公开(公告)号：US06584058B1

公开(公告)日：2003-06-24

申请号：US09478760

申请日：2000-01-06

申请人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Tatsuo Uchida

发明人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Tatsuo Uchida

IPC分类号： G11B7135

CPC分类号： G11B7/1369 ,  G02F1/13471 ,  G11B7/13925 ,  G11B2007/0013

摘要： There are disclosed an optical storage device for accessing an optical recording medium such as a phase change type of optical disk and an optical magnetic disk, and a liquid crystal device preferably applicable to such a optical storage device. The liquid crystal device has a structure that two liquid crystal layers, each of which has stripe-like shaped electrodes arranged in a direction perpendicularly intersecting one another, are superposed. This structure makes it possible to effectively correct an aberration caused by a change in a depth from a surface of an optical recording medium to a condensing point, for example, in cases of unevenness in thickness of a protective layer and a multi-layer recording.

摘要翻译： 公开了一种用于访问诸如相变型光盘和光磁盘的光记录介质的光存储装置，以及优选适用于这种光存储装置的液晶装置。 液晶装置具有两个液晶层，每个液晶层具有沿彼此垂直相交的方向排列的条状形状的电极。 这种结构使得可以有效地校正由光记录介质的表面到聚光点的深度变化引起的像差，例如在保护层的厚度不均匀和多层记录的情况下。

公开(公告)号：US06778485B2

公开(公告)日：2004-08-17

申请号：US10346464

申请日：2003-01-17

申请人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Tatsuo Uchida

发明人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Tatsuo Uchida

IPC分类号： G11B7135

CPC分类号： G11B7/1369 ,  G02F1/13471 ,  G11B7/13925 ,  G11B2007/0013

摘要： There are disclosed an optical storage device for accessing an optical recording medium such as a phase change type of optical disk and an optical magnetic disk, and a liquid crystal device preferably applicable to such a optical storage device. The liquid crystal device has a structure that two liquid crystal layers, each of which has stripe-like shaped electrodes arranged in a direction perpendicularly intersecting one another, are superposed. This structure makes it possible to effectively correct an aberration caused by a change in a depth from a surface of an optical recording medium to a condensing point, for example, in cases of unevenness in thickness of a protective layer and a multi-layer recording.

摘要翻译： 公开了一种用于访问诸如相变型光盘和光磁盘的光记录介质的光存储装置，以及优选适用于这种光存储装置的液晶装置。 液晶装置具有两个液晶层，每个液晶层具有沿彼此垂直相交的方向排列的条状形状的电极。 这种结构使得可以有效地校正由光记录介质的表面到聚光点的深度变化引起的像差，例如在保护层的厚度不均匀和多层记录的情况下。

公开(公告)号：US5982402A

公开(公告)日：1999-11-09

申请号：US863686

申请日：1997-05-27

申请人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Masato Nakashima ,  Fumio Yamagishi

发明人： Hiroyasu Yoshikawa ,  Shin-ya Hasegawa ,  Masato Nakashima ,  Fumio Yamagishi

IPC分类号： G03G15/01 ,  B41J2/465 ,  B41J2/47 ,  H04N1/047 ,  H04N1/113 ,  H04N1/12 ,  H04N1/50 ,  B41J2/385

CPC分类号： B41J2/465 ,  B41J2/471 ,  H04N1/047 ,  H04N1/504 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04789 ,  H04N2201/04791

摘要： A tandem type color printer, having optical beam scanning units and corresponding photosensitive drums, which detects a positional shift of a scanning locus occurring on a corresponding one of the plurality of photosensitive drums, and automatically corrects the detected positional shift of the scanning locus. A detecting window, in which a beam transmission time varies with a change in the beam scanning position, is provided at each of the start end side and the terminal end side of each of a plurality of beam scanning loci in a mask plate. The mask plate is arranged between the optical beam scanning units and the photosensitive drums, to provide output of a detection signal corresponding to the incident time of the transmission beam resulting from beam scanning by a light source, and thus determines and corrects the direction and the amount of positional shift of the scanning locus.

