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1. 发明申请

US20080225673A1 Information recording device and head 审中-公开
标题翻译：信息记录装置和头
公开(公告)号：US20080225673A1
公开(公告)日：2008-09-18
申请号：US12071585
申请日：2008-02-22
申请人： Shinya Hasegawa , Keiji Aruga , Fumihiro Tawa
发明人： Shinya Hasegawa , Keiji Aruga , Fumihiro Tawa
IPC分类号： G11B7/00
CPC分类号： G11B5/314 , G11B5/02 , G11B5/4833 , G11B11/10536 , G11B11/10554 , G11B11/10569 , G11B11/1058 , G11B2005/001 , G11B2005/0021
摘要： In a magnetic recording device, a semiconductor laser (LD) is disposed at a position with a predetermined distance from a swing arm having a slider. The laser beam output from the LD is irradiated, via a beam converter and a mirror, to a spherical aberration lens that generates spherical aberration. The laser beam transmitted through the spherical aberration lens is directed to a light incident opening of the slider at a constant angle (perpendicularly), and then to a position of a recording medium at which information is recorded, thereby performing thermal assist at the magnetic recording time.
摘要翻译：在磁记录装置中，半导体激光器（LD）设置在与具有滑块的摆臂相距预定距离的位置。从LD输出的激光束通过光束转换器和反射镜照射到产生球面像差的球面像差透镜。透过球面像差透镜的激光束以一定的角度（垂直）指向滑块的光入射开口，然后指向记录信息的记录介质的位置，由此在磁记录时进行热辅助时间。

2. 发明授权

US06356395B1 Light intensity distribution converting device and optical data storage apparatus 有权
标题翻译：光强分布转换装置和光数据存储装置
公开(公告)号：US06356395B1
公开(公告)日：2002-03-12
申请号：US09365824
申请日：1999-08-03
申请人： Fumihiro Tawa , Shinya Hasegawa
发明人： Fumihiro Tawa , Shinya Hasegawa
IPC分类号： G02B300
CPC分类号： G02B27/0927 , G02B3/0056 , G02B3/0068 , G02B3/04 , G02B27/09 , G02B27/0955 , G11B7/1374 , G11B7/1376 , G11B7/1378 , G11B7/13922 , G11B7/1398
摘要： A light intensity distribution converting device is formed by a transparent body having a first curved surface, a second curved surface, and an outer circumferential surface extending between the first and second curved surfaces. One of first and second surfaces has a concave surface configuration and the other has a convex surface configuration. Diverging light is made incident to the first curved surface, for example. The light intensity distribution of light made incident to the body from first curved surface is different from that of light emerging the body from the second curved surface, due to refractions at the first and second curved surfaces. The light intensity distribution converting device can be used as a collimator lens or an objective lens in an optical data storing apparatus.
摘要翻译：光强分布转换装置由具有第一弯曲表面，第二弯曲表面和在第一和第二弯曲表面之间延伸的外周表面的透明体形成。第一和第二表面中的一个具有凹面构造，另一个具有凸面构造。例如，发散光入射到第一曲面。由于第一和第二曲面处的折射，从第一曲面入射到本体的光的光强度分布与从第二曲面出射的光的光强度分布不同。光强分布变换装置可以用作光学数据存储装置中的准直透镜或物镜。

3. 发明授权

US06201229B1 Light intensity converter 有权
标题翻译：光强转换器
公开(公告)号：US06201229B1
公开(公告)日：2001-03-13
申请号：US09128656
申请日：1998-08-04
申请人： Fumihiro Tawa , Shinya Hasegawa
发明人： Fumihiro Tawa , Shinya Hasegawa
IPC分类号： G02B704
CPC分类号： B23K26/032 , B23K26/06 , B23K26/064 , B23K26/0648 , B23K26/0665 , G02B26/02 , G02B27/09 , G11B7/1378 , G11B7/1381 , G11B7/1398
摘要： The light intensity converter comprises a transparent body including opposite first and second curved surfaces. The body is surrounded by an outer peripheral surface extending between the first and second curved surfaces. The body of the converter is arranged such that the incident light is made incident to the body at the first curved surface and emerges from the second curved surface. The incident light diverges in a certain area and converges in another area, by refraction, so that the light intensity distribution of the incident, first curved surface is converted into a different light intensity distribution while the light travels through the converter, and thus exits from the second curved surface.
摘要翻译：光强转换器包括透明体，其包括相对的第一和第二曲面。主体由在第一和第二弯曲表面之间延伸的外周表面包围。转换器的主体被布置成使得入射光在第一弯曲表面处入射到主体并且从第二弯曲表面出射。入射光在一定范围内发散，通过折射在另一个区域会聚，从而使入射的第一曲面的光强分布转换成不同的光强度分布，同时光线通过转换器，从而从第二个曲面。

