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11. 发明授权

US5684900A Wavelength locking device, beam collimating device, and optical disk apparatus 失效
标题翻译：波长锁定装置，光束准直装置和光盘装置
公开(公告)号：US5684900A
公开(公告)日：1997-11-04
申请号：US550634
申请日：1995-10-31
申请人： Seiji Nishiwaki , Junichi Asada
发明人： Seiji Nishiwaki , Junichi Asada
IPC分类号： G02B6/12 , G02B6/34 , G11B7/12 , G11B7/125 , H01S5/065 , H01S5/14 , G02B6/26
CPC分类号： G11B7/126 , G02B6/34 , G11B7/124 , H01S5/065 , H01S5/141 , G02B2006/12107
摘要： A waveguide layer is formed on a transparent substrate disposed to cross an optical axis perpendicularly, and on the waveguide layer, a concentric circular grating coupler is disposed so that the optical axis passes the center. A light beam radiated from a semiconductor laser passes through the transparent substrate and enters the waveguide layer. Light beams enter the respective positions of the grating coupler are excited and move from the periphery to the center, and the light beams pass through the center and become waveguide light beams. The waveguide light beam is the reverse wave of the waveguide light beam inputted at the transmittance position. Therefore, the radiant beam radiated from the grating coupler also becomes a reverse wave inputted at the irradiating position, and is accurately fed back to the semiconductor laser. The laser wavelength is locked since the radiant beam has wavelength selectivity.
摘要翻译：在设置成垂直于光轴的透明基板上形成波导层，并且在波导层上设置有同轴圆形光栅耦合器，使得光轴通过中心。从半导体激光器照射的光束穿过透明基板并进入波导层。光束进入光栅耦合器的相应位置被激发并从周边移动到中心，并且光束穿过中心并变成波导光束。波导光束是在透射率位置处输入的波导光束的反向波。因此，从光栅耦合器辐射的辐射束也成为在照射位置输入的反向波，并被精确地反馈给半导体激光器。激光波长被锁定，因为辐射束具有波长选择性。

12. 发明授权

US5495462A Light beam splitting apparatus 失效
标题翻译：光束分束装置
公开(公告)号：US5495462A
公开(公告)日：1996-02-27
申请号：US258203
申请日：1994-06-10
申请人： Seiji Nishiwaki , Tetsuo Kitagawa , Junichi Asada , Kiyoko Ooshima
发明人： Seiji Nishiwaki , Tetsuo Kitagawa , Junichi Asada , Kiyoko Ooshima
IPC分类号： G02B6/14 , G02B6/34 , G11B7/12 , G11B7/135 , G11B7/00
CPC分类号： G02B6/14 , G02B6/34 , G11B7/124 , G11B7/135
摘要： When a laser beam enters into a grating coupler at a right angle, a guided wave with a wave mode corresponding to an incident angle can be generated. Although the guided wave is a light beam in single mode, the waveguide mode is deflected by passing through a step-wise structure and is converted into several guided waves having several modes. When the guided waves are radiated from a straight output grating coupler, the radiant angle is dependent upon the waveguide mode, so beams are radiated in different directions according to their respective waveguide modes. Therefore, a guided wave in zero-order mode outputs a radiant beam having a larger radiant angle, while a guided wave in first-order mode outputs a radiant beam having a smaller radiant angle.
摘要翻译：当激光束以直角进入光栅耦合器时，可以产生具有对应于入射角的波形模式的导波。虽然导波是单模中的光束，但是波导模式通过逐步结构而被偏转，并被转换为具有若干模式的几个导波。当从直线输出光栅耦合器辐射导波时，辐射角取决于波导模式，因此根据各自的波导模式，波束沿不同方向辐射。因此，零阶模式的导波输出具有较大辐射角的辐射束，而一阶模式的导波输出具有较小辐射角的辐射束。

13. 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。

14. 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

15. 发明授权

US08045432B2 Optical disc device 失效
标题翻译：光盘设备
公开(公告)号：US08045432B2
公开(公告)日：2011-10-25
申请号：US12296822
申请日：2007-03-19
申请人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
发明人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/131 , G11B7/1353
摘要： Light emitted from a radiation light source 1 passes through a diffraction grating 3a and is separated into transmitted light a and +1st/−1st order diffracted lights b, c. These lights are collected through an objective lens 7 on tracks of an optical disc 8 in a partially overlapped state. Light reflected by the tracks passes through the objective lens 7 and is incident upon light diverging means 13a. Subsequently, light corresponding to the transmitted light “a” diverges into two light beams that are respectively incident upon light detection regions A1, A2, light corresponding to the diffracted lights “b” and “c” respectively diverges into two light beams that are respectively incident upon light detection regions B1, B2, and C1, C2. A tracking error signal associated with the tracks of the optical disc 8 is generated by combining signals detected in the light detection regions A1, A2, B1, B2, C1, and C2.
摘要翻译：从辐射光源1发射的光通过衍射光栅3a并分离为透射光a和+ 1 / -1级衍射光b，c。这些光以部分重叠的状态通过物镜7收集在光盘8的轨道上。由轨道反射的光通过物镜7并入射到光发散装置13a上。随后，对应于透射光“a”的光分散入分别入射到光检测区域A1，A2的两个光束，分别对应于衍射光“b”和“c”的光分别发散成两个光束入射到光检测区域B1，B2和C1，C2。通过组合在光检测区域A1，A2，B1，B2，C1和C2中检测到的信号来产生与光盘8的轨道相关联的跟踪误差信号。

