公开(公告)号：US07406005B2

公开(公告)日：2008-07-29

申请号：US10915091

申请日：2004-08-10

申请人： Shinya Hasegawa

发明人： Shinya Hasegawa

IPC分类号： G11B11/00 ,  G11B7/24

CPC分类号： G11B7/24079 ,  G11B5/314 ,  G11B7/12 ,  G11B7/1387 ,  G11B7/14 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24076 ,  G11B11/10532 ,  G11B11/10584 ,  G11B2005/0005 ,  G11B2005/0021

摘要： An optical recording medium having at least a recording film and a protection film disposed on a substrate is disclosed. The optical recording medium includes a plurality of recording tracks being disposed, along a predetermined direction, on a signal recording surface to which a laser beam is incident, the recording tracks having tapered protruding portions, wherein the protruding portions are formed of an optical near field generation film.

摘要翻译： 公开了一种至少具有记录膜和设置在基板上的保护膜的光学记录介质。 光记录介质包括沿着预定方向在激光束入射的信号记录表面上设置的多个记录磁道，记录磁道具有锥形突出部分，其中突出部分由光学近场形成 一代电影。

公开(公告)号：US20070188922A1

公开(公告)日：2007-08-16

申请号：US11442061

申请日：2006-05-26

申请人： Fumihiro Tawa ,  Shinya Hasegawa

发明人： Fumihiro Tawa ,  Shinya Hasegawa

IPC分类号： G11B5/00

CPC分类号： G11B5/02 ,  G01Q80/00 ,  G11B5/314 ,  G11B11/10536 ,  G11B2005/0005 ,  G11B2005/0021

摘要： There is provided a magnetic head and an information storage apparatus capable of applying light to a position close to a position to which a magnetic field is applied, without reducing the intensity of the magnetic field. The magnetic head includes a magnetic pole which emits a magnetic flux from an end thereof; an optical pole having an end aligned with the end of the magnetic pole and has a refractive index different from that of the magnetic pole; a light applying section which applies light to a side of the end of the optical pole from a position apart from the optical pole, and a filling section which fills the space between the light applying section and the end of the optical pole and has a refractive index different from any of those of the magnetic pole and optical pole.

摘要翻译： 提供了一种磁头和信息存储装置，其能够将光施加到靠近施加磁场的位置的位置，而不会降低磁场的强度。 磁头包括从其一端发射磁通的磁极; 具有与磁极的端部对准的端部并且具有与磁极的折射率不同的折射率的光学柱; 一个从远离光学杆的位置向光学端的一侧施加光的光施加部分，以及填充部分，其填充光施加部分和光学杆的端部之间的空间，并且具有折射 指数与磁极和光棒中的任何一个不同。

公开(公告)号：US20060269218A1

公开(公告)日：2006-11-30

申请号：US11501257

申请日：2006-08-07

申请人： Shinya Hasegawa ,  Fumihiro Tawa

发明人： Shinya Hasegawa ,  Fumihiro Tawa

IPC分类号： G02B6/00

CPC分类号： G11B5/314 ,  G01Q80/00 ,  G11B7/1387 ,  G11B11/10532 ,  G11B11/10554 ,  G11B2005/0005 ,  G11B2005/0021

摘要： An optical head has a first propagation section made of a first low extinction material and installed along an optical axis, a pair of second propagation sections which, being made of a second low extinction material, sandwich the first propagation section, a pair of first confining sections which, being made of a material with propagation capability lower than that of the second propagation sections, further sandwich the first propagation section and second propagation sections from outside the second propagation sections, and a pair of third propagation sections which, being made of a material with light propagation capability higher than that of the first confining sections, further sandwich the first confining sections from outside. Also, an optical head design apparatus calculates a complex propagation constant along an optical axis by solving an equation which is based on F matrices, and thereby design an optical head in a far-sighted manner.

