公开(公告)号：US20070064574A1

公开(公告)日：2007-03-22

申请号：US11521664

申请日：2006-09-15

申请人： Yoshiaki Komma ,  Seiji Nishino ,  Hidenori Wada ,  Teruhiro Shiono ,  Sadao Mizuno ,  Hiroshi Shiroiwa

发明人： Yoshiaki Komma ,  Seiji Nishino ,  Hidenori Wada ,  Teruhiro Shiono ,  Sadao Mizuno ,  Hiroshi Shiroiwa

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/1275 ,  G11B2007/0006

摘要： A transmission diffraction grating body including a base material being substantially transparent with respect to wavelength λ1 and having a refractive index n0; another base material being substantially transparent with respect to wavelength λ1 and having a refractive index n1, which is formed on the base material having a refractive index n0; and a relief diffraction grating formed on the base material having a refractive index n1; wherein the refractive indexes n1 and n0 satisfy the relationship: n1>n0. Thus, the base material having a refractive index n1 can be formed of a high refractive index material, and when the depth of grating of the diffraction grating is set so that the diffraction grating diffracts the light with wavelength λ1 and does not diffract the light with wavelength λ2, the depth of grating of the diffraction grating can be made to be shallow, thus preventing the loss of the amount of the light with wavelength λ1. Furthermore, since base materials each having a different refractive index are bonded to each other to form a diffraction grating body, it is possible to minimize the use amount of the relatively expensive material having a high refractive index. Furthermore, since the most of the diffraction grating body can be formed of a material having a low refractive index, it is possible to lower the height of the diffraction index body.

摘要翻译： 透射衍射光栅体，其包括相对于波长λ1基本上透明且具有折射率n 0的基材; 另一种基材相对于波长λ1基本上是透明的，并且具有折射率n 1，其形成在折射率为n 0的基材上; 以及形成在折射率为n 1的基材上的浮雕衍射光栅; 其中折射率n 1和n 0满足关系：n 1> n 0。 因此，具有折射率n 1的基材可以由高折射率材料形成，并且当衍射光栅的光栅的深度被设置为使得衍射光栅衍射具有波长λ1的光并且不衍射 具有波长λ2的光，衍射光栅的光栅深度可以变浅，从而防止波长λ1的光量的损失。 此外，由于各自具有不同折射率的基材彼此结合以形成衍射光栅体，所以可以使具有高折射率的相对昂贵的材料的使用量最小化。 此外，由于衍射光栅体的大部分可以由具有低折射率的材料形成，因此可以降低衍射指数体的高度。

公开(公告)号：US20050152036A1

公开(公告)日：2005-07-14

申请号：US11049232

申请日：2005-02-01

申请人： Teruhiro Shiono ,  Hidenori Wada ,  Seiji Nishino

发明人： Teruhiro Shiono ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G02B5/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1275 ,  G02B5/1871 ,  G11B2007/0006

摘要： A diffractive optical element emits substantially zero order diffracted light when light with a wavelength of 0.35 μm to 0.45 μm is incident and emits substantially first-order diffracted light when light with a wavelength of 0.6 μm to 0.7 μm is incident. The diffractive optical element includes a substrate and a grating portion formed on the substrate. The grating portion has a step-wise cross section with any one of levels selected from four levels, five levels and six levels. The diffractive optical element emits substantially zero-order diffracted light when light with a first wavelength λ1 satisfying the relationship: 0.35 μm≦λ1≦0.45 μm is incident and emits substantially first-order diffracted light when light with a second wavelength λ2 satisfying the relationship: 0.6 μm≦λ2≦0.7 μm is incident.

