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1. 发明授权

US5200939A Optical head apparatus including a waveguide layer with concentric or spiral periodic structure 失效
标题翻译：光学头装置，包括具有中心或螺旋周期结构的波导层
公开(公告)号：US5200939A
公开(公告)日：1993-04-06
申请号：US474757
申请日：1991-04-04
申请人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Junichi Asada
发明人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Junichi Asada
IPC分类号： G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1365 , G11B7/0917 , G11B7/124 , G11B7/13 , G11B7/1384
摘要： An optical head arranged in such a manner that light emitted from a semiconductor laser (8) is inputted and coupled in a waveguide layer (3C) by a grating coupler (4C) having a concentric or spiral structure formed by concavities and convexities so as to convert light into waveguide light (12C) passing toward to outer periphery in the layer, the waveguide light (12C) is shifted at the outermost peripheral portion of the waveguide layer (3C) to a waveguide layer (3B) so as to convert the waveguide light (12C) into waveguide light (12B), the waveguide light (12B) is radiated by a grating coupler (4B) having a concentric or spiral periodical structure, the concentrically polarized (or radially polarized) light (13) is converted into linearly polarized light (14) by a polarizing element (10B) so as to be converged on the reflection surface (16) of the optical disc, light reflected from the reflection surface (16) is again converted into concentrically polarized (or radially polarized) light (17A) and (17B) by the polarizing element (10B) so as to be inputted and coupled in waveguide layers (3A) and (3B) by a grating coupler (4A) and the grating coupler (4B), and then to be turned into waveguide light (18A) and (18B) each of which passes through the layer, and the waveguide light (18A) and (18B) is radiated at the end portions of the waveguide layers (3A) and (3B) so as to be respectively received by photo detectors (6A) and (6B) so that a control signal and a reproduction signal are obtained.
摘要翻译： PCT No.PCT / JP89 / 00796 Sec。 371日期：1991年4月4日 102（e）日期1991年4月4日PCT PCT 1989年8月2日PCT公布。 WO90 / 01768 PCT出版物日期：1990年2月22日。一种光学头，以从半导体激光器（8）发出的光输入并通过形成有同心或螺旋结构的光栅耦合器（4C）耦合在波导层（3C）通过凹凸来将光转换成通过该层的外周的波导管（12C），波导管（12C）在波导层（3C）的最外周部分移动到波导层（3B）），以将波导光（12C）转换为波导光（12B），波导光（12B）由具有同心或螺旋周期结构的光栅耦合器（4B）辐射，同心偏振（或径向偏振）的光（13）被偏振元件（10B）转换成线偏振光（14），以便会聚在光盘的反射面（16）上，从反射面（16）反射的光再次转换为同心圆极化（或辐射）通过偏振元件（10B）输入并耦合在波导层（3A）和（3B）中，由光栅耦合器（4A）和光栅耦合器（4B）耦合在一起，然后变成每个通过该层的波导光（18A）和（18B），并且波导光（18A）和（18B）在波导层（3A）和（3B）的端部处被辐射），以便分别由光电检测器（6A）和（6B）接收，从而获得控制信号和再现信号。