摘要翻译： 光头具有由第一低消光材料制成并沿着光轴安装的第一传播部分，由第二低消光材料制成的一对第二传播部分夹着第一传播部分，一对第一传播部分 由具有低于第二传播部分的传播能力的材料制成的部分还从第二传播部分的外部进一步夹持第一传播部分和第二传播部分，以及一对第三传播部分，其由 具有比第一限制部分的光传播能力更高的光传播能力的材料，进一步从外部夹住第一限制部分。 此外，光头设计装置通过求解基于F个矩阵的方程来计算沿光轴的复传播常数，从而以远视的方式设计光头。

公开(公告)号：US06639888B1

公开(公告)日：2003-10-28

申请号：US09179632

申请日：1998-10-27

申请人： Shinya Hasegawa

发明人： Shinya Hasegawa

IPC分类号： G11B700

CPC分类号： G11B7/1369 ,  G11B7/1353

摘要： The present invention relates to an information reading and recording device for reading and recording information of an optical signal. The optical system in this information reading and recording device is simplified by using a diffraction optical system. In an information reading and recording device, in which an optical disk is used, including a light source of a semiconductor laser and an image formation lens for condensing beams of light sent from the semiconductor laser so as to form an image on an optical disk medium, a diffraction optical element, the diffraction efficiency of which depends upon a direction of polarization of light, is arranged between the semiconductor lens and the image formation lens, and diffraction light of the diffraction optical element is introduced into a servo detecting optical system. In the case of recording conducted on the disk medium by a laser beam, a transmission factor of the diffraction optical element is made higher than the diffraction efficiency in the case of reading and a transmission factor of the diffraction optical element is made lower than the diffraction efficiency in the case of recording.

摘要翻译： 本发明涉及一种用于读取和记录光信号的信息的信息读取和记录装置。 该信息读取和记录装置中的光学系统通过使用衍射光学系统来简化。 在使用光盘的信息读取和记录装置中，包括半导体激光器的光源和用于聚集从半导体激光器发送的光束的图像形成透镜，以便在光盘介质上形成图像 在半导体透镜和图像形成透镜之间配置衍射光学元件，其衍射效率取决于光的偏振方向，衍射光学元件的衍射光被引入到伺服检测光学系统中。 在通过激光束在盘介质上进行记录的情况下，衍射光学元件的透射系数在读取的情况下高于衍射效率，衍射光学元件的透射系数低于衍射 在录音的情况下的效率。

公开(公告)号：US6115349A

公开(公告)日：2000-09-05

申请号：US329977

申请日：1999-06-10

申请人： Fumihiro Tawa ,  Shinya Hasegawa

发明人： Fumihiro Tawa ,  Shinya Hasegawa

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/125 ,  G11B7/09

CPC分类号： G11B7/127 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup includes a first and second light-emitting elements, a light separating element, and an objective lens. A collimating lens is disposed in the first optical path connecting the first light-emitting element and the light separating element, and an optical element which produces a rotationally symmetrical wavefront aberration is disposed in the second optical path connecting the second light-emitting element and the light separating element. Light is emitted from the first light-emitting element when a thinner disk is used. Light passes through the light separating element and the objective lens to the disk. Light is emitted from the second light-emitting element when a thicker disk is used. Light passes through the light separating element and the objective lens to the disk. In the latter case, the optical element produces aberration to compensate aberration caused by the objective lens so that a small clean spot can be formed.

摘要翻译： 光拾取器包括第一和第二发光元件，光分离元件和物镜。 在连接第一发光元件和光分离元件的第一光路中设置准直透镜，并且在连接第二发光元件和第二发光元件的第二光路中配置产生旋转对称的波前像差的光学元件 光分离元件。 当使用更薄的盘时，从第一发光元件发射光。 光通过光分离元件和物镜到盘。 当使用较厚的盘时，从第二发光元件发射光。 光通过光分离元件和物镜到盘。 在后一种情况下，光学元件产生像差以补偿由物镜引起的像差，从而可以形成小的清洁点。

公开(公告)号：US6091544A

公开(公告)日：2000-07-18

申请号：US847316

申请日：1997-04-23

申请人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

发明人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

IPC分类号： G02B5/32 ,  G02B26/10 ,  G03H1/12 ,  G02B5/18

CPC分类号： G02B5/32 ,  G02B26/106 ,  G03H1/0005

摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of rotatable hologram from a parallel state. These disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof. The light beam scanning apparatus includes at least two holograms with one being fixed and the other rotatable, where a rate of variation of a direction cosine of an object wave recorded on the fixed plate and taken in a scanning direction of the light on the scanning surface is configured to be different from a rate of variation of a direction cosine of the object wave recorded on the fixed plate and taken in a cross scanning direction of the light on the scanning surface, and focal distances of a light incident on said rotatable hologram are configured to be different in the scanning direction and in the cross scanning direction.