摘要翻译： 当波长为0.35μm至0.45μm的光入射时，衍射光学元件发射基本为零级的衍射光，并且当入射具有0.6μm至0.7μm波长的光时，发射基本上为一级的衍射光。 衍射光学元件包括基板和形成在基板上的光栅部分。 光栅部分具有从四个级别，五个级别和六个级别中选择的任何一个级别的逐步横截面。 当具有满足以下关系的第一波长λ1的光时，衍射光学元件发射基本为零级的衍射光，即当第二波长λ2的光满足以下条件时，基本上为一级衍射光 关系：0.6 mum <= lambda2 <= 0.7 mum是事件。

公开(公告)号：US06584059B1

公开(公告)日：2003-06-24

申请号：US09501380

申请日：2000-02-09

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

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

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/14 ,  G11B2007/0006

摘要： An information recording and reproducing apparatus in accordance with the present invention has a radiation light source, a collimator turning a light beam emitted from the radiation light source into substantially parallel light, a light beam convergence member focusing the light beam on an information carrier, a light beam polarization-branching member branching the light beam by polarization, a variable wave plate located between the collimator and the light beam convergence member, photo detectors receiving the light beam branched by the light beam polarization-branching member and outputting a current according to an incident light quantity, and an output level judging member judging whether an output of the photo detectors is larger or smaller than a predetermined value. When the photo detectors receive a small light quantity because the information carrier is highly birefringent, the variable wave plate is switched from a ¼ wavelength plate to a zero-wave plate, thus constantly obtaining a stable reproducing signal with an excellent S/N.

摘要翻译： 根据本发明的信息记录和再现装置具有辐射光源，将从辐射光源发射的光束转换成基本平行的光的准直仪，将光束聚焦在信息载体上的光束会聚部件， 光束偏振分支部件通过偏振分支光束，位于准直器和光束会聚部件之间的可变波片，接收由光束偏振分支部件分支的光束的光检测器，并根据 以及判断光电检测器的输出是否大于或小于预定值的输出电平判断部件。 由于信息载体高度双折射，当光电检测器接收到小的光量时，可变波片从1/4波片切换到零波片，从而不断获得具有优异S / N的稳定再现信号。

公开(公告)号：US5502707A

公开(公告)日：1996-03-26

申请号：US339714

申请日：1994-11-14

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 ,  G11B7/00

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：US5495461A

公开(公告)日：1996-02-27

申请号：US932112

申请日：1992-08-19

申请人： Yoshiaki Komma ,  Seiji Nishino ,  Makoto Kato ,  Kaoru Matsuda

发明人： Yoshiaki Komma ,  Seiji Nishino ,  Makoto Kato ,  Kaoru Matsuda

IPC分类号： G02B5/32 ,  G02F1/09 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B11/10545 ,  G11B7/1369 ,  G11B7/1381

摘要： An optical pickup head apparatus comprising: a light source; an imaging optics for receiving a linearly polarized light beam emitted from the light source, and converges it on a small spot on an information medium; photodetector units for receiving the light beam being reflected and diffracted at the information medium and output electric signals corresponding to received light quantities; a liquid crystal hologram consisting of a pair of transparent substrates, a liquid crystal sandwiched therebetween through a pair of transparent electrodes, either of the transparent electrodes being formed with a hologram pattern; and a Faraday rotator for rotating a polarized direction of light beam by 45 degrees in a light path leading from the light source to the information medium and, further, rotates the polarized direction of the light beam by 45 degrees in its opposite light path. The liquid crystal hologram is applied a constant voltage so that the light beam reflected at the information medium is diffracted in the liquid crystal hologram to generate .+-.1-order diffraction light beams, and the photodetector units sense both of light quantities of said .+-.1-order diffraction light beams emitted from the liquid crystal hologram. Then, a subtraction between signals representing the light quantities is calculated so as to obtain an information signal.

