公开(公告)号：US4892375A

公开(公告)日：1990-01-09

申请号：US347058

申请日：1989-05-04

申请人： Kiyofumi Chikuma ,  Sota Okamoto

发明人： Kiyofumi Chikuma ,  Sota Okamoto

IPC分类号： G02B3/02 ,  G02B3/04 ,  G02B6/26 ,  G02B6/32 ,  G02B6/42 ,  G02F1/37 ,  G02F1/383

CPC分类号： G02B3/04 ,  G02B6/262 ,  G02B6/32 ,  G02B6/4206 ,  G02F1/383

摘要： A fibre-type light conversion device comprises a fibre-type conversion element for changing the wavelength of an incident light and a converging lens for converging said incident light whose wavelength is changed by the conversion element. The device is characterized in that the converging lens is a single lens having an aspherical surface configured such that a distance Zi from a plane perpendicular to an optical axis of the lens and passing an extremity of the lens to a point on the aspherical surface having a height Y from the optical axis is expressed by the following equation ##EQU1## where Ci is an inverse number of the radius of curvature of the "i"th surface at an intersecting point between the "i"th surface and the optical axis, Ki, A.sub.1 (i).about.A.sub.10 (i) are constants, and Y is the height from the optical axis to the refracting surface.

摘要翻译： 光纤型光转换装置包括用于改变入射光的波长的光纤型转换元件和用于会聚由波长被转换元件改变的入射光的会聚透镜。 该装置的特征在于，会聚透镜是具有非球面的单一透镜，其被配置为使得距垂直于透镜的光轴的平面的距离Zi并将透镜的末端传递到非球面上的点，具有 来自光轴的高度Y由以下等式表示：＆lt; IMAGE＆gt; + TR A8（i）Y8 + A10（i）Y10其中Ci是交点处的第i个曲面的曲率半径的倒数 在第i个表面和光轴之间，Ki，A1（i）DIFFERENCE A10（i）是常数，Y是从光轴到折射表面的高度。

公开(公告)号：US07333525B2

公开(公告)日：2008-02-19

申请号：US11038576

申请日：2005-01-21

申请人： Yoshinori Kimura ,  Mamoru Miyachi ,  Kiyofumi Chikuma

发明人： Yoshinori Kimura ,  Mamoru Miyachi ,  Kiyofumi Chikuma

IPC分类号： H01S5/00

CPC分类号： H01S5/4031 ,  H01S5/0202 ,  H01S5/0217 ,  H01S5/0224 ,  H01S5/02272 ,  H01S5/32325 ,  H01S5/32341 ,  H01S5/405 ,  H01S5/4087

摘要： An integrated semiconductor light-emitting device suitable for being mounted on a pickup is provided. The integrated semiconductor light-emitting device has a first laser part stacked on a semiconductor substrate and a projection-shaped second laser part formed by stack in thin-film-layer form. The second laser part is fitted into a trench formed adjacent to the first laser part in the semiconductor substrate. At least the first and second laser parts and the trench are bonded together through a metal bonding layer. An emission spot of the first laser part and an emission spot of the second laser part are located away in approximately the same horizontal direction perpendicular to the direction of the stack of the first and second laser parts.

摘要翻译： 提供一种适于安装在拾取器上的集成半导体发光器件。 集成半导体发光器件具有堆叠在半导体衬底上的第一激光器部分和以薄膜层形式堆叠形成的突出形状的第二激光器部分。 第二激光器部件装配到与半导体衬底中的第一激光器部分相邻形成的沟槽中。 至少第一和第二激光部分和沟槽通过金属粘结层粘合在一起。 第一激光部的发光点和第二激光部的发光点位于与第一激光部和第二激光部的堆叠的方向垂直的大致相同的水平方向上。

公开(公告)号：US20050122886A1

公开(公告)日：2005-06-09

申请号：US10992094

申请日：2004-11-19

申请人： Hirokazu Takahashi ,  Atsushi Onoe ,  Kiyofumi Chikuma

发明人： Hirokazu Takahashi ,  Atsushi Onoe ,  Kiyofumi Chikuma

IPC分类号： G11B9/00 ,  G11B9/02 ,  G11B9/07 ,  G11B9/08 ,  G11B9/14 ,  G11B11/00 ,  G11B11/08 ,  G11B7/00

CPC分类号： G11B11/08 ,  B82Y10/00 ,  G11B9/02 ,  G11B9/075 ,  G11B9/08 ,  G11B9/14 ,  G11B9/1409 ,  G11B9/1436 ,  G11B9/1445 ,  G11B11/007