摘要翻译： 仅利用大规模生产的全息图的高分辨率光束扫描装置，而不是利用诸如光学透镜或具有曲率的反射镜等辅助光学系统，并且能够补偿包括扫描光束增厚和变化的缺点，可旋转全息图的故障 以恒定速度旋转，由于半导体激光器的波长的模式跳跃而导致的扫描光束位置在扫描方向和横扫描方向上的位移以及可旋转全息图的基底与平行状态的偏离。 这些缺点对于增加全息扫描仪的分辨率并降低其成本的努力是有害的。 光束扫描装置包括至少两个全息图，一个是固定的，另一个是可旋转的，其中记录在固定板上的物体波的方向余弦的变化率在扫描表面上的光的扫描方向上 被配置为不同于记录在固定板上并沿扫描表面上的光的横扫描方向拍摄的物体波的方向余弦变化率，并且入射在所述可旋转全息图上的光的焦距为 被配置为在扫描方向和横扫描方向上不同。

公开(公告)号：US6020984A

公开(公告)日：2000-02-01

申请号：US838987

申请日：1997-04-23

申请人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

发明人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

IPC分类号： G02B5/32 ,  G02B26/10 ,  G03H1/12

CPC分类号： G02B5/32 ,  G02B26/106 ,  G03H1/0005

摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as an optical lens or a mirror having curvature, and capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of a rotatable hologram from a parallel state, which disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof, the light-beam scanning apparatus being characterized in that provided in the rotatable hologram (1) and the fixed plate (2) arediffraction gratings for minimizing:either a sum total of values obtained by weighting:a square of an optical path length difference between a) an optical path of a light flux measured along a principal axis MA of a light beam incident on and diffracted by a diffraction grating (1a) of a rotatable hologram (1), and incident on and diffracted by a diffraction grating (2a) of a fixed plate (2) so as to conduct a scanning and converging on a scanning point k on an image formation surface (4), and b) an optical path of a light flux measured along a marginal ray M1 distanced from the principal axis MA; or an absolute value of the optical path difference thereof,the weighting being conducted at every scanning position covering an entire range of the image formation surface (4),or a sum total of values obtained by weighting:a square of a sum obtained by adding: an amount of displacement of a light beam convergent on a scanning point k on the image formation surface (4), which displacement is measured along the marginal ray M1 distanced from the principal axis MA of an incident reconstructing light flux with respect to the principal axis MA of a phase of the diffraction grating (1a) of the rotatable hologram (1); to an amount of displacement of the same light, which displacement is measured with respect to the principal axis MA of a phase recorded on the diffraction grating (2a) when the light flux is incident on the fixed plate (2); or by weighting an absolute value of the sum,the weighting being conducted at every scanning position covering an entire range of an image formation surface.

公开(公告)号：US5995250A

公开(公告)日：1999-11-30

申请号：US847315

申请日：1997-04-23

申请人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

发明人： Shinya Hasegawa ,  Shigeo Kayashima ,  Satoshi Maeda ,  Hirokazu Aritake

IPC分类号： G02B5/32 ,  G02B26/10 ,  G03H1/12

CPC分类号： G02B5/32 ,  G02B26/106 ,  G03H1/0005

摘要： A method of manufacturing a fixed hologram plate of a light-beam scanning apparatus for diffracting a light incident from a light source portion by a rotatable hologram, scanning by the diffracted light through the rotation of the rotatable hologram, diffracting the resulting light by the fixed hologram plate, and for conducting a light-beam scanning on a scanning surface. The method includes the steps of preparing an interference fringe distribution of the fixed hologram plate by two waves: a first wave having a spherical aberration, a transverse aberration of the first wave is in the Y direction, the transverse wave including an astigmatism and a coma; and a second wave having a spherical aberration and astigmatism, and having a wavelength different from a wavelength of a reconstructing wave that is selected to minimize distortion, wherein a transverse aberration of the second wave is in the X direction.

