公开(公告)号：US5283771A

公开(公告)日：1994-02-01

申请号：US666768

申请日：1991-03-08

申请人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

发明人： Shinichi Kadowaki ,  Yoshiaki Komma ,  Seiji Nishino

IPC分类号： G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  H01L31/12 ,  H01S5/00

CPC分类号： G11B7/131 ,  G11B7/123 ,  G11B7/1353

摘要： In an optical pickup head, a light source emits a light beam. A first reflecting section reflects the light beam emitted from the light source and changes a direction of a travel of the light beam emitted from the light source. A second reflecting section reflects the light beam and changes a direction of a travel of the light beam after the light beam is reflected by the first reflecting section. The light beam reflected by the second reflecting section is focused on the optical recording medium. The light beam is reflected and diffracted by the optical recording medium. The light beam reflected and diffracted by the optical recording medium is detected. A common support member is formed with both the first and second reflecting sections.

摘要翻译： 在光拾取头中，光源发射光束。 第一反射部分反射从光源发射的光束并改变从光源发射的光束的行进方向。 第二反射部分反射光束并且在光束被第一反射部分反射之后改变光束的行进方向。 由第二反射部反射的光束聚焦在光记录介质上。 光束被光学记录介质反射和衍射。 检测由光记录介质反射和衍射的光束。 共同的支撑构件与第一和第二反射部分形成。

公开(公告)号：US07787347B2

公开(公告)日：2010-08-31

申请号：US11918426

申请日：2006-04-10

申请人： Tatsuo Itoh ,  Teruhiro Shiono ,  Seiji Nishino

发明人： Tatsuo Itoh ,  Teruhiro Shiono ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/0938 ,  G11B7/123 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A laser beam 32 reflected by an information layer of a multilayer optical disc 26 is reflected and split by reflecting surfaces 31a′, 31b, 31c and 31d to be incident on a photodetector element 36 as laser beams 33, 34 and 35. The laser beam 34 is collected on a light receiving region 38 for RF detection to generate an RF signal. The laser beams 33, 35 are incident on light receiving regions 37a, 37b for focus detection, and a focus error signal is generated by an SSD method. A laser beam 65 reflected by an information layer adjacent to the above information layer partially transmits through the reflecting surface 31a′ to be imaged on a light receiving region 66 for tracking detection, and a tracking error signal is generated.

摘要翻译： 由多层光盘26的信息层反射的激光束32被作为激光束33,34,35的入射到光电检测元件36的反射面31a'，31b，31c，31d反射并分割。激光束 34被收集在用于RF检测的光接收区域38上以产生RF信号。 激光束33,35入射到受光区域37a，37b上进行焦点检测，通过SSD方法产生聚焦误差信号。 由与上述信息层相邻的信息层反射的激光束65通过反射面31a'进行部分透射，以被成像在用于跟踪检测的光接收区域66上，并产生跟踪误差信号。

公开(公告)号：US07333405B2

公开(公告)日：2008-02-19

申请号：US11386376

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

摘要翻译： 光盘装置具有光学拾取器，该光学拾取器包括会聚光学系统，该会聚光学系统具有用于会聚从激光光源发射的光束以在光盘上形成微点的物镜，以及用于控制球面像差的像差校正光学系统 并且对具有至少第一记录层和第二记录层的多层光盘执行信息记录或再现。 在光盘装置中，将微球的聚焦位置从第一层移动到第二层的操作之前开始将球面像差的校正量从适合于第一记录层的值改变到预定值的操作 层完成。 这允许在已经执行球面像差校正的状态下相对于第二记录层稳定地执行聚焦控制，从而防止聚焦控制由于不成功的层间跳跃而失败。

公开(公告)号：US07330419B2

公开(公告)日：2008-02-12

申请号：US11443751

申请日：2006-05-31

申请人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

发明人： Seiji Nishino ,  Hidenori Wada ,  Yoshiaki Komma ,  Sadao Mizuno ,  Keiichi Matsuzaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1398 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1372 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925

摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

摘要翻译： 光头装置包括聚焦光学系统，用于将从半导体激光光源发射的激光束聚焦在具有物镜的光信息介质上。 在半导体激光光源和光信息介质之间设置用于校正物镜中出现的色像差的色像差校正元件。 提供透光率随着距离物镜的孔径表面的中心的距离而增加的光分布校正元件，以便校正入射到物镜的孔表面上的光的强度的降低，距离 从孔表面的中心。