2. 发明授权

US5193130A Light deflecting device 失效
标题翻译：光偏转装置
公开(公告)号：US5193130A
公开(公告)日：1993-03-09
申请号：US474763
申请日：1990-03-20
申请人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Junichi Asada
发明人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Junichi Asada
IPC分类号： G02F1/1333 , G02F1/295
CPC分类号： G02F1/1326 , G02F1/2955
摘要： The voltage signal applied between a conductive thin film (2) and a transparent conductive thin film (6) changes the aligning direction of a liquid crystal layer (5) near the surface of a waveguide layer (4) so that the refractive index of the liquid crystal (5) for waveguide light (8) is changed thereby to change the equivalent refractive index for the waveguide light (8), and thus the diffraction angle of the radiated light (9) from the waveguide layer (4) including the cyclic structure (3G) formed therein is also changed to deflect the radiated light. If the waveguide light (8) is propagated in the direction perpendicular to the longitudinal direction of the arrangement of the cyclic structure (3G), which is arranged in the form of a concentric circle, and the radiated light (9) from the waveguide layer (4) is focused at a focusing point outside the waveguide layer (4), the deflection of the radiated light (9), which is caused by applying a voltage signal between the conductive thin film (2) and the transparent conductive thin film (6), produces a displacement of the focusing point. In particular, if the conductive thin film (2) or the transparent conductive thin film (6) is divided into a large number of sections and voltage signals are individually applied to such sections, the focusing point (F) can be displaced to any optional point.
摘要翻译： PCT No.PCT / JP89 / 00797 Sec。 371 1990年3月20日第 102（e）1990年3月20日PCT PCT 1989年8月2日PCT。出版物WO90 / 0172200 日期：1990年2月22日。施加在导电薄膜（2）和透明导电薄膜（6）之间的电压信号改变靠近波导层（4）表面的液晶层（5）的对准方向，使得用于波导光（8）的液晶（5）的折射率改变，从而改变波导光（8）的等效折射率，因此来自波导的辐射光（9）的衍射角包括其中形成的环状结构（3G）的层（4）也被改变以偏转辐射光。如果波导光（8）沿垂直于以同心圆形排列的循环结构（3G）的布置的纵向的方向传播，并且辐射光（9）从波导层（4）聚焦在波导层（4）外部的聚焦点处，通过在导电薄膜（2）和透明导电薄膜（2）之间施加电压信号而引起的辐射光（9）的偏转 6），产生聚焦点的位移。特别地，如果导电薄膜（2）或透明导电薄膜（6）被分成多个部分，并且电压信号被分别施加到这些部分，则聚焦点（F）可以移位到任何可选的点。

3. 发明授权

US4991919A Optical head apparatus including concentric, periodic grating in a waveguide 失效
标题翻译：光头设备包括波导中的同心圆周期光栅
公开(公告)号：US4991919A
公开(公告)日：1991-02-12
申请号：US415224
申请日：1989-10-18
申请人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Taketoshi Yonezawa , Sadao Mizuno
发明人： Seiji Nishiwaki , Yoshinao Taketomi , Shinji Uchida , Takaaki Tomita , Taketoshi Yonezawa , Sadao Mizuno
IPC分类号： C09B23/00 , C09B23/02 , C09B23/10 , C09B23/14 , C09B29/00 , C09B67/46 , G03C1/825 , G03C1/83 , G03C5/16 , G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G03C5/16 , G03C1/832 , G11B7/0901 , G11B7/0917 , G11B7/124 , G11B7/13 , G11B7/1384 , G03C2001/7448 , G03C2200/44 , G03C2200/46
摘要： This invention provides an optical head apparatus in which a grating coupler (8), which is formed on a circular region which has a center on an axis (18) and has a periodical structure with dents and projections in a configuration of concentric circles or spirals around the axis (18), input-couples laser light (7) emitted from a semiconductor laser (5) and turns it into waveguided light (16B) which transmits in a waveguiding layer (15B). The waveguided light (16B) is converted, in a region where the waveguiding layer (15B) and a waveguiding layer (15A) overlap each other, to waveguided light (16A) which transmits in the waveguiding layer (15A). By a grating coupler (9), formed on a ring-shaped area which is located around the axis (18), which has a periodic structure with dents and projections of a configuration of concentric circles or spirals around the axis (18), the waveguided light (16A) is radiated and focused onto points (FA), (FB) and (FC) which are located on the axis (18). Light reflected from a reflecting surface (19) is input-coupled by the grating coupler (9) and is converted to waveguided light (21) which transmits through the waveguiding layer (15A) toward the center. The waveguided light (21) is radiated at the innermost edge of the waveguiding layer (15A) and the amount of radiated light is detected by a light detector (10) to obtained control signal and playback signals.
摘要翻译： PCT No.PCT / JP88 / 01344 Sec。 371日期：1989年10月18日 102（e）日期1989年10月18日PCT提交1988年12月28日PCT公布。出版物WO89 / 06424 日期：1989年7月13日。本发明提供了一种光学头装置，其中形成在圆形区域上的光栅耦合器（8），该圆形区域具有在轴线（18）上的中心并且具有凹陷和突起的周期结构围绕轴线（18）的同心圆或螺旋的构造，从半导体激光器（5）发射的输入耦合激光（7），并将其转换成在波导层（15B）中透射的波导光（16B）。波导层（16B）在波导层（15B）和波导层（15A）彼此重叠的区域中被转换成在波导层（15A）中透射的波导光（16A）。通过形成在围绕轴线（18）的环形区域上的光栅耦合器（9），该环形区域具有围绕轴线（18）的同心圆或螺旋构型的凹陷和突起的周期性结构，波导光（16A）被辐射并聚焦到位于轴线（18）上的点（FA），（FB）和（FC）上。从反射面（19）反射的光被光栅耦合器（9）输入耦合，并被转换成通过波导层（15A）向中心透射的波导光（21）。波导光（21）被辐射在波导层（15A）的最内边缘，并且由光检测器（10）检测辐射光量，以获得控制信号和重放信号。