摘要翻译： 一种具有光束扫描单元和相应的感光鼓的串联型彩色打印机，其检测在多个感光鼓中的相应一个感光鼓上发生的扫描轨迹的位置偏移，并且自动校正检测到的扫描轨迹的位置偏移。 在掩模板中的多个光束扫描轨迹中的每一个的起始端侧和终端侧的每个处设置有检测窗，其中光束透射时间随着光束扫描位置的变化而变化。 掩模板布置在光束扫描单元和感光鼓之间，以提供对应于由光源的光束扫描产生的发射光束的入射时间的检测信号的输出，从而确定和校正方向和 扫描轨迹的位置偏移量。

公开(公告)号：US06888786B2

公开(公告)日：2005-05-03

申请号：US10623979

申请日：2003-07-21

申请人： Nobuhide Aoyama ,  Shin-ya Hasegawa

发明人： Nobuhide Aoyama ,  Shin-ya Hasegawa

IPC分类号： G02B5/30 ,  G11B7/12 ,  G11B7/125 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G02B5/3083 ,  G11B7/123 ,  G11B7/1263 ,  G11B7/1356 ,  G11B7/1359 ,  G11B11/10545

摘要： An optical device including a light source for emitting diverging light, a polarizing beam splitter for transmitting or reflecting the diverging light according to a polarized light component, a collimator lens for converting the diverging light transmitted through the polarizing beam splitter into collimated light, and an objective lens for focusing the collimated light on an object. The optical device further includes an optical element arranged between the collimator lens and the objective lens for producing a phase difference of +90°±15° or −90°±15° between P-polarized light and S-polarized light. The optical element has a principal axis perpendicular or parallel to a plane of incidence of the diverging light on the polarizing beam splitter. For example, the optical element is provided by a quarter-wave plate having an optic axis perpendicular or parallel to the plane of incidence of the diverging light on the polarizing beam splitter.

摘要翻译： 一种光学装置，包括用于发射发散光的光源，用于根据偏振光分量透射或反射发散光的偏振分束器，用于将透射通过偏振分束器的发散光转换成准直光的准直透镜，以及 用于将准直光聚焦在物体上的物镜。 光学装置还包括布置在准直透镜和物镜之间的光学元件，用于在P偏振光和S偏振光之间产生+ 90°±15°或-90°±15°的相位差。 光学元件具有与偏振分束器上的发散光的入射平面垂直或平行的主轴。 例如，光学元件由具有垂直于或平行于偏振分束器上的发散光的入射平面的光轴的四分之一波片提供。

公开(公告)号：US4957336A

公开(公告)日：1990-09-18

申请号：US269412

申请日：1988-11-10

申请人： Shin-ya Hasegawa ,  Masayuki Kato ,  Fumio Yamagishi ,  Hiroyuki Ikeda ,  Takefumi Inagaki

发明人： Shin-ya Hasegawa ,  Masayuki Kato ,  Fumio Yamagishi ,  Hiroyuki Ikeda ,  Takefumi Inagaki

IPC分类号： G02B26/10

CPC分类号： G02B26/106 ,  Y10S359/90

摘要： A high precision laser beam scanner is provided which is able to shape a beam generated by a laser, suppress the influence of jitter of a scanning beam due to mode hopping of a semiconductor laser, and reduce aberration of the scanning beam. A beam source generates a semiconductor laser beam, which is diffracted by a rotary hologram, forming a scanning beam on a surface to be scanned. An aberration correcting stationary hologram is disposed between the beam source and the rotary hologram. The stationary hologram is constructed with an object wave and a reference wave, which interfere on a stationary hologram substrate subject so that an aberration of the scanning beam on the surface to be scanned shall be corrected. The object wave is a spherical wave which has an aberration, a wave length shorter than that of the semiconductor laser beam, and an incident angle which is not vertical but is inclined with respect to the stationary hologram substrate. A method for fabricating the laser beam scanner is also provided.

