公开(公告)号：US06970486B2

公开(公告)日：2005-11-29

申请号：US09858508

申请日：2001-05-17

申请人： Naotaro Nakata

发明人： Naotaro Nakata

IPC分类号： G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  H01L31/12 ,  H01S5/00 ,  H01S5/022 ,  H01S5/042 ,  H01S3/04

CPC分类号： H01S5/02248 ,  H01S5/02244 ,  H01S5/0683

摘要： A sub-mount (7) provided with a laser chip (8) and a light receiving element (5) for monitoring is bonded to a die pad portion (2a) of a first lead (2). An electrode of the laser chip and an electrode of the light receiving element are electrically connected to second leads (3, 4) by wires such as metallic wires, not shown, respectively. A resin frame (6) is provided to cover sides and a rear surface side of the sub-mount except for an emission surface side of the laser chip and to integrally hold one end portion sides of the first and second leads. An antireflection unit (9) for preventing light from being reflected on the light receiving element is formed on a portion of the resin frame opposite to the rear end face of the laser chip. As a result, it is possible to obtain a mold type semiconductor laser capable of constantly detect accurate laser chip output and capable of forming an accurate optical output control circuit.

摘要翻译： 设置有用于监测的激光芯片（8）和受光元件（5）的子安装座（7）被接合到第一引线（2）的管芯焊盘部分（2a）。 激光芯片的电极和受光元件的电极分别通过未示出的金属线等电线电连接到第二引线（3,4）。 树脂框架（6）设置成覆盖激光芯片的发射表面侧以外的副安装座的侧面和后表面侧，并且一体地保持第一和第二引线的一个端部侧面。 在树脂框架的与激光芯片的后端面相对的部分上形成有用于防止在受光元件上反射光的防反射单元（9）。 结果，可以获得能够不断地检测准确的激光芯片输出并且能够形成精确的光输出控制电路的模具型半导体激光器。

公开(公告)号：US5339373A

公开(公告)日：1994-08-16

申请号：US120420

申请日：1993-09-14

申请人： Haruo Tanaka ,  Naotaro Nakata

发明人： Haruo Tanaka ,  Naotaro Nakata

IPC分类号： G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01L31/0232 ,  H01S5/00 ,  G02B6/00 ,  G02B6/36

CPC分类号： G02B6/4215 ,  G02B6/29367

摘要： An optical branching and coupling device is provided in which the loss of light in receiving and in transmission is substantially reduced while at the same time the wavelength-branching characteristic is remarkably improved. The optical branching and coupling device connected to a first optical fiber for inputting a first ray of light and a second ray of light of which respective wavelengths are different from each other and for outputting the first ray and to a second optical fiber for outputting the second ray, and having therein a light-emitting element for emitting the first ray and a light-receiving element for receiving the first ray, the optical branching and coupling device including a first filter for receiving the two rays input from the first optical fiber and a ray of light emitted from the light-emitting element, and a second filter for receiving the rays from the first filter and sending them to the second optical fiber and to the light-receiving element, wherein the first filter is formed, on its front side, with a first filter film adapted to substantially transmit the first ray and to substantially reflect the second ray and, on its back side, with a mirror film adapted to transmit a portion of each of the rays and to reflect the rest thereof; and wherein the second filter is formed, on its front side, with a second filter film adapted to substantially transmit the first ray and to substantially reflect the second ray and, on its back side, with an antireflective film adapted to substantially transmit the first ray.

摘要翻译： 提供了一种光分支和耦合装置，其中接收和传输中的光的损耗大大降低，同时波长分支特性显着提高。 连接到用于输入第一光线的第一光纤的光分支和耦合装置和各波长彼此不同并用于输出第一光线的第二光线和用于输出第二光线的第二光纤 并且其中具有用于发射第一光线的发光元件和用于接收第一光线的光接收元件，所述光分支和耦合装置包括用于接收从第一光纤输入的两条光线的第一滤光器和 从发光元件发出的光线;以及第二滤光器，用于接收来自第一滤光器的光线并将它们发送到第二光纤和光接收元件，其中形成第一滤光器，在其正面 具有适于基本上透射第一光线并且基本上反射第二光线的第一滤光膜，并且在其背面上具有适于透射端口的镜膜 在每个射线上，并反射其余部分; 并且其中所述第二过滤器在其前侧具有适于基本上透射所述第一射线并基本上反射所述第二射线的第二过滤膜，并且在其背侧上形成适于基本上透射所述第一射线的抗反射膜 。