4. 发明授权

US5313450A Optical disk drive 失效
标题翻译：光盘驱动器
公开(公告)号：US5313450A
公开(公告)日：1994-05-17
申请号：US997569
申请日：1992-12-28
申请人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
发明人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
IPC分类号： G11B7/005 , G11B7/135 , G11B20/10 , G11B7/00
CPC分类号： G11B7/1381 , G11B20/10009 , G11B7/005 , G11B7/1398
摘要： In an optical disk drive which can reproduce signals of a high density, a laser beam emitted from a laser light source is converted to a parallel beam by a collimating lens, and is shaded by a shading member as to the light around the axis, and is converged by an objective lens on a signal plane of optical disk. The distribution of the laser beam is located on a ring belt just after the passage of an aperture plane of the optical system. The fed back light is collimated by the objective lens and shaded again by the shading member around the optical axis to reach a beam splitter. The light reflected by the beam splitter is transmitted through an optical system by a control signal detector, and focus signals and tracking signals on the signal plane of optical disk are detected. On the other hand, the light transmitted through the beam splitter is detected by a detector. A primary or secondary differential signal is derived from the detected signal, and the edges or the center of the signal marks are reproduced by using the differential signal.
摘要翻译：在可再现高密度信号的光盘驱动器中，从激光光源发射的激光束通过准直透镜转换为平行光束，并且围绕轴线的光被遮光部件遮蔽，并且由物镜会聚在光盘的信号面上。激光束的分布位于刚好在光学系统的孔径平面通过之后的环带上。反馈光被物镜准直，并且遮光构件再次被光轴遮蔽以到达分束器。由分束器反射的光通过控制信号检测器通过光学系统传输，并且检测在光盘的信号平面上的聚焦信号和跟踪信号。另一方面，通过分束器传输的光被检测器检测。从检测到的信号导出初级或次级差分信号，并且通过使用差分信号再现信号标记的边缘或中心。

5. 发明授权

US5181265A Optical coupling apparatus for introducing and coupling an incident light into a wave guide 失效
标题翻译：用于将入射光引入和耦合到波导中的光耦合装置
公开(公告)号：US5181265A
公开(公告)日：1993-01-19
申请号：US675527
申请日：1991-03-26
申请人： Seiji Nishiwaki , Shinji Uchida , Junichi Asada
发明人： Seiji Nishiwaki , Shinji Uchida , Junichi Asada
IPC分类号： G02B6/34 , G02B6/42 , G11B7/12
CPC分类号： G02B6/42 , G02B6/34 , G11B7/124
摘要： A photocoupler has a polarization converting device for converting laser light emitted from a laser source to a polarized beam of light having electric vectors oriented in a direction of a tangent of a circle having its center on an optical axis of the photocoupler and the phase of which beam is shifted by .pi. at the boundary of a declination line passing the center of the circle. The wave front of the converted laser light is spherical. And, a photocoupler for exciting a waveguided light which propagates radially from the center thereof is positioned so that the input coupling efficiency becomes maximum.