摘要： A recording/reproducing head for performing at least one of a record operation of recording information onto a dielectric recording medium and a reproduction operation of reproducing the information from the dielectric recording medium, the recording/reproducing head provided with: a support member which extends in a longitudinal direction of the recording/reproducing head; and a projection portion which is mounted on the support member such that a tip of the projection portion faces the dielectric recording medium, the projection portion having a ridge-line on the tip, the projection portion being capable of contacting the dielectric recording medium at one point on the ridge-line.

摘要翻译： 一种记录/再现头，用于执行将记录信息记录到介质记录介质上的记录操作和从介质记录介质再现信息的再现操作中的至少一个，所述记录/再现头设置有： 记录/再现头的纵向方向; 以及突出部，其安装在所述支撑构件上，使得所述突出部的前端面向所述介电记录介质，所述突出部在所述尖端上具有脊线线，所述突出部能够使所述电介质记录介质在一个 点在脊线上。

公开(公告)号：US06711192B1

公开(公告)日：2004-03-23

申请号：US09567024

申请日：2000-05-09

申请人： Kiyofumi Chikuma ,  Hiroyuki Ota ,  Toshiyuki Tanaka

发明人： Kiyofumi Chikuma ,  Hiroyuki Ota ,  Toshiyuki Tanaka

IPC分类号： H01S500

CPC分类号： H01S5/22 ,  H01L2224/48463 ,  H01S5/0202 ,  H01S5/0215 ,  H01S5/0217 ,  H01S5/32341 ,  H01S2304/04

摘要： A method for fabricating a nitride semiconductor laser device having crystal layers each made of a group III nitride semiconductor (AlxGa1−x)1−YInyN (0≦x≦1, 0≦y≦1) layered in order on a ground layer (Alx′Ga1−x′)1−y′Iny′N (0≦x′≦1, 0≦y′≦1). The method including a step of forming a plurality of crystal layers each made of group III nitride semiconductor on a ground layer formed on a substrate such as sapphire; a step of applying a light beam from the substrate side toward the interface between the substrate and the ground layer thereby forming the decomposed-matter area of a nitride semiconductor; a step of separating the ground layer carrying the crystal layers from the substrate along the decomposed-matter area; and a step of cleaving the ground layer thereby forming a cleavage plane of the crystal layers.

摘要翻译： 一种用于制造氮化物半导体激光器件的方法，该器件具有各自由III族氮化物半导体（Al x Ga 1-x）1-Y In y N（0 <= x <= 1,0 <= y <= 1） 接地层（Al x Ga 1-x'）1-y'In y'N（0 <= x'<= 1,0 <= y'<= 1）。 该方法包括在形成在诸如蓝宝石的衬底上的接地层上形成由III族氮化物半导体制成的多个晶体层的步骤; 从基板侧朝向基板和接地层之间的界面施加光束，从而形成氮化物半导体的分解物区域的步骤; 沿着分解物区域从基板分离携带晶体层的接地层的步骤; 以及切割接地层从而形成晶体层的解理面的步骤。

公开(公告)号：US6163397A

公开(公告)日：2000-12-19

申请号：US271914

申请日：1999-03-18

申请人： Atsushi Onoe ,  Ayako Yoshida ,  Kiyofumi Chikuma

发明人： Atsushi Onoe ,  Ayako Yoshida ,  Kiyofumi Chikuma

IPC分类号： G02F1/37 ,  G02F1/35 ,  G02F1/355 ,  G02F1/365 ,  G02F1/377

CPC分类号： G02F1/3551 ,  G02F1/365 ,  G02F1/377 ,  G02F2001/3546

摘要： A wavelength converting device for converting a wavelength of a light is provided. The wavelength converting device includes: a substrate comprising MgO; a waveguide membrane comprising KNbO.sub.3, for guiding the light; a buffer membrane which is disposed between the substrate and the waveguide membrane and which comprises KTa.sub.x Nb.sub.(1-x) O.sub.3. A mixing rate of Ta in the KTa.sub.x Nb.sub.(1-x) O.sub.3 in the buffer membrane is in a range of 40 atom % to 60 atom % at a surface of the buffer membrane touching the substrate, and is 0 atom % at a surface of the buffer membrane touching the waveguide membrane.

