liquid crystal arranged between the first substrate and the second substrate. By changing the voltage between the voltage applying electrode and the opposing electrode, the phase of the light incident on the liquid crystal can be changed.

摘要翻译： 本发明提供一种光学元件，其具有关于像差的良好校正效果并且易于制造，以及光学头和使用该光学元件的光学记录和再现装置。 光学元件包括第一基板，基本上平行于第一基板布置的第二基板，布置在第一基板和液晶之间的电压施加电极，基本上平行于电压施加电极布置的对置电极， 施加电极和布置在第一基板和第二基板之间的液晶。 通过改变施加电压和对置电极之间的电压，可以改变入射在液晶上的光的相位。

公开(公告)号：US06414930B1

公开(公告)日：2002-07-02

申请号：US09366625

申请日：1999-08-03

申请人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Tetsuo Saimi

发明人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Tetsuo Saimi

IPC分类号： G11B712

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1359 ,  G11B7/1362 ,  G11B7/13922 ,  G11B2007/0006

摘要： To provide a thin optical head including a diffractive optical element 5 and refractive optical element 9 having an optical plane into which the optical axis of light 2 emitted from a light source 1 diagonally comes in the optical path between the light source 1 and an information recording medium 11 and constituted so that the change of diffraction angles of the diffracted light emitted from the diffractive optical element 5 due to the wavelength fluctuation of the emitted light 2 and the change of refraction angles of the refracted light emitted from the refractive optical element 9 are produced so as to be canceled.

摘要翻译： 提供一种包括衍射光学元件5和具有光学平面的折射光学元件9的光学头，该光学元件9从光源1发射的光2的光轴对角地入射到光源1和信息记录之间的光路中 介质11，构成为由衍射光学元件5发射的衍射光的衍射角的变化由于发射光2的波长波动和从折射光学元件9发射的折射光的折射角的变化是 产生以被取消。

公开(公告)号：US5757754A

公开(公告)日：1998-05-26

申请号：US495137

申请日：1995-06-28

申请人： Hiroaki Yamamoto ,  Tetsuo Saimi ,  Seiji Nishino ,  Yoshiaki Komma ,  Hidenori Wada

发明人： Hiroaki Yamamoto ,  Tetsuo Saimi ,  Seiji Nishino ,  Yoshiaki Komma ,  Hidenori Wada

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/123 ,  G11B7/0912 ,  G11B7/0916

摘要： A light beam emitted from a semiconductor laser element is collimated by a collimating lens, and is applied to an optical disk through a polarizing holographic beam splitter, a .lambda./4 plate and an objective lens, a light beam reflected by the optical disk is applied to the polarizing holographic beam splitter and is diffracted. Diffracted light beams of +1st order and -1st order are applied to two photodetectors, and a focus error signal is obtained on the basis of the diffracted light beam of +1st order and a tracking error signal is obtained on the basis of the diffracted light beam of -1st order.

摘要翻译： 从半导体激光元件发射的光束被准直透镜准直，并通过偏振全息光束分离器，λ/ 4板和物镜施加到光盘上，施加由光盘反射的光束 到偏振全息分束器并被衍射。 + 1级和-1级的衍射光束被施加到两个光电检测器，并且基于+ 1阶的衍射光束获得聚焦误差信号，并且基于衍射光获得跟踪误差信号 光束为-1阶。

公开(公告)号：US5687153A

公开(公告)日：1997-11-11

申请号：US778508

申请日：1997-01-03

申请人： Yoshiaki Komma ,  Seiji Nishino ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Makoto Kato ,  Tetsuo Saimi

发明人： Yoshiaki Komma ,  Seiji Nishino ,  Shin-ichi Kadowaki ,  Hiroaki Yamamoto ,  Makoto Kato ,  Tetsuo Saimi

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B11/10543 ,  G11B7/12 ,  G11B7/123 ,  G11B7/0912

摘要： An optical head device includes: a light source for emitting a light beam; an objective lens for converging the light beam on an information storage medium; a hologram for receiving the light beam reflected by the information storage medium and generating diffracted light from the light beam, the hologram having such a polarization anisotropy that it diffracts light in a second polarization state more strongly than light in a first polarization state which is different from the second polarization state; and a photodetector including a plurality of photodetective sections for receiving a part of the diffracted light and outputting a photocurrent in accordance with the intensity of the part of the diffracted light. The optical head device further include a quarter-wave plate disposed between the objective lens and the hologram for causing the polarization state of the light beam reflected by the information storage medium to be the second polarization state; and the hologram is disposed so that the distance between the hologram and the objective lens is shorter than the distance between the hologram and the photodetector.

摘要翻译： 光头装置包括：用于发射光束的光源; 用于将光束会聚在信息存储介质上的物镜; 用于接收由信息存储介质反射的光束并产生来自光束的衍射光的全息图，该全息图具有这样的偏振各向异性，使得它在比第一偏振态不同的光更强烈地衍射具有第二偏振态的光 从第二极化状态; 以及光电检测器，其包括多个光电检测部分，用于接收一部分衍射光并根据部分衍射光的强度输出光电流。 光头装置还包括设置在物镜和全息图之间的四分之一波片，用于使由信息存储介质反射的光束的偏振状态成为第二偏振状态; 并且全息图被设置成使得全息图和物镜之间的距离比全息图和光电检测器之间的距离短。

公开(公告)号：US5640380A

公开(公告)日：1997-06-17

申请号：US510564

申请日：1995-08-02

申请人： Tetsuo Saimi ,  Yasuo Nishihara ,  Masatoshi Yajima

发明人： Tetsuo Saimi ,  Yasuo Nishihara ,  Masatoshi Yajima

IPC分类号： G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1362 ,  G11B7/123 ,  G11B7/126 ,  G11B7/1365