6. 发明授权

US5159650A Optical disk apparatus for recording and reproducing ultra-high density signals 失效
标题翻译：用于记录和再现超高密度信号的光盘设备
公开(公告)号：US5159650A
公开(公告)日：1992-10-27
申请号：US655356
申请日：1991-02-21
申请人： Seiji Nishiwaki , Shinji Uchida , Junichi Asada
发明人： Seiji Nishiwaki , Shinji Uchida , Junichi Asada
IPC分类号： G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1381 , G11B7/0917 , G11B7/124 , G11B7/13 , G11B7/1365 , G11B7/1384
摘要： An optical disc apparatus includes an optical disk which satisfies the relationship of ##EQU1## where A.sub.s, .phi..sub.s are the amplitude reflectivity ratio and the phase difference between the regions within and out of a signal mark (27, 28) on a signal surface (16) of the optical disc, D.sub.s is the area of the signal mark (27, 28) and .lambda. is the wavelength of a light source (8), and the light reflected from signal surface (16) is input-coupled by a grating coupler (4A, 4B) into a waveguide layer to propagate as wave-guided light (18A, 18B), radiated at the end of the wave-guiding layer (3A, 3B) and received by a light detector (6A, 6B) so that a control signal and a reproduced signal can be obtained from the detector.
摘要翻译： PCT No.PCT / JP90 / 00843 Sec。 371日期1991年2月21日 102（e）日期1991年2月21日PCT Filed 1990年6月28日PCT公布。出版物WO91 / 00596 日期：1991年10月1日。一种光盘装置包括满足（Ascos phi s-1）> / = -Ds（As2-2Ascos phi s + 1）2/4λ2或Ascos phi的关系的光盘 = 1其中As，phi是光盘的信号表面（16）上的信号标记（27,28）内和之外的区域之间的振幅反射率和相位差，Ds是信号的面积标记（27,28），λ是光源（8）的波长，并且从信号表面（16）反射的光被光栅耦合器（4A，4B）输入耦合到波导层中以作为波（18A，18B）的端部辐射并由光检测器（6A，6B）接收的导光（18A，18B），从而可以从检测器获得控制信号和再现信号。

7. 发明授权

US5142394A Twisted nematic polarizing element with a concentric circle orientation surface and optical head device incorporating the same 失效
标题翻译：带有中心圆定向表面的双向极化极化元件和并入其的光学头装置
公开(公告)号：US5142394A
公开(公告)日：1992-08-25
申请号：US582418
申请日：1990-09-14
申请人： Junichi Asada , Seiji Nishiwaki , Shinji Uchida
发明人： Junichi Asada , Seiji Nishiwaki , Shinji Uchida
IPC分类号： G02F1/13 , G02B5/30 , G02B27/28 , G02F1/133 , G02F1/1337 , G11B7/135
CPC分类号： G11B7/1369 , G02B27/28 , G02B5/3016
摘要： An optical head device has a light source for emitting a light, a polarizing element for converting the linearly polarized emitted light into a concentric-circle polarized light or a radially polarized light, a concentric grating coupler through which the polarized light is introduced into a waveguide layer, and another polarizing element for converting the light radiated from the waveguide layer into a linearly polarized light. The light is applied to and reflected by the surface of an optical disk and introduced into the waveguide layer again as a concentric-circle polarized light or radially polarized light due to reversability of light, whereby the reflected light is detected. Each of the polarizing elements has a twist nematic liquid crystal layer having a linearly oriented liquid crystal orientation surface and a concentric-circle oriented liquid crystal orientation surface.

8. 发明授权

US5343038A Scanning laser microscope with photo coupling and detecting unit 失效
标题翻译：扫描激光显微镜与光耦合和检测单元
公开(公告)号：US5343038A
公开(公告)日：1994-08-30
申请号：US988972
申请日：1992-12-10
申请人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
发明人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
IPC分类号： G02B21/00 , H01J3/14
CPC分类号： G02B21/002
摘要： A scanning color laser microscope comprises red, green and blue laser sources, objective lenses for focusing R, G and B laser emitted from R, G and B laser sources on a specimen, respectively, condenser lenses for condensing R, G and B laser lights reflected from or transmitted through the specimen, wave guide layers formed on a substrate to receive R, G and B laser lights condensed, respectively, photo couplers arranged on the wave guide layers, respectively, each of which excites a guided light when the laser light condensed is incident to corresponding wave guide layer and photodetectors for detecting respective guided light excited.
摘要翻译：扫描彩色激光显微镜包括红色，绿色和蓝色激光源，用于将R，G和B激光源发射的R，G和B激光源分别聚焦在样品上的物镜，分别用于聚焦R，G和B激光的聚光透镜分别形成在基板上以接收R，G和B激光的波导层分别集中在布置在波导层上的光耦合器，每个激光束在激光时激发引导光冷凝入射到相应的波导层和光电检测器，用于检测激发的各个引导光。

