公开(公告)号：US4759030A

公开(公告)日：1988-07-19

申请号：US870948

申请日：1986-06-05

申请人： Yoshimasa Murayama ,  Yasutsugu Takeda ,  Michiharu Nakamura ,  Yasuhiro Shiraki ,  Yoshifumi Katayama ,  Naoki Chinone

发明人： Yoshimasa Murayama ,  Yasutsugu Takeda ,  Michiharu Nakamura ,  Yasuhiro Shiraki ,  Yoshifumi Katayama ,  Naoki Chinone

IPC分类号： H01S5/00 ,  H01S5/042 ,  H01S5/06 ,  H01S5/34 ,  H01S3/19

CPC分类号： B82Y20/00 ,  H01S5/34 ,  H01S5/0425

摘要： A semiconductor laser having high efficiency of luminescence can be obtained by forming a spatial fluctuation of potential so that the potential differs from position to position inside a plane perpendicular to a current flowing direction and electrons and holes or excitons formed by a combination of them can be localized not only in the current flowing direction but also inside the plane perpendicular to the current flowing direction. More definitely, corrugations or ruggedness having a mean pitch of below 100 nm and a level difference of from 1/10 to 1/2 of the mean thickness of an active layer are formed on the surface of the active layer of the semiconductor laser.

摘要翻译： 具有高发光效率的半导体激光器可以通过形成电位的空间波动使得电位在与电流流动方向垂直的平面内的位置不同，并且由它们的组合形成的电子和空穴或激子可以是 不仅在当前的流动方向上而且在垂直于电流流动方向的平面内。 更确定地，在半导体激光器的有源层的表面上形成具有低于100nm的平均间距的波纹或粗糙度以及有源层的平均厚度的1/10至1/2的水平差。

公开(公告)号：US4051528A

公开(公告)日：1977-09-27

申请号：US661806

申请日：1976-02-26

申请人： Yasutsugu Takeda ,  Hisashi Nakamura ,  Yoshito Tsunoda ,  Toshihisa Tsukada ,  Toshimitsu Miyauchi

发明人： Yasutsugu Takeda ,  Hisashi Nakamura ,  Yoshito Tsunoda ,  Toshihisa Tsukada ,  Toshimitsu Miyauchi

IPC分类号： H04N5/85 ,  G02B27/00 ,  G11B7/09 ,  G11B7/095 ,  G11B7/12 ,  G11B7/125 ,  G11B7/128 ,  G11B7/135 ,  H04N5/86

CPC分类号： G11B7/128 ,  G11B7/095 ,  G11B7/12 ,  Y10S250/909

摘要： Optical information reconstructing apparatus comprising a disc having at least one surface on which groups of dots bearing information are concentrically or spirally arrayed, a mechanism for rotating the disc, a light source for projecting a light beam on the array of groups of dots, and at least one photodetector for detecting diffracted light waves from the groups of dots, characterized in that a semiconductor laser array is used as the light source and that the light emission is switched from one laser source to another in the laser array in tracking the information.

公开(公告)号：US4037919A

公开(公告)日：1977-07-26

申请号：US576460

申请日：1975-05-12

申请人： Yasutsugu Takeda ,  Yoshito Tsunoda

发明人： Yasutsugu Takeda ,  Yoshito Tsunoda

IPC分类号： G03H1/00 ,  G03H1/16 ,  G03H1/30

CPC分类号： G03H1/00

摘要： A holographic device comprises a film for displaying a three-dimensional object as images, each of which is obtained as viewed in a respective one of a plurality of different directions, a phase plate for providing a light beam for illuminating each of said images of the film with an additional phase at random, a sampling grating for dividing a light beam from the phase plate into a plurality of small groups of light beams, a photosensitive material, and a slit for simultaneously radiating said light beam and a light beam having coherency therewith on each position of said photosensitive material in succession.

公开(公告)号：US4021606A

公开(公告)日：1977-05-03

申请号：US562394

申请日：1975-03-27

申请人： Yasutsugu Takeda ,  Yoshito Tsunoda ,  Fumio Imagawa ,  Keiji Kataoka ,  Kimio Tatsuno

发明人： Yasutsugu Takeda ,  Yoshito Tsunoda ,  Fumio Imagawa ,  Keiji Kataoka ,  Kimio Tatsuno

IPC分类号： H04N5/91 ,  G03H1/00 ,  G03H1/04 ,  G03H1/22 ,  G03H1/26 ,  G11B7/00 ,  G11B7/0065 ,  H04N5/76 ,  H04N5/89 ,  G03H1/30 ,  H04N5/86

CPC分类号： G11B7/0065 ,  G03H1/30 ,  H04N5/7605 ,  H04N5/90 ,  G03H1/0236 ,  G03H1/16 ,  G03H2001/0204 ,  G03H2210/20 ,  G03H2230/10 ,  G03H2270/22

摘要： A hologram apparatus comprises a rotary plane with a plurality of holograms concentrically or spirally arranged thereon, a light emitting source, and at least one photodetector for reading out reconstructed images of the holograms. During rotation of the rotary plane, the optical path of a light beam from the light emitting source is controlled, whereby the reconstructed images from the respective holograms are focused on the photodetector in succession. Some or all of the holograms are substantially oblong, and the long side and the short side of each oblong extend radially about the axis of the rotary plane and substantially orthogonally to the radial direction respectively.

摘要翻译： 全息图装置包括具有同心或螺旋地布置在其上的多个全息图的旋转平面，发光源和用于读出全息图的重建图像的至少一个光电检测器。 在旋转平面的旋转期间，控制来自发光源的光束的光路，由此来自各个全息图的重建图像被连续地聚焦在光电检测器上。 一些或全部全息图基本上是长方形的，并且每个长方形的长边和短边分别围绕旋转平面的轴线径向延伸并且基本上与径向基本正交。

公开(公告)号：US3937554A

公开(公告)日：1976-02-10

申请号：US400725

申请日：1973-09-26

申请人： Yoshito Tsunoda ,  Yasutsugu Takeda

发明人： Yoshito Tsunoda ,  Yasutsugu Takeda

IPC分类号： H01S3/10 ,  G03H1/02 ,  G03H1/04 ,  G03H1/22 ,  G03H1/24 ,  G03H1/28

CPC分类号： G03H1/24 ,  G03H1/02 ,  G03H1/22 ,  G03H1/28 ,  G03H1/0256 ,  G03H1/182 ,  G03H1/2286 ,  G03H2001/0264 ,  G03H2001/2223 ,  G03H2001/2263 ,  G03H2222/18 ,  G03H2222/24 ,  G03H2260/10

摘要： A hologram device carrying at least one hologram on a light sensitive medium in which the part of the light sensitive medium which carries the hologram thereon is impregnated with a laser active material.

摘要翻译： 在光敏介质上携带至少一个全息图的全息装置，其中携带全息图的光敏介质的一部分用激光活性材料浸渍。