公开(公告)号：US06548803B1

公开(公告)日：2003-04-15

申请号：US09684955

申请日：2000-10-05

申请人： Naotaro Nakata ,  Hironori Endo

发明人： Naotaro Nakata ,  Hironori Endo

IPC分类号： H01J314

CPC分类号： B41J2/01 ,  G01J1/02

摘要： A light receiving unit comprises a condenser lens (11) which converges laser beam and a light receiving unit (12) which receives the incident beam converged by the condenser lens. The light receiving element is formed, such that the light receiving portion thereof has an area of 2 mm2 or less and disposed at the side of the condenser lens than the point P where the beam is converged by the condenser lens and at the position more apart from the condenser lens than the position F of the focal distance of the condenser lens. As a consequence, a light receiving unit which detects the laser beam can be obtained, the light receiving unit enabling it possible to always receive the laser beam regardless of a little eccentricity of a laser source while the speed of response is raised.

摘要翻译： 光接收单元包括会聚激光束的聚光透镜（11）和接收由聚光透镜会聚的入射光束的光接收单元（12）。 光接收元件形成为使得其光接收部分具有2mm2或更小的面积，并且设置在聚光透镜的侧面，而不是聚焦透镜的光束会聚在点P处，并且位于更分开的位置 来自聚光透镜的聚焦透镜的焦距位置F. 结果，可以获得检测激光束的光接收单元，光接收单元能够始终接收激光束，而不管激光源的偏心程度如何，同时响应速度提高。

公开(公告)号：US5671305A

公开(公告)日：1997-09-23

申请号：US400514

申请日：1995-03-07

申请人： Haruo Tanaka ,  Naotaro Nakata

发明人： Haruo Tanaka ,  Naotaro Nakata

IPC分类号： G02B6/26 ,  G02B6/32 ,  G02B6/42

CPC分类号： G02B6/32 ,  G02B6/4246 ,  G02B6/4248

摘要： Disclosed is an optical branching and coupling device of high quality which is prevented from malfunction, corrosion and deterioration due to condensation on optical components incorporated therein by virtue of perfect sealing. The optical branching and coupling device including a housing provided with an aperture, optical instruments, associated with the housing, for branching, coupling, transmitting and receiving optical information input to the device, and an aspherical lens inserted into the aperture and fixed thereto by hermetic sealing with a glass material, the aspherical lens being adapted to connect at an end face thereof with at least one optical fiber.

摘要翻译： 公开了一种高质量的光分支和耦合装置，通过完美的密封，防止由于在其中组装的光学部件上的冷凝而发生故障，腐蚀和劣化。 光学分支和耦合装置包括设置有孔的壳体，与壳体相关联的光学仪器，用于分支，耦合，发射和接收输入到装置的光学信息，以及插入孔中的非球面透镜，并通过气密固定 用玻璃材料密封，非球面透镜适于在其端面处与至少一根光纤连接。

公开(公告)号：US5412509A

公开(公告)日：1995-05-02

申请号：US93927

申请日：1993-07-20

申请人： Naotaro Nakata ,  Kazutoshi Yamazaki

发明人： Naotaro Nakata ,  Kazutoshi Yamazaki

IPC分类号： H01S3/00 ,  G02B7/02 ,  H01S5/00 ,  H01S5/022 ,  H01S5/40

CPC分类号： G02B7/021

摘要： A semiconductor laser is inserted into a first hole of a fixing member. An optical system including a cylindrical lens barrel and a lens attached inside the lens barrel is inserted into a second hole in order to direct a light beam emitted from the semiconductor laser to a predetermined position. The first and second holes are formed to be opposite to each other and are arranged on the same axis. The semiconductor laser and the optical system inserted into the first and second holes, respectively, so as to be partly exposed are fixed by laser welding at entrances of the first and second holes. The fixing member is provided with a third hole vertically penetrating the second hole. An adhesive is filled into the third hole. Further, an adhesive is applied onto laser welding points at the entrance of the first hole.

