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：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。

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。

公开(公告)号：US07492804B2

公开(公告)日：2009-02-17

申请号：US11312665

申请日：2005-12-20

申请人： Fumihiro Tawa

发明人： Fumihiro Tawa

IPC分类号： H01S3/03

CPC分类号： G11B5/314 ,  G11B11/10532 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A near-field light emitting device includes a deflecting unit that deflects electromagnetic waves propagated through a core toward a base. A propagating unit arranged on the base emits near-field light from an outlet. By providing a magnetic head on a side opposite to the base, a distance between the magnetic head and an intensity center of the near-field light can be minimized. The deflecting unit is formed comparatively thick, therefore, the electromagnetic wave is caused to enter the propagating unit at such an angle that causes a surface-propagating wave to be generated highly efficiently.

摘要翻译： 近场发光器件包括偏转单元，该偏转单元使通过芯传播的电磁波朝向基底偏转。 布置在基座上的传播单元从出口发射近场光。 通过在与基座相对的一侧设置磁头，磁头与近场光的强度中心之间的距离可以最小化。 偏转单元形成得比较厚，因此使得电磁波以能够高效率地产生表面传播波的角度进入传播单元。

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。

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。

公开(公告)号：US20050084800A1

公开(公告)日：2005-04-21

申请号：US10974162

申请日：2004-10-27

申请人： Fumihiro Tawa

发明人： Fumihiro Tawa

IPC分类号： G11B7/24038 ,  G03C11/00 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/24

CPC分类号： G11B7/24038 ,  G11B7/00455 ,  G11B7/1275 ,  G11B7/13927 ,  G11B7/24 ,  G11B2007/0013 ,  Y10S430/146

摘要： A multilayer optical recording medium including a first recording layer for recording or reproducing information by using a first light beam having a center wavelength λ1, a first photochromic layer provided on the first recording layer, and a first optical waveguide layer provided on the first photochromic layer for guiding to the first photochromic layer a second light beam having a center wavelength λ2 different from the center wavelength λ1. The multilayer optical recording medium further includes a second recording layer provided on the first optical waveguide layer for recording or reproducing information by using the first light beam, a second photochromic layer provided on the second recording layer, and a second optical waveguide layer provided on the second photochromic layer for guiding the second light beam to the second photochromic layer. The first and second photochromic layers become transparent to the first light beam by irradiation with light or by application of heat. The reflectance of each of the first and second photochromic layers to the first light beam can be repeatedly increased by irradiation with the second light beam and can be repeatedly decrease to restore the transparent state.

摘要翻译： 一种多层光学记录介质，包括用于通过使用具有中心波长λ1的第一光束记录或再现信息的第一记录层，设置在第一记录层上的第一光致变色层和设置在第一光致变色上的第一光波导层 层，用于引导第一光致变色层具有不同于中心波长λ1的中心波长λ2的第二光束。 多层光学记录介质还包括设置在第一光波导层上的第二记录层，用于通过使用第一光束记录或再现信息，设置在第二记录层上的第二光致变色层和设置在第二光波导层上的第二光波导层 用于将第二光束引导到第二光致变色层的第二光致变色层。 第一和第二光致变色层通过照射光或通过加热而变得对第一光束透明。 通过用第二光束的照射可以使第一和第二光致变色层中的每一个对第一光束的反射率反复增加，并且可以重复降低以恢复透明状态。

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。

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。

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。