9. 发明授权

US5307184A Exposure apparatus 失效
标题翻译：曝光装置
公开(公告)号：US5307184A
公开(公告)日：1994-04-26
申请号：US47349
申请日：1993-04-19
申请人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
发明人： Seiji Nishiwaki , Junichi Asada , Shinji Uchida
IPC分类号： G02B5/00 , G02B5/18 , G03F7/20 , H01L21/027 , H01L21/30 , G03H1/04 , G02B27/42
CPC分类号： G03F7/70408 , G02B5/001 , G02B5/1876 , G03H2001/0439
摘要： An exposure apparatus capable of making exposure for concentric circular periodic grating is provided with a quarter-wave plate (4), an ND filter (8a) having step-wisely different transmissions with boundaries of circle or a group of circles, an axially symmetric-shaped patterning mask (8b), an interference lens (9), before a sample substrate (10) having a photosensitive film (11). The interference lens (9) has a form of rotation symmetry with respect to optical axis (9L), and its incident surface (9P) is a flat plane, and its exit surface (9S) is a surface of revolution which is close to a circular cone.
摘要翻译：能够对同心圆周期光栅进行曝光的曝光装置设置有四分之一波片（4），具有逐渐不同的具有圆形或一组圆的透射的ND滤光片（8a）（8b），干涉透镜（9），在具有感光膜（11）的样品基板（10）之前。干涉透镜（9）具有相对于光轴（9L）旋转对称的形式，其入射面（9P）为平面，其出射面（9S）为接近于圆锥

10. 发明授权

US09263075B2 Magnetic recording medium for heat-assisted recording device and manufacturing method thereof 有权
标题翻译：用于热辅助记录装置的磁记录介质及其制造方法
公开(公告)号：US09263075B2
公开(公告)日：2016-02-16
申请号：US13347695
申请日：2012-01-10
申请人： Shinji Uchida
发明人： Shinji Uchida
IPC分类号： G11B5/65 , G11B5/66 , G11B5/72
CPC分类号： G11B5/65 , G11B5/66 , G11B5/72 , Y10T29/49021
摘要： Disclosed are a magnetic recording medium for a heat-assisted recording device, which has a high SNR at high density, and a manufacturing method thereof. The magnetic recording medium includes a non-magnetic substrate; a magnetic recording layer; a protective layer; and a liquid lubricating layer. The magnetic recording layer has a granular structure formed by magnetic portions and non-magnetic portions that surround the magnetic portions in which the non-magnetic portions between adjacent magnetic portions are recessed with respect to the magnetic portions. The non-magnetic portions have a volume percentage based on total volume of the granular structure ranging from 15 vol % to 30 vol % and include a carbon-based material. The magnetic recording medium has a surface having an arithmetic mean roughness Ra and an average length of roughness curve elements RSm such that Ra/RSm ranges from 0.05 to 0.15.
摘要翻译：公开了一种具有高密度的高SNR的热辅助记录装置的磁记录介质及其制造方法。磁记录介质包括非磁性基片; 磁记录层; 保护层; 和液体润滑层。磁记录层具有由磁性部分和非磁性部分形成的颗粒结构，磁性部分和非磁性部分围绕相邻磁性部分之间的非磁性部分相对于磁性部分凹陷的磁性部分。非磁性部分具有基于15体积％至30体积％的粒状结构的总体积的体积百分比，并且包括碳基材料。磁记录介质的表面具有算术平均粗糙度Ra和粗糙度曲线元素RSm的平均长度，使得Ra / RSm在0.05至0.15的范围内。

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