公开(公告)号：US20060233072A1

公开(公告)日：2006-10-19

申请号：US11451779

申请日：2006-06-13

申请人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Hidenori Wada ,  Seiji Nishino

发明人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1369 ,  G11B7/13922

摘要： An optical head with excellent optical characteristics even when using a light source that substantially has a wavelength broadening is provided. The optical head includes a light source, an objective lens for focusing a light beam emitted from the light source on an information recording medium and a photodetector for detecting the light beam reflected from the information recording medium, wherein defocusing correction means and spherical aberration correction means are provided in an optical path between the light source and the information recording medium. Since both the defocusing correction means and the spherical aberration correction means are provided, while defocusing of a focused spot on the information recording medium caused by a wavelength broadening of the light source and chromatic aberration of the optical system can be corrected, the spherical aberration of the optical system caused by wavelength difference between a design wavelength and an incident wavelength also can be corrected. As a result, excellent optical characteristics can be obtained.

摘要翻译： 提供即使在使用基本上具有波长变宽的光源的情况下也具有优异的光学特性的光学头。 光头包括光源，用于将从光源发射的光束聚焦在信息记录介质上的物镜和用于检测从信息记录介质反射的光束的光电检测器，其中散焦校正装置和球面像差校正装置 设置在光源和信息记录介质之间的光路中。 由于设置了散焦校正装置和球面像差校正装置两者，所以可以校正由光源的波长变宽和光学系统的色差引起的信息记录介质上的聚焦点的散焦， 也可以校正由设计波长和入射波长之间的波长差引起的光学系统。 结果，可以获得优异的光学特性。

公开(公告)号：US20060181985A1

公开(公告)日：2006-08-17

申请号：US11386381

申请日：2006-03-22

申请人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/08511 ,  G11B7/1378 ,  G11B7/13925 ,  G11B7/13927 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

公开(公告)号：US07085203B2

公开(公告)日：2006-08-01

申请号：US09794434

申请日：2001-02-27

申请人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Hidenori Wada ,  Seiji Nishino

发明人： Teruhiro Shiono ,  Keiichi Matsuzaki ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1369 ,  G11B7/13922

摘要： An optical head with excellent optical characteristics even when using a light source that substantially has a wavelength broadening is provided. The optical head includes a light source, an objective lens for focusing a light beam emitted from the light source on an information recording medium and a photodetector for detecting the light beam reflected from the information recording medium, wherein defocusing correction means and spherical aberration correction means are provided in an optical path between the light source and the information recording medium. Since both the defocusing correction means and the spherical aberration correction means are provided, while defocusing of a focused spot on the information recording medium caused by a wavelength broadening of the light source and chromatic aberration of the optical system can be corrected, the spherical aberration of the optical system caused by wavelength difference between a design wavelength and an incident wavelength also can be corrected. As a result, excellent optical characteristics can be obtained.

摘要翻译： 提供即使在使用基本上具有波长变宽的光源的情况下也具有优异的光学特性的光学头。 光头包括光源，用于将从光源发射的光束聚焦在信息记录介质上的物镜和用于检测从信息记录介质反射的光束的光电检测器，其中散焦校正装置和球面像差校正装置 设置在光源和信息记录介质之间的光路中。 由于提供了散焦校正装置和球面像差校正装置两者，所以可以校正由光源的波长变宽和光学系统的色差引起的信息记录介质上的聚焦点的散焦， 也可以校正由设计波长和入射波长之间的波长差引起的光学系统。 结果，可以获得优异的光学特性。