摘要翻译： 提供了用于转换光的波长的波长转换装置。 波长转换装置包括：包含MgO的基板; 包括用于引导光的KNbO 3的波导膜; 缓冲膜，其设置在基板和波导膜之间，并且包括KTaxNb（1-x）O 3。 缓冲膜中的KTaxNb（1-x）O 3中的Ta的混合比在缓冲膜的与基材接触的表面处为40原子％〜60原子％的范围，并且在表面为0原子％ 缓冲膜接触波导膜。

公开(公告)号：US5285274A

公开(公告)日：1994-02-08

申请号：US800087

申请日：1991-11-29

申请人： Naohiro Tanno ,  Teruo Toma ,  Kiyofumi Chikuma

发明人： Naohiro Tanno ,  Teruo Toma ,  Kiyofumi Chikuma

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B7/14 ,  G11B7/24 ,  G11C13/04 ,  H01S5/12 ,  G02B6/10 ,  G01D15/10

CPC分类号： G11B7/128 ,  G11B7/005 ,  G11B7/1245 ,  G11B7/14 ,  G11B7/24 ,  H01S5/1215

摘要： An optical waveguide recording medium including an optical waveguide having a photocoupler for receiving a light beam, and a plurality of refractive index-discontinuous portions aligned on the optical waveguide. One of the refractive index-discontinuous portions includes a diffraction grating having grooves extending approximately perpendicular to the lengthwise direction of the optical waveguide at equal intervals which gradually become narrower or wider as the distance of that refractive index-discontinuous portion from the photocoupler increases. This recording medium ensures that information is recorded with high density. A playing apparatus for an optical waveguide recording medium includes a light emitting means for generating a light beam with a modulated wavelength, an irradiating means for guiding the light beam to the photocoupler, a photodetecting means for performing photoelectric conversion of the light beam to provide an electric output, and a light-receiving means for guiding reflected signal light, reflected for each wavelength at the refractive index-discontinuous portions, subjected to amplitude and phase modulations, and returning via the photocoupler, to a light-receiving section of the photodetecting means.

摘要翻译： 一种光波导记录介质，包括具有用于接收光束的光电耦合器的光波导和在光波导上对准的多个折射率不连续部分。 折射率不连续部分之一包括衍射光栅，该衍射光栅具有以相等的间隔大致垂直于光波导的长度方向延伸的凹槽，随着该光耦合器的折射率不连续部分的距离增加，该光栅逐渐变窄或变宽。 该记录介质确保以高密度记录信息。 用于光波导记录介质的播放装置包括用于产生具有调制波长的光束的发光装置，用于将光束引导到光电耦合器的照射装置，用于执行光束的光电转换以提供光束的光检测装置 电输出，以及光接收装置，用于引导经过振幅和相位调制的折射率不连续部分的每个波长反射的反射信号光，并经由光电耦合器返回到光电检测装置的光接收部分 。

公开(公告)号：US5197110A

公开(公告)日：1993-03-23

申请号：US755017

申请日：1991-09-04

申请人： Kiyofumi Chikuma ,  Sota Okamoto

发明人： Kiyofumi Chikuma ,  Sota Okamoto

IPC分类号： G02F1/37 ,  G02F1/383

CPC分类号： G02F1/383 ,  G02F2001/374

摘要： A wavelength converting device is constructed by: a fiber type wavelength converting device which uses the Cerenkov radiation type phase matching and comprises a non-linear optical crystalline core and a clad; and a transparent resin portion surrounding the wavelength converting device, wherein the resin portion has a resin outgoing edge surface of a large enough size such that the entire second harmonics light is emitted from the outgoing edge surface. The above device is a light-wavelength converting device having long enough operation length and a high conversion efficiency and is a device having an excellent environmental resistance and a high coupling efficiency.