摘要翻译： 将半导体激光器插入到固定构件的第一孔中。 将包括柱面透镜镜筒和安装在透镜镜筒内的透镜的光学系统插入到第二孔中，以将从半导体激光器发射的光束引导到预定位置。 第一和第二孔形成为彼此相对并且布置在同一轴线上。 通过在第一孔和第二孔的入口处的激光焊接固定分别插入第一孔和第二孔中以便部分暴露的半导体激光器和光学系统。 固定构件设有垂直贯穿第二孔的第三孔。 粘合剂填充到第三孔中。 此外，将粘合剂施加到第一孔的入口处的激光焊接点上。

公开(公告)号：US5052005A

公开(公告)日：1991-09-24

申请号：US452418

申请日：1989-12-19

申请人： Haruo Tanaka ,  Naotaro Nakata

发明人： Haruo Tanaka ,  Naotaro Nakata

IPC分类号： G11B7/125 ,  G11B7/22 ,  H01L31/167 ,  H01S5/00 ,  H01S5/022

CPC分类号： G11B7/127 ,  H01L31/167 ,  H01L33/00 ,  H01L2224/45124 ,  H01L2224/48091 ,  H01S5/02248 ,  H01S5/02276 ,  H01S5/0683

摘要： In an optical pick-up arranged to detect information recorded on an optical disk by causing laser light projected onto and reflected from a signal surface of the optical disk disposed within an optical system, to be received by a light receiving element provided in the optical system, a method of mounting onto the optical pick-up is provided with a laser diode unit which includes a metallic substrate, a laser diode, a photo-diode, a current feeding lead portion to the laser diode and a current output lead portion from the photo-diode, respectively disposed at one side face in the direction of thickness of the metallic substrate for emitting the laser light. The laser diode unit is positioned and fixed at a predetermined position of the optical system through a mounting member. The mounting method of the laser diode unit includes the steps of setting the other side face in the direction of thickness of the substrate and the mounting member in a desired positional relation for contact with each other. As a result, a plurality of contact places therebetween may be simultaneously welded by laser light for combining the laser diode unit and the optical pick-up into one unit.

公开(公告)号：US06335809B1

公开(公告)日：2002-01-01

申请号：US09647851

申请日：2000-10-03

申请人： Naotaro Nakata

发明人： Naotaro Nakata

IPC分类号： G02B532

CPC分类号： G11B7/1353 ,  G02B5/32 ,  G11B7/094 ,  G11B7/131

摘要： An optical pickup includes a hologram unit. The hologram unit includes a hologram pattern formed circular by dividing into two and then joining together first and second patterns formed in the entire circular region. The first pattern is designed to minimize a sub-beam spot on a light-receiving device based on an optical path length and wavelength when a +1-order sub-beam is taken as a light source. The second pattern is designed to minimize the sub-beam spot on the light-receiving device based on an optical path length and wavelength when a −1-order sub-beam is taken as a light source.

摘要翻译： 光拾取器包括全息图单元。 全息图单元包括通过分成两部分形成圆形的全息图图形，然后将形成在整个圆形区域中的第一和第二图案接合在一起。 第一图案被设计成当+ 1阶子束被用作光源时，基于光路长度和波长来最小化光接收装置上的子光束点。 第二图案被设计为当以-1级子光束作为光源时，基于光路长度和波长使光接收装置上的子光束点最小化。

公开(公告)号：US06320689B1

公开(公告)日：2001-11-20

申请号：US09369513

申请日：1999-08-06

申请人： Naotaro Nakata ,  Akihisa Yoshida

发明人： Naotaro Nakata ,  Akihisa Yoshida

IPC分类号： G02B2608

CPC分类号： G02B26/124 ,  G02B27/30

摘要： An optical system includes a semiconductor laser. The semiconductor laser is accommodated within a case. The case is formed with a window to pass through laser light emitted from the semiconductor laser. The laser light passed through the window comes to a collimator lens. Between semiconductor laser and the collimator lens is provided a light shield member having a pinhole to pass through the laser light having passed the window. Laser light made in a parallel luminous flux is outputted from the collimator lens. This laser light is deflected toward a main scanning direction by a deflector and further collected on a scanning surface by a light collector.