摘要翻译： 一种光学拾取头装置，包括：光源; 用于接收从光源发射的线偏振光束并将其会聚在信息介质上的小点上的成像光学器件; 用于接收光束的光电检测器单元在信息介质处被反射和衍射并输出对应于接收光量的电信号; 由一对透明基板构成的液晶全息图，通过一对透明电极夹在其间的液晶，透明电极中的任一方形成全息图图案; 以及用于在从光源引导到信息介质的光路中使光束的偏振方向旋转45度的法拉第旋转器，并且进一步使光束的偏振方向在相反的光路中旋转45度。 施加恒定电压，使得在信息介质中反射的光束在液晶全息图中被衍射以产生+/- 1级衍射光束，并且光电检测器单元检测所述+ 从液晶全息图发射的-1级衍射光束。 然后，计算表示光量的信号之间的减法，以获得信息信号。

公开(公告)号：US4770923A

公开(公告)日：1988-09-13

申请号：US800042

申请日：1985-11-20

申请人： Kiyotaka Wasa ,  Takashi Hirao ,  Atsuo Nishikawa ,  Seiji Nishino ,  Takeo Ohta

发明人： Kiyotaka Wasa ,  Takashi Hirao ,  Atsuo Nishikawa ,  Seiji Nishino ,  Takeo Ohta

IPC分类号： H01L21/314 ,  G11B5/72 ,  G11B7/24 ,  H01L23/29 ,  H01L23/31 ,  B05D3/06 ,  B32B9/00

CPC分类号： H01L23/3157 ,  G11B5/72 ,  G11B7/2403 ,  H01L23/291 ,  H01L2924/0002 ,  H01L2924/09701 ,  Y10T428/24942 ,  Y10T428/31576 ,  Y10T428/31601 ,  Y10T428/31605

摘要： An inorganic protection film (12) such as of silicon nitride for protecting humidity-sensitive functional devices (16) on the substrate from water molecules (15) is formed on an organic substrate (11) such as one made of polycarbonate plastic material, with a soft buffer interface film (13) between the substrate and the protection film, and the buffer film releases stress due to the difference of thermal expansion coefficients of the organic substrate and the protection film.

摘要翻译： 在诸如由聚碳酸酯塑料材料制成的有机基材（11）上形成诸如氮化硅的无机保护膜（12），其用于在水分子（15）上保护基底上的湿敏功能元件（16） 在衬底和保护膜之间的软缓冲界面膜（13），并且缓冲膜由于有机衬底和保护膜的热膨胀系数的差异而释放应力。

公开(公告)号：US20090052304A1

公开(公告)日：2009-02-26

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： G11B7/135

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：US07283450B2

公开(公告)日：2007-10-16

申请号：US11386126

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：US07268947B2

公开(公告)日：2007-09-11

申请号：US11049232

申请日：2005-02-01

申请人： Teruhiro Shiono ,  Hidenori Wada ,  Seiji Nishino

发明人： Teruhiro Shiono ,  Hidenori Wada ,  Seiji Nishino

IPC分类号： G02B5/18 ,  G11B7/00

CPC分类号： G11B7/1275 ,  G02B5/1871 ,  G11B2007/0006

摘要： A diffractive optical element emits substantially zero order diffracted light when light with a wavelength of 0.35 μm to 0.45 μm is incident and emits substantially first-order diffracted light when light with a wavelength of 0.6 μm to 0.7 μm is incident. The diffractive optical element includes a substrate and a grating portion formed on the substrate. The grating portion has a step-wise cross section with any one of levels selected from four levels, five levels and six levels. The diffractive optical element emits substantially zero-order diffracted light when light with a first wavelength λ1 satisfying the relationship: 0.35 μm≦λ1≦0.45 μm is incident and emits substantially first-order diffracted light when light with a second wavelength λ2 satisfying the relationship: 0.6 μm≦λ2≦0.7 μm is incident.

摘要翻译： 当波长为0.35μm至0.45μm的光入射时，衍射光学元件发射基本为零级的衍射光，并且当入射具有0.6μm至0.7μm波长的光时，发射基本上为一级的衍射光。 衍射光学元件包括基板和形成在基板上的光栅部分。 光栅部分具有从四个级别，五个级别和六个级别中选择的任何一个级别的逐步横截面。 当具有满足以下关系的第一波长λ1的光时，衍射光学元件发射基本为零级的衍射光，即当第二波长λ2的光满足以下条件时，基本上为一级衍射光 关系：0.6 mum <= lambda2 <= 0.7 mum是事件。

公开(公告)号：US20060215505A1

公开(公告)日：2006-09-28

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.