摘要翻译： 波长转换装置由以下部分构成：光纤型波长转换装置，其使用切伦科夫辐射型相位匹配并且包括非线性光学晶体核心和包层; 以及围绕波长转换装置的透明树脂部分，其中树脂部分具有足够大的树脂出射边缘表面，使得整个二次谐波光从出射边缘表面发射。 上述装置是具有足够长的操作长度和高转换效率的光波长转换装置，并且是具有优异的耐环境性和高耦合效率的装置。

公开(公告)号：US5172369A

公开(公告)日：1992-12-15

申请号：US637036

申请日：1991-01-03

申请人： Kiyofumi Chikuma ,  Sota Okamoto

发明人： Kiyofumi Chikuma ,  Sota Okamoto

IPC分类号： G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B13/04

CPC分类号： G11B7/1359 ,  G11B11/10543 ,  G11B11/10597 ,  G11B13/04 ,  G11B7/125 ,  G11B7/1353

摘要： An optical pickup using a fiber type SHG, an optical information recording carrier and an information recording and reproducing apparatus. In the optical pickup, the primary ray which was removed in conventional arrangements is utilized thereby the same pickup can be used not only for an optical disk of a high density but also for an optical disk of a usual record density. To raise the recording density of the information recording carrier the laminated structure is utilized to record information. Two rays having different wavelengths are directed onto the record layer and onto the recordable layer of the optical disk, and the information recording and reproducing apparatus performs the reproducing of information as well as error detection and record/reproduction of information, so that a novel reproduction mode is realized.

公开(公告)号：US5172366A

公开(公告)日：1992-12-15

申请号：US607418

申请日：1990-10-31

申请人： Kiyofumi Chikuma

发明人： Kiyofumi Chikuma

IPC分类号： G11B7/125 ,  G11B7/13 ,  G11B7/135

CPC分类号： B82Y10/00 ,  G11B7/125 ,  G11B7/13 ,  G11B7/1381

摘要： To prevent a drop in signal level at high spatial frequencies, an optical information reproducing apparatus retrieves the primary output of light reflected from the surface of a recording medium. In the different embodiments of the invention, either a shield plate with a pinhole in the path of the light is provided, or a photodetector having a plurality of light-receiving elements is provided, a selection circuit being connected to the elements and selecting the highest output thereof.

摘要翻译： 为了防止在高空间频率处的信号电平下降，光信息再现装置检索从记录介质的表面反射的光的主要输出。 在本发明的不同实施例中，提供了在光路中具有针孔的屏蔽板，或者提供具有多个光接收元件的光电检测器，选择电路连接到元件并选择最高 输出。

公开(公告)号：US5112122A

公开(公告)日：1992-05-12

申请号：US577751

申请日：1990-09-05

申请人： Kiyofumi Chikuma ,  Sota Okamoto

发明人： Kiyofumi Chikuma ,  Sota Okamoto

IPC分类号： G02B6/02 ,  G02B6/34 ,  G02B6/42 ,  G02F1/37 ,  G02F1/383

CPC分类号： G02B6/4206 ,  G02B6/34 ,  G02F1/383

摘要： A fiber-type light conversion device comprises: a fiber-type light conversion element having a core made of non-linear optical crystal for changing the wavelength of an incident light to half by the phase matching of Cerenkov radiation; and a collimating optical system for transforming an emergent light beam emitted from the light conversion element into a parallel light beam, wherein the collimating optical system has lenses having a large spherical aberration .DELTA.z. Furthermore, the quantity of spherical aberration .DELTA.z is determined so as to satisfy the following equation of:.DELTA.z=.DELTA.h/tan.theta.where, on the assumption that a pair of parallel lights are incident to the collimating optical system at heights from the optical axis thereof different from each other, then .DELTA.h represents a difference between a pair of different heights of the parallel lights and .theta. represents an angle of emergence of the emergent light with respect to the optical axis.

摘要翻译： 光纤型光转换装置包括：具有由非线性光学晶体制成的芯的光纤型光转换元件，用于通过Cerenkov辐射的相位匹配将入射光的波长改变为一半; 以及用于将从光转换元件发射的出射光束变换为平行光束的准直光学系统，其中准直光学系统具有具有大球面像差DELTA z的透镜。 此外，球面像差DELTA z的量被确定为满足以下等式：DELTA z = DELTA h /tanθ其中，假设一对平行光入射到准直光学系统的高度处， 其光轴彼此不同，则DELTA h表示平行光的一对不同高度之间的差，θ表示出射光相对于光轴的出射角。