摘要： Optical-beam 2 emitted from semiconductor laser device 1 is transformed into parallel-light 4 by means of collimator lens 3, and a part of parallel-light 4 passed through parallel glass-plate 7 of which the front-surface is mirror finished and the rear-surface is frost finished is inputted into detector 5 monitoring the light-quantity. The optical-beam reflected from parallel glass-plate 7 is focused on information medium 9 after it passed through a collimator-lens 6. The optical-beam reflected from information medium 9 is then introduced on a detector disposed on the semiconductor laser device taking an reversed course. Since no interference of light transmitted through detector 5 is generated in this optical head, a higher linearity of the output of detector 5 can be obtained so that the better stabilized output control of semiconductor laser device 1 by means of laser control circuit 11 can be obtained.

摘要翻译： 从半导体激光装置1发射的光束2通过准直透镜3变换成平行光4，并且平行光4的一部分通过平行玻璃板7，其前表面被镜面加工， 后表面霜冻完成输入检测器5监测光量。 从平行玻璃板7反射的光束在通过准直透镜6之后聚焦在信息介质9.然后，将从信息介质9反射的光束引入到设置在半导体激光装置上的检测器上， 反转过程。 由于在该光头中不产生透过检测器5的光的干涉，所以能够获得检测器5的输出的较高的线性度，从而能够获得通过激光控制电路11对半导体激光装置1进行更稳定的输出控制 。

公开(公告)号：US5315574A

公开(公告)日：1994-05-24

申请号：US120869

申请日：1993-09-15

申请人： Tetsuo Saimi ,  Kazuo Momoo ,  Makoto Kato

发明人： Tetsuo Saimi ,  Kazuo Momoo ,  Makoto Kato

IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B11/10545 ,  G11B7/0912

摘要： An optical head with a polarized beam hologram for optically recording and reproducing information on and from a recording medium. The optical head comprises an optical lens for converging a light beam emitted from a light source on the recording medium and a beam splitter provided between the light source and the optical lens for branching a light beam reflected from the recording medium. Also included in the optical head is a polarization type hologram for causing transmission or reflection of the light beam branched by the beam splitter and for polarizing the light beam so that a 0 order light and a + first-order diffracted light produced due to the polarization are cross polarized with respect to each other and the 0 order light and a - first-order diffracted light produced due to the polarization are cross polarized with respect to each other. The 0 order light, the + first-order diffracted light and the - first-order diffracted light from the hologram are respectively received by photodetectors.

摘要翻译： 一种具有偏振光束全息图的光学头，用于在记录介质上光学记录和再现信息。 光头包括用于会聚来自记录介质上的光源的光束的光学透镜和设置在光源和光学透镜之间的分束器，用于分支从记录介质反射的光束。 还包括在光学头中的是偏振型全息图，用于使由分束器分支的光束的透射或反射并且用于使光束偏振，使得由于偏振产生0级光和+ 1级衍射光 相对于彼此是交叉极化的，并且由于偏振而产生的0级光和一级衍射光相对于彼此是交叉极化的。 来自全息图的0级光，+一级衍射光和一级衍射光分别被光检测器接收。

公开(公告)号：US5151889A

公开(公告)日：1992-09-29

申请号：US467119

申请日：1990-01-19

申请人： Tetsuo Saimi ,  Kazuo Momoo

发明人： Tetsuo Saimi ,  Kazuo Momoo

IPC分类号： G11B7/12 ,  G11B7/13

CPC分类号： G11B7/13 ,  G11B7/12

摘要： An optical head system for optically recording and reproducing information on and from an optical recording medium. The optical head system comprises a light source for emitting a light beam, a collimator lens for causing the light beam from the light source means to become a parallel light beam, and an objective lens for converging the parallel light beam from the collimator lens on the optical recording medium. Between said collimator lens and the objective lens is provided a first optical device for reflecting the light beam returning from the optical recording medium. Also included is a second optical device for separating the light beam from the first optical device to generate two light beams, the two separated light beams directing in the substantially same direction and being separated by a predetermined distance from each other. The two separated light beams from said second optical device are separately incident on a photodetector assembly. The photodetector assembly comprises first and second light-receiving portions which are placed on a common substrate. One of the two separated light beam is incident on the first light-receiving portion so as to obtain a focus error signal and the other separated light beam is incident on the second light-receiving portion so as to obtain a tracking error signal.

摘要翻译： 一种用于在光学记录介质上光学记录和再现信息的光学头系统。 光头系统包括用于发射光束的光源，用于使来自光源装置的光束成为平行光束的准直透镜，以及用于将来自准直透镜的平行光束会聚在物镜 光记录介质。 在所述准直透镜和物镜之间设置有用于反射从光记录介质返回的光束的第一光学装置。 还包括用于分离来自第一光学装置的光束以产生两个光束的第二光学装置，两个分离的光束以基本上相同的方向引导并且彼此分开预定的距离。 来自所述第二光学装置的两个分开的光束分别入射到光电检测器组件上。 光电检测器组件包括放置在公共基板上的第一和第二光接收部分。 两个分离的光束中的一个入射在第一光接收部分上，以获得聚焦误差信号，另一个分离的光束入射到第二光接收部分上，以便获得跟踪误差信号。

公开(公告)号：US07170664B2

公开(公告)日：2007-01-30

申请号：US11204270

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：US20060023607A1

公开(公告)日：2006-02-02

申请号：US11238621

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.

公开(公告)号：US20050286385A1

公开(公告)日：2005-12-29

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： G02F1/00 ,  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。