16. 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。

17. 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。

18. 发明申请

US20090279403A1 OPTICAL DISC DEVICE 失效
标题翻译：光盘设备
公开(公告)号：US20090279403A1
公开(公告)日：2009-11-12
申请号：US12296822
申请日：2007-03-19
申请人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
发明人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/0903 , G11B7/094 , G11B7/131 , G11B7/1353
摘要： Light emitted from a radiation light source 1 passes through a diffraction grating 3a and is separated into transmitted light a, +1st order diffracted light b, and −1st order diffracted light c. The transmitted light a, +1st order diffracted light b, and −1st order diffracted light c are collected through an objective lens 7 on tracks on the signal plane 8a of an optical disc 8 in a partially overlapped state. Light reflected by the tracks on the signal plane 8a passes through the objective lens 7 and is incident upon light diverging means 13a. Subsequently, depending on the location of incidence, light corresponding to the transmitted light “a” diverges into two light beams that are respectively incident upon light detection regions A1, A2, light corresponding to the +1st order diffracted light “b” diverges into two light beams that are respectively incident upon light detection regions B1, B2, and light corresponding to the −1st order diffracted light “c” diverges into two light beams that are respectively incident upon light detection regions C1, C2. A tracking error signal associated with the tracks of the optical disc 8 is generated by combining signals detected in the light detection regions A1, A2, B1, B2, C1, and C2. Based on the above-described configuration, the influence of lens shift-induced off-track can be cancelled without impairing the detected tracking error signal output even without rotational adjustment of the rectilinear gratings.
摘要翻译：从辐射光源1发射的光通过衍射光栅3a并分离为透射光a + 1级衍射光b和-1级衍射光c。透射光a，+ 1级衍射光b和-1级衍射光c以部分重叠的状态通过物镜7在光盘8的信号平面8a上的轨道上被收集。由信号平面8a上的轨道反射的光通过物镜7并入射到光发散装置13a上。随后，根据入射位置，对应于透射光“a”的光分散到分别入射到光检测区域A1，A2的两个光束中，对应于+ 1级衍射光“b”的光分叉成两个分别入射到光检测区域B1，B2和对应于-1级衍射光“c”的光的光束分叉成分别入射到光检测区域C1，C2的两个光束。通过组合在光检测区域A1，A2，B1，B2，C1和C2中检测到的信号来产生与光盘8的轨道相关联的跟踪误差信号。基于上述配置，即使没有直线光栅的旋转调节，也可以消除透镜偏移诱导偏离磁道的影响，而不损害检测到的跟踪误差信号输出。

19. 发明申请

US20090028036A1 OPTICAL DISC DEVICE 审中-公开
标题翻译：光盘设备
公开(公告)号：US20090028036A1
公开(公告)日：2009-01-29
申请号：US12282598
申请日：2007-03-13
申请人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
发明人： Seiji Nishiwaki , Kazuo Momoo , Junichi Asada
IPC分类号： G11B7/135
CPC分类号： G11B7/0901 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： The invention permits stable tracking with few control errors, uninfluenced by stray light reflected by signal surfaces other than the signal surface being used for focusing during recording and playback of a multilayer disc. To this end, the optical splitter element of the optical disc device according to the present invention has first areas (21c-24c), which include the location (20) of the optical axis of light incident from the objective lens, and, around the periphery of the first areas, second areas (21a-24a, 21b-24b) positioned at locations displaced from the optical axis. The detection surface (9a) of the photodetector has first detection areas (97, 98) detecting light incident from the first areas and second detection areas (95, 96) detecting light incident from the second areas. The second detection areas are used for detecting tracking error signals. If the optical disc has multiple signal surfaces, light that is reflected by signal surfaces other than the signal surface being used for focusing and is incident on the photodetector from the first areas is not incident on the second detection areas.
摘要翻译：本发明允许具有很少控制误差的稳定跟踪，不受在多层盘的记录和重放期间用于聚焦的信号表面以外的信号表面反射的杂散光的影响。为此，根据本发明的光盘装置的光分路器元件具有第一区域（21c-24c），其包括从物镜入射的光的光轴的位置（20），并且围绕第一区域的周边，位于偏离光轴的位置的第二区域（21a-24a，21b-24b）。光检测器的检测表面（9a）具有检测从第一区域入射的光的第一检测区域（97,98）和检测从第二区域入射的光的第二检测区域（95,96）。第二检测区域用于检测跟踪误差信号。如果光盘具有多个信号表面，则由信号表面以外的信号表面反射的光被用于聚焦并且从第一区域入射到光电检测器上的光不会入射到第二检测区域。

20. 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。

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