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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

US07239599B2 Light irradiation head and information storage apparatus 失效
标题翻译：光照射头和信息存储装置
公开(公告)号：US07239599B2
公开(公告)日：2007-07-03
申请号：US11057989
申请日：2005-02-15
申请人： Fumihiro Tawa , Shinya Hasegawa
发明人： Fumihiro Tawa , Shinya Hasegawa
IPC分类号： G11B7/00
CPC分类号： G11B5/127 , G11B11/10532 , G11B2005/0005 , G11B2005/0021
摘要： A light irradiation head of the present invention includes: a propagation body having a tapered two dimensional shape axially symmetrical to a predetermined symmetrical axis, and consisting of a first kind material that propagates electromagnetic fields of light; and a covering body covering the propagation body so as to surround the symmetrical axis, and consisting of a second kind material different from the first kind material. The propagation body further includes: a bottom edge of projecting shape or recessed shape which is present on the symmetrical axis and which is axially symmetrical to the symmetrical axis; a tip edge which is present on the symmetrical axis and which is narrow relative to the bottom edge; and a pair of reflective edges which are present on both sides of the symmetrical axis and whose interval is gradually reduced in the direction from the bottom edge side to the tip edge side.
摘要翻译：本发明的光照射头包括：具有与预定对称轴轴对称的锥形二维形状的传播体，由传播电磁场的第一种材料构成; 以及覆盖所述传播体以覆盖所述对称轴线的覆盖体，并且由与所述第一种材料不同的第二种材料构成。传播体还包括：在对称轴上存在并且与对称轴线轴对称的突出形状或凹陷形状的底部边缘; 尖端边缘，其位于对称轴线上并且相对于底部边缘窄; 以及一对反射边缘，其存在于对称轴线的两侧，并且其间隔从底边缘侧到前端边缘侧的方向逐渐减小。

5. 发明授权

US06985421B2 Optical device having a light emission unit emitting a light beam reflected by a light reflection unit to a substrate, and optical information recording apparatus using the same 失效
标题翻译：具有将由光反射单元反射的光束发射到基板的发光单元的光学装置，以及使用该发光单元的光学信息记录装置
公开(公告)号：US06985421B2
公开(公告)日：2006-01-10
申请号：US09812031
申请日：2001-03-19
申请人： Fumihiro Tawa , Shinya Hasegawa , Tetsuo Koezuka
发明人： Fumihiro Tawa , Shinya Hasegawa , Tetsuo Koezuka
IPC分类号： G03B17/48
CPC分类号： G03B17/48
摘要： In an optical device and optical information recording apparatus of the invention, a light emission unit has an emission layer emitting a light beam along an optical axis. A light reflection unit reflects the light beam, emitted by the light emission unit, to a predetermined direction. A substrate has photodetecting elements disposed thereon, the photodetecting elements detecting a reflected light beam from a storage medium. The emission layer of the light emission unit is slanted to a central axis of the substrate, and the light emission unit and the light reflection unit are disposed on the substrate such that one of a change of a distribution of intensity of the reflected light beam from the light reflection unit and a change of a direction of polarization of the reflected light beam, caused by the slanted emission layer, is corrected.
摘要翻译：在本发明的光学装置和光学信息记录装置中，发光单元具有沿光轴发射光束的发射层。光反射单元将由发光单元发射的光束反射到预定方向。基板上设置有受光元件，受光元件检测来自存储介质的反射光束。发光单元的发射层向基板的中心轴线倾斜，并且发光单元和光反射单元设置在基板上，使得反射光束的强度分布的变化校正由倾斜发射层引起的光反射单元和反射光束的偏振方向的变化。

6. 发明授权

US06469838B2 Illumination device having light intensity distribution converting elements 有权
标题翻译：具有光强分布转换元件的照明装置
公开(公告)号：US06469838B2
公开(公告)日：2002-10-22
申请号：US10046219
申请日：2002-01-16
申请人： Fumihiro Tawa , Shinya Hasegawa
发明人： Fumihiro Tawa , Shinya Hasegawa
IPC分类号： G02B1308
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。

7. 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。

8. 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。

9. 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。

10. 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。

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