4. 发明授权

US08481182B2 Magnetic recording medium for thermally assisted magnetic recording 失效
标题翻译：用于热辅助磁记录的磁记录介质
公开(公告)号：US08481182B2
公开(公告)日：2013-07-09
申请号：US12776858
申请日：2010-05-10
申请人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
发明人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
IPC分类号： G11B5/66
CPC分类号： G11B5/667 , G11B5/7325 , G11B5/82 , G11B2005/0021
摘要： A magnetic recording medium used for the thermally assisted magnetic recording system which fires a laser beam at a magnetic recording medium to partially heat the medium and applies a magnetic field from the outside to the part heated to lower the coercivity for recording. The magnetic recording medium is configured by a glass substrate on which a heat radiation layer, heat retention layer, intermediate layer, and recording layer are stacked. Further, the heat retention layer is configured by a member having an effective refractive index lower than the effective refractive index of the recording layer and having an temperature diffusion coefficient determined by the specific heat, density, and heat conductivity rate higher than glass and lower than metal. The material with a high temperature diffusion coefficient is used lowered in temperature diffusion coefficient using a porous structure or granular structure.
摘要翻译：一种用于热辅助磁记录系统的磁记录介质，其在磁记录介质上激发激光束以部分地加热介质并将磁场从外部施加到被加热以降低用于记录的矫顽力的部分。磁记录介质由玻璃基板构成，其上堆叠有散热层，保温层，中间层和记录层。此外，保温层由具有低于记录层的有效折射率的有效折射率的构件构成，并且具有由比玻璃高的比热，密度和导热率确定的温度扩散系数，并且低于金属。使用具有高温扩散系数的材料使用多孔结构或颗粒结构降低温度扩散系数。

5. 发明申请

US20080192616A1 OPTICAL OUTPUT DEVICE, MAGNETIC STORAGE MEDIUM DRIVE UNIT, AND HEAD SLIDER 有权
标题翻译：光输出设备，磁存储介质驱动单元和头滑块
公开(公告)号：US20080192616A1
公开(公告)日：2008-08-14
申请号：US12028567
申请日：2008-02-08
申请人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
发明人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
IPC分类号： G11B7/00
CPC分类号： G11B5/314 , G11B2005/0021
摘要： An optical device includes a clad composed of a material having a first refractive index, a core which is embedded in the clad, composed of a material having a second refractive index different from the first refractive index, and tapers toward the end-point thereof, and a light-transmitting layer which is composed of a material different from the material having the second refractive index and cuts across an optical path at the end-point thereof.
摘要翻译：光学装置包括由具有第一折射率的材料构成的包层，嵌入在包层中的芯，由具有与第一折射率不同的第二折射率的材料构成，并且朝向其端点逐渐变细，以及透光层，其由与具有第二折射率的材料不同的材料构成，并且在其端部横切光路。

6. 发明授权

US5754503A Optical device with improved focused error detection and tracing error detection for optical disk drive 失效
标题翻译：具有改进的光盘驱动器的聚焦误差检测和跟踪误差检测的光学装置
公开(公告)号：US5754503A
公开(公告)日：1998-05-19
申请号：US749231
申请日：1996-11-14
申请人： Satoshi Senba , Shinya Hasegawa , Hiroyasu Yoshikawa , Fumihiro Tawa
发明人： Satoshi Senba , Shinya Hasegawa , Hiroyasu Yoshikawa , Fumihiro Tawa
IPC分类号： G11B7/09 , G11B7/135 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/0908 , G11B7/0916
摘要： An optical device for an optical disk drive, for performing focusing error detection and tracking error detection of a laser beam converged on an optical disk. The optical device includes a diffraction grating having first, second, third, and fourth regions for diffracting a reflected beam from the optical disk in different directions. The optical device further includes a first photodetector for detecting a part of the reflected beam diffracted by the first region of the diffraction grating, a second photodetector for detecting a part of the reflected beam diffracted by the second region of the diffraction grating, a third photodetector for detecting a part of the reflected beam diffracted by the third region of the diffraction grating, and a fourth photodetector for detecting a part of the reflected beam diffracted by the fourth region of the diffraction grating. The shape and size of each of the first and second regions of the diffraction grating are optimally controlled to thereby increase a quantity of light incident on the photodetectors for focusing error detection.
摘要翻译：一种用于光盘驱动器的光学装置，用于执行会聚在光盘上的激光束的聚焦误差检测和跟踪误差检测。光学装置包括具有第一，第二，第三和第四区域的衍射光栅，用于沿不同方向衍射来自光盘的反射光束。光学装置还包括第一光电检测器，用于检测由衍射光栅的第一区域衍射的部分反射光束;第二光电检测器，用于检测由衍射光栅的第二区域衍射的部分反射光束;第三光电检测器用于检测由衍射光栅的第三区域衍射的一部分反射光束;以及第四光电检测器，用于检测由衍射光栅的第四区域衍射的部分反射光束。最佳地控制衍射光栅的第一和第二区域的形状和尺寸，从而增加入射到用于聚焦误差检测的光电探测器上的光量。