摘要翻译： 一种制造光束扫描装置的固定全息板的方法，用于通过可旋转的全息图衍射从光源部分入射的光，通过可旋转全息图的旋转被衍射光扫描，将所得到的光衍射成固定的 全息图板，并用于在扫描表面上进行光束扫描。 该方法包括以下步骤：通过两波制备固定全息图板的干涉条纹分布：具有球面像差的第一波，第一波的横向像差在Y方向上，横波包括散光和彗差 ; 以及具有球面像差和像散的第二波，并且具有与被选择为使失真最小化的重构波的波长不同的波长，其中第二波的横向像差处于X方向。

公开(公告)号：US5940195A

公开(公告)日：1999-08-17

申请号：US847317

申请日：1997-04-23

申请人： Shinya Hasegawa ,  Fumio Yamagishi ,  Masato Nakashima

发明人： Shinya Hasegawa ,  Fumio Yamagishi ,  Masato Nakashima

IPC分类号： G02B5/32 ,  G02B26/10 ,  G03H1/12

CPC分类号： G02B5/32 ,  G02B26/106 ,  G03H1/0005

摘要： A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and capable of compensating for disadvantages including scanning beam thickening and variation, failure of a rotatable hologram to rotate at a constant velocity, displacement of a scanning beam position in the scanning direction and the cross scanning direction due to a mode hop of a wavelength of a semiconductor laser, and deviation of a base of rotatable hologram from a parallel state. These disadvantages are detrimental to efforts for increasing the resolution of a hologram scanner and lowering the cost thereof. The light beam scanning apparatus includes at least two holograms with an optical path length difference .DELTA..PHI. along a scanning beam light flux. The path length is measured from a light source to a scanning surface in the first hologram, and is represented by .DELTA..PHI.

摘要翻译： 仅利用大规模生产的全息图的高分辨率光束扫描装置，而不是利用诸如光学透镜或具有曲率的反射镜等辅助光学系统，并且能够补偿包括扫描光束增厚和变化的缺点，可旋转全息图的故障 以恒定速度旋转，由于半导体激光器的波长的模式跳跃而导致的扫描光束位置在扫描方向和横扫描方向上的位移以及可旋转全息图的基底与平行状态的偏离。 这些缺点对于增加全息扫描仪的分辨率并降低其成本的努力是有害的。 光束扫描装置沿扫描光束光束包括至少两个具有光程长度差DELTA PHI的全息图。 路径长度从第一全息图中的光源到扫描面测量，并由DELTA PHI

公开(公告)号：US5786911A

公开(公告)日：1998-07-28

申请号：US555866

申请日：1995-11-13

申请人： Fumihiro Tawa ,  Junji Tomita ,  Shinya Hasegawa

发明人： Fumihiro Tawa ,  Junji Tomita ,  Shinya Hasegawa

IPC分类号： G02B26/10 ,  G02B26/12 ,  G02B27/28 ,  G02B5/32 ,  G02B26/08

CPC分类号： G02B26/123 ,  G02B26/106 ,  G02B27/283

摘要： An optical scanning apparatus is equipped with a light source for outputting a scanning beam having a single fixed direction polarization component. A polarization control element is provided for changing the polarization direction of the scanning beam outputted from the light source. An optical element is provided for splitting the scanning beam outputted from the polarization control element into two linearly polarized beams that orthogonally cross each other. An image formation element is utilized for forming images with the two linearly polarized beams outputted from the optical element at independent locations on a scanning surface. A signal processing device is provided for controlling the light source and the polarization control element, and for switching on and off the two linearly polarized beams.

摘要翻译： 光学扫描装置配备有用于输出具有单个固定方向偏振分量的扫描光束的光源。 偏振控制元件用于改变从光源输出的扫描光束的偏振方向。 提供了一种光学元件，用于将从偏振控制元件输出的扫描光束分成两个彼此正交交叉的线偏振光束。 图像形成元件用于在扫描表面上的独立位置从光学元件输出的两个线性偏振光束形成图像。 提供一种信号处理装置，用于控制光源和偏振控制元件，并用于接通和关断两个线偏振光束。