摘要翻译： 提供了能够对由激光产生的光束进行成形的高精度激光束扫描器，抑制由于半导体激光器的跳跃而导致的扫描光束的抖动的影响，并且减小扫描光束的像差。 光束源产生通过旋转全息图衍射的半导体激光束，在要扫描的表面上形成扫描光束。 像差校正固定全息图设置在光束源和旋转全息图之间。 固定全息图由对象波和参考波构成，其干涉固定的全息图基板对象，使得要扫描的表面上的扫描光束的像差被校正。 对象波是具有像差，波长短于半导体激光束的像差的球面波，并且不是垂直但相对于静止全息图基板倾斜的入射角。 还提供了一种用于制造激光束扫描器的方法。

公开(公告)号：US07106664B2

公开(公告)日：2006-09-12

申请号：US11047185

申请日：2005-01-31

申请人： Shin-ya Hasegawa ,  Fumihiro Tawa

发明人： Shin-ya Hasegawa ,  Fumihiro Tawa

IPC分类号： G11B7/135 ,  G02B1/10

CPC分类号： G11B7/1387 ,  B82Y10/00 ,  G11B7/122

摘要： An optical head including a first dielectric layer having a first refractive index, a pair of second dielectric layers located adjacent to the first dielectric layer on both sides thereof, each of the second dielectric layers having a second refractive index larger than the first refractive index, a pair of third dielectric layers located adjacent to the second dielectric layers, and a pair of fourth dielectric layers located adjacent to the third dielectric layers, each of the fourth dielectric layers having a third refractive index larger than the first refractive index. Light is incident on the optical head in a direction orthogonal to a layering direction of the first to fourth dielectric layers. The first dielectric layer and each of the third dielectric layers have different refractive indices or different thicknesses.

摘要翻译： 一种光头，包括具有第一折射率的第一电介质层和位于其两侧与第一电介质层相邻的一对第二电介质层，每个第二电介质层的第二折射率大于第一折射率， 位于第二电介质层附近的一对第三电介质层和位于第三电介质层附近的一对第四电介质层，每个第四电介质层的第三折射率大于第一折射率。 光在与第一至第四电介质层的分层方向正交的方向上入射到光学头上。 第一电介质层和第三电介质层中的每一个具有不同的折射率或不同的厚度。

公开(公告)号：US06819637B1

公开(公告)日：2004-11-16

申请号：US09660323

申请日：2000-09-12

申请人： Shin-ya Hasegawa ,  Nobuhide Aoyama

发明人： Shin-ya Hasegawa ,  Nobuhide Aoyama

IPC分类号： G11B700

CPC分类号： G11B11/10597 ,  G11B7/0901 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365 ,  G11B11/10543 ,  G11B11/10576

摘要： A magneto-optical disk drive that prevents the track shift signal from overlapping the MO signal, even when the optical head projects a divergent spherical wave onto the beam splitter. This objective is realized by a magneto-optical disk drive that uses an optical head which emits a divergent spherical wave onto a beam splitter surface of a beam splitter. Since the tracking error signal, which is overlapped by the MO signal of the MO detection unit, is synchronous with the tracking signal, a correction circuit is used to overlap the MO signal with the tracking error signal and to eliminate errors caused when the track shift signal overlaps the MO signal.

摘要翻译： 即使当光头将发散的球面波投射到分束器上时，磁光盘驱动器也可防止轨迹偏移信号与MO信号重叠。 该目的通过磁光盘驱动器来实现，该磁光盘驱动器使用在分束器的分束器表面上发射发散的球面波的光学头。 由于与MO检测单元的MO信号重叠的跟踪误差信号与跟踪信号同步，所以使用校正电路将MO信号与跟踪误差信号重叠，并消除当轨道移位时引起的误差 信号与MO信号重叠。