7. 发明申请

US20100290148A1 Magnetic recording medium for thermally assisted magnetic recording 失效
标题翻译：用于热辅助磁记录的磁记录介质
公开(公告)号：US20100290148A1
公开(公告)日：2010-11-18
申请号：US12776858
申请日：2010-05-10
申请人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
发明人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
IPC分类号： G11B5/02 , G11B5/66 , G11B5/73
CPC分类号： G11B5/667 , G11B5/7325 , G11B5/82 , G11B2005/0021
摘要： A magnetic recording medium used for the thermally assisted magnetic recording system which fires a laser beam at a magnetic recording medium to partially heat the medium and applies a magnetic field from the outside to the part heated to lower the coercivity for recording. The magnetic recording medium is configured by a glass substrate on which a heat radiation layer, heat retention layer, intermediate layer, and recording layer are stacked. Further, the heat retention layer is configured by a member having an effective refractive index lower than the effective refractive index of the recording layer and having an temperature diffusion coefficient determined by the specific heat, density, and heat conductivity rate higher than glass and lower than metal. The material with a high temperature diffusion coefficient is used lowered in temperature diffusion coefficient using a porous structure or granular structure.
摘要翻译：一种用于热辅助磁记录系统的磁记录介质，其在磁记录介质上激发激光束以部分地加热介质并将磁场从外部施加到被加热以降低用于记录的矫顽力的部分。磁记录介质由玻璃基板构成，其上堆叠有散热层，保温层，中间层和记录层。此外，保温层由具有低于记录层的有效折射率的有效折射率的构件构成，并且具有由比玻璃高的比热，密度和导热率确定的温度扩散系数，并且低于金属。使用具有高温扩散系数的材料使用多孔结构或颗粒结构降低温度扩散系数。

8. 发明申请

US20090097364A1 HEAD SLIDER 审中-公开
标题翻译：头滑块
公开(公告)号：US20090097364A1
公开(公告)日：2009-04-16
申请号：US12199504
申请日：2008-08-27
申请人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
发明人： Fumihiro Tawa , Wataru Odajima , Shinya Hasegawa
IPC分类号： G11B11/00
CPC分类号： G11B5/4866 , G11B5/314 , G11B5/3163 , G11B5/6088 , G11B2005/0005 , G11B2005/0021
摘要： A head slider is used for magnetic record by irradiating a recording medium with tiny spots of light. The head slider includes a slider main body having a bottom surface facing a recording medium and a top surface opposite to the bottom surface, an optical head provided in the slider main body to irradiate the recording medium with light and an optical layer to propagate light supplied from outside and lead the light to the optical head. The optical layer is curved along a curved surface formed in a portion of the slider main body to form a curved propagation path of light.
摘要翻译：通过用微小的光照射记录介质，磁头滑块用于磁记录。磁头滑动器包括具有面向记录介质的底表面和与底表面相对的顶表面的滑块主体，设置在滑块主体中的光学头，用于向记录介质照射光和光学层以传播提供的光从外部引导光线到光头。光学层沿着形成在滑块主体的一部分中的弯曲表面弯曲以形成弯曲的光的传播路径。

9. 发明申请

US20070188922A1 Magnetic head and information storage apparatus 审中-公开
标题翻译：磁头和信息存储装置
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。

10. 发明申请

US20060269218A1 Optical head, information storage apparatus, optical head design apparatus, and optical head design program storage medium 有权
标题翻译：光头，信息存储装置，光头设计装置和光头设计程序存储介质
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。

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