摘要翻译： 光学系统包括半导体激光器。 半导体激光器容纳在壳体内。 壳体形成有通过从半导体激光器发射的激光的窗口。 通过窗口的激光进入准直透镜。 在半导体激光器和准直透镜之间设置有具有针孔以穿过已经通过窗口的激光的遮光部件。 从准直透镜输出以平行光束形成的激光。 该激光通过偏转器朝向主扫描方向偏转，并通过集光器在扫描面上进一步收集。

公开(公告)号：US5499262A

公开(公告)日：1996-03-12

申请号：US22549

申请日：1993-02-25

申请人： Naotaro Nakata

发明人： Naotaro Nakata

IPC分类号： F21K99/00 ,  F21S2/00 ,  F21V5/04 ,  F21Y111/00 ,  G02B3/06 ,  G02B6/42 ,  G02B27/09 ,  H01S3/00 ,  H01S5/00 ,  H01S5/02 ,  H01S5/022 ,  H01S5/40 ,  H01S3/08

CPC分类号： G02B19/0014 ,  F21S9/02 ,  F21V5/04 ,  F21V5/043 ,  G02B19/0052 ,  G02B27/09 ,  G02B27/0966 ,  G02B3/06 ,  G02B6/4204 ,  F21Y2101/00 ,  F21Y2115/30

摘要： A rod lens or a cylindrical lens is disposed in front of a semiconductor laser to increase a divergence angle of a laser beam emitted from the semiconductor laser so as to form a substantially circular far field pattern. In another constitution, there is disposed in front of a semiconductor laser a composite lens having two cylindrical surfaces whose cylindrical axes are perpendicular to each other. The cylindrical surface on the side of the semiconductor laser is a convex surface and the other cylindrical surface is a convex or concave surface. In still another constitution, two semiconductor lasers emitting the same optical signal are arranged adjacent each other so that respective light emitting portions of two pn junction planes are located in the same plane and perpendicular to each other, and that laser beams form orthogonal spots at a single predetermined position.

摘要翻译： 棒状透镜或柱面透镜设置在半导体激光器的前面，以增加从半导体激光器发射的激光束的发散角度，从而形成大致圆形的远场图案。 在另一种结构中，在半导体激光器的前方设置有具有圆柱形轴线彼此垂直的两个圆柱面的复合透镜。 半导体激光器一侧的圆柱面是凸面，另一圆柱面是凸面或凹面。 在另一种结构中，发射相同光信号的两个半导体激光器彼此相邻布置，使得两个pn结面的各个发光部分位于相同的平面中并且彼此垂直，并且激光束在 单个预定位置。

公开(公告)号：US5477438A

公开(公告)日：1995-12-19

申请号：US31139

申请日：1993-03-12

申请人： Naotaro Nakata ,  Naofumi Aoki

发明人： Naotaro Nakata ,  Naofumi Aoki

IPC分类号： H01L33/58 ,  H01S5/00 ,  H01S5/40 ,  F21K7/00 ,  H01S3/08

CPC分类号： H01S5/4025

摘要： A light source unit of the present invention is provided with a plurality of semiconductor lasers each emitting one laser beam, a bar body to which the semiconductor lasers are attached so that p-n junctions planes of respective semiconductor lasers are arranged in the same direction, and a beam restricting plate where holes for passing a part of the beam from the semiconductor laser are formed so as to correspond to the semiconductor lasers. With this feature, a plurality of laser beams of uniform optical power can be emitted at predetermined spaces.

摘要翻译： 本发明的光源单元设置有多个半导体激光器，每个半导体激光器发射一个激光束，连接有半导体激光器的条形体，使得各个半导体激光器的pn结平面布置在相同的方向，并且 用于使来自半导体激光器的光束的一部分通过的孔的光束限制板形成为对应于半导体激光器。 利用该特征，可以在预定空间发射多个具有均匀光功率的激光束。