公开(公告)号：US4824191A

公开(公告)日：1989-04-25

申请号：US173050

申请日：1988-03-28

申请人： Masayuki Kato ,  Fumio Yamagishi ,  Shin-ya Hasegawa ,  Hiroyuki Ikeda ,  Takefumi Inagaki

发明人： Masayuki Kato ,  Fumio Yamagishi ,  Shin-ya Hasegawa ,  Hiroyuki Ikeda ,  Takefumi Inagaki

IPC分类号： G02B5/32 ,  G11B7/085 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B7/08547 ,  G11B7/1372

摘要： An optical pickup for reading out information from an information recording media, such as an optical diskette, comprises a light source for irradiating light beam onto an optical diskette, an optical sensor for detecting the light beam reflected at the optical diskette, and an optical system including a wave plate and two hologram lenses. The first hologram lens diffracts the light beam from the light source, and the second hologram lens transmits the same light beam. On the other hand, the second hologram lens diffracts the reflected light beam from the optical diskette toward the optical sensor, and the first hologram lens transmits the same reflected light beam.

摘要翻译： 用于从诸如光盘的信息记录介质读出信息的光学拾取器包括用于将光束照射到光盘上的光源，用于检测在光盘上反射的光束的光学传感器，以及光学系统 包括波片和两个全息图透镜。 第一全息透镜衍射来自光源的光束，第二全息透镜透射相同的光束。 另一方面，第二全息图透镜将来自光盘的反射光衍射到光学传感器，并且第一全息透镜透射相同的反射光束。

公开(公告)号：US07596295B2

公开(公告)日：2009-09-29

申请号：US11455725

申请日：2006-06-20

申请人： Shin-ya Hasegawa

发明人： Shin-ya Hasegawa

IPC分类号： G02B6/10

CPC分类号： G11B5/02 ,  G11B5/314 ,  G11B11/10536 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A magnetic disk device performs magnetic recording by generating a magnetic field using an electric current on a light-irradiated surface of a recording medium. A head unit is formed by laminating an optical film that transmits a light and a metal film through which the electric current flows. A light exposing unit irradiates the light in such a manner that the light is transmitted through the optical film and irradiated on a surface of the recording medium. An electric-current output unit outputs the electric current to the metal film.

摘要翻译： 磁盘装置通过在记录介质的光照射表面上使用电流产生磁场来执行磁记录。 通过层叠透射光的光学膜和电流流过的金属膜来形成头单元。 光曝光单元以这样的方式照射光，使得光透过光学膜并照射在记录介质的表面上。 电流输出单元将电流输出到金属膜。

公开(公告)号：US20050157393A1

公开(公告)日：2005-07-21

申请号：US11047185

申请日：2005-01-31

申请人： Shin-ya Hasegawa ,  Fumihiro Tawa

发明人： Shin-ya Hasegawa ,  Fumihiro Tawa

IPC分类号： G02B1/10 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1387 ,  B82Y10/00 ,  G11B7/122

摘要： An optical head including a first dielectric layer having a first refractive index, a pair of second dielectric layers located adjacent to the first dielectric layer on both sides thereof, each of the second dielectric layers having a second refractive index larger than the first refractive index, a pair of third dielectric layers located adjacent to the second dielectric layers, and a pair of fourth dielectric layers located adjacent to the third dielectric layers, each of the fourth dielectric layers having a third refractive index larger than the first refractive index. Light is incident on the optical head in a direction orthogonal to a layering direction of the first to fourth dielectric layers. The first dielectric layer and each of the third dielectric layers have different refractive indices or different thicknesses.

摘要翻译： 一种光头，包括具有第一折射率的第一电介质层和位于其两侧与第一电介质层相邻的一对第二电介质层，每个第二电介质层的第二折射率大于第一折射率， 位于第二电介质层附近的一对第三电介质层和位于第三电介质层附近的一对第四电介质层，每个第四电介质层的第三折射率大于第一折射率。 光在与第一至第四电介质层的分层方向正交的方向上入射到光学头上。 第一电介质层和第三电介质层中的每一个具有不同的折射率或不同的厚度。