公开(公告)号：US5412631A

公开(公告)日：1995-05-02

申请号：US87439

申请日：1993-07-08

申请人： Yoshiaki Komma ,  Seiji Nishino ,  Makoto Kato

发明人： Yoshiaki Komma ,  Seiji Nishino ,  Makoto Kato

IPC分类号： G11B7/13 ,  G11B7/135

CPC分类号： G11B7/131 ,  G11B7/1353

摘要： An optical head apparatus consists of a light beam source, a blazed hologram partitioned into diffraction regions for mainly changing the light beam radiated from the light beam source to zero-order diffraction light and secondarily diffracting the light beam to produce beams of unnecessary light such as N-order diffraction light (N.noteq.0), an information medium for storing information, an objective lens for converging the zero-order diffraction light and the unnecessary light at the information medium, and a six-division photo detector having six detecting sections for detecting intensity of first-order diffraction light produced by diffracting the zero-order diffraction light in the blazed hologram. A hologram pattern of the blazed hologram is formed to function as a lens for the unnecessary light. A focus servo signal is produced according to mutual relation among intensities of the first-order diffraction light detected in the six detecting sections to focus the objective lens on the information medium For the zero-order diffraction light. Therefore, the objective lens is not focused on the information medium for the unnecessary light. Also, the beams of the unnecessary light diffracted in each of the diffraction regions of the blazed hologram are greatly widened because numerical apertures of the diffraction regions are small.

摘要翻译： 光头装置由光束源，闪耀的全息图分割成衍射区域，用于主要将从光束源辐射的光束改变为零级衍射光，并且二次衍射光束以产生不必要的光束，例如 N阶衍射光（N NOTEQUAL 0），用于存储信息的信息介质，用于会聚零级衍射光的物镜和信息介质上的不必要光;以及六分光电检测器，具有六个检测部分，用于 检测在闪耀的全息图中衍射零级衍射光产生的一级衍射光的强度。 闪耀全息图的全息图形成为不必要的光的透镜。 根据在六个检测部分中检测到的一级衍射光的强度之间的相互关系产生聚焦伺服信号，以将物镜聚焦在信息介质上用于零级衍射光。 因此，物镜不会聚焦在不需要的光的信息介质上。 此外，由于衍射区域的数值孔径小，所以在闪耀的全息图的每个衍射区域中衍射的不需要的光束被大大地加宽。

公开(公告)号：US5400311A

公开(公告)日：1995-03-21

申请号：US19537

申请日：1993-02-18

申请人： Yoshiaki Komma ,  Seiji Nishino

发明人： Yoshiaki Komma ,  Seiji Nishino

IPC分类号： G02B5/18 ,  G02B5/32 ,  G03H1/02 ,  G03H1/22 ,  G11B7/09 ,  G11B7/135

CPC分类号： G03H1/02 ,  G02B5/1876 ,  G02B5/188 ,  G02B5/32 ,  G11B7/1353 ,  G03H2240/42 ,  G03H2260/63

摘要： An optical pickup apparatus in which light from a light source is led to an information medium and reflected light from the information medium is led to a hologram to be incident as a +1st order diffraction beam on a photodetector to obtain information signals. The hologram has a stair-like cross-sectional configuration, and a ratio of the width of a step of the stair-like cross-sectional configuration relative to a grating pitch of the hologram is arranged to vary in accordance with a position within a surface of the hologram.

摘要翻译： 一种光拾取装置，其中来自光源的光被引导到信息介质并且来自信息介质的反射光被引导到作为+ 1级衍射光束入射的全息图，以在光电检测器上获得信息信号。 全息图具有阶梯状横截面构造，并且台阶状横截面构造的阶梯宽度相对于全息图的光栅间距的比率被布置为根据表面内的位置而变化 的全息图。

公开(公告)号：US4788561A

公开(公告)日：1988-11-29

申请号：US177901

申请日：1988-04-01

申请人： Seiji Nishino ,  Yuzo Takada

发明人： Seiji Nishino ,  Yuzo Takada

IPC分类号： G11B7/24 ,  B41M5/26 ,  G11B7/243 ,  G11B7/257 ,  G11B7/26 ,  G01D15/34

CPC分类号： G11B7/266 ,  G11B7/243 ,  G11B7/257 ,  G11B2007/24316 ,  G11B7/00454

摘要： The invention relates to an optical recording carrier wherein a recording laser beam or the like is focused onto a recording material so that information signals are recorded thereon. It is one aspect of this invention to provide an optical recording carrier wherein a single Te element crystal layer having a thickness of 50 to 300 .ANG. is formed between a substrate and an optical recording layer containing Te or TeOx (0

摘要翻译： 本发明涉及一种光记录载体，其中记录激光束等聚焦在记录材料上，以便在其上记录信息信号。 本发明的一个方面是提供一种光学记录载体，其中在基片和含有Te或TeO x（0