公开(公告)号：US20060285125A1

公开(公告)日：2006-12-21

申请号：US11425005

申请日：2006-06-19

申请人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa

发明人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa

IPC分类号： G01B9/02

CPC分类号： G01J9/0246

摘要： A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second two-divided detectors has two detectors arranged in the direction of which the interference fringes appear. Each of the detectors detects an amount of light of the interference fringes. These two-divided detectors are spaced apart for an odd-number multiple of nearly ¼ period of interference fringes and disposed on a plane perpendicular to an optical path of the interference fringes. Each of first and second calculation sections calculates a first difference signal of detection signals of two detectors of the two-divided detector. A selection section selects one of the first and second difference signals. A determination section determines a wavelength of the laser light corresponding to a value of the difference signal selected from the first and second difference signals.

摘要翻译： 公开了一种激光装置。 光学元件接收从激光发生源发射的至少一部分激光，并产生干涉条纹。 第一和第二二分割检测器中的每一个具有布置在干涉条纹出现的方向上的两个检测器。 每个检测器检测干涉条纹的光量。 这两个分开的检测器间隔开几个1/4的干涉条纹的奇数倍，并设置在与干涉条纹的光路垂直的平面上。 第一和第二计算部分中的每一个计算双分割检测器的两个检测器的检测信号的第一差分信号。 选择部分选择第一和第二差分信号之一。 确定部分确定与从第一和第二差分信号中选择的差分信号的值相对应的激光的波长。

公开(公告)号：US20080180659A1

公开(公告)日：2008-07-31

申请号：US11742800

申请日：2007-05-01

申请人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa ,  Shinji Yamada ,  Katsuhiro Agatsuma

发明人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa ,  Shinji Yamada ,  Katsuhiro Agatsuma

IPC分类号： G01J3/00

CPC分类号： G01J9/00 ,  G01J9/0246 ,  G01J2009/0234 ,  H01S5/0014 ,  H01S5/0071 ,  H01S5/0612 ,  H01S5/0654 ,  H01S5/141 ,  H01S5/143

摘要： A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.

摘要翻译： 激光系统包括以多模振荡并具有其振荡波长随温度变化的特性的激光二极管，接收从激光二极管发射的光束并将衍射光束返回到激光二极管的光栅，机构 其改变了返回到激光二极管的衍射光束的波长，检测与返回到激光二极管的衍射光束相同的输出光束的波长的波长检测器，将激光二极管保持在 以及控制单元，其控制机构，使得具有预定波长的输出光束被输出并控制温度调节器，使得激光二极管以预定波长振荡。

公开(公告)号：US07580433B2

公开(公告)日：2009-08-25

申请号：US11742800

申请日：2007-05-01

申请人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa ,  Shinji Yamada ,  Katsuhiro Agatsuma

发明人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa ,  Shinji Yamada ,  Katsuhiro Agatsuma

IPC分类号： H01S3/04

CPC分类号： G01J9/00 ,  G01J9/0246 ,  G01J2009/0234 ,  H01S5/0014 ,  H01S5/0071 ,  H01S5/0612 ,  H01S5/0654 ,  H01S5/141 ,  H01S5/143

摘要： A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.

摘要翻译： 激光系统包括以多模振荡并具有其振荡波长随温度变化的特性的激光二极管，接收从激光二极管发射的光束并将衍射光束返回到激光二极管的光栅，机构 其改变了返回到激光二极管的衍射光束的波长，检测与返回到激光二极管的衍射光束相同的输出光束的波长的波长检测器，将激光二极管保持在 以及控制单元，其控制机构，使得具有预定波长的输出光束被输出并控制温度调节器，使得激光二极管以预定波长振荡。

公开(公告)号：US07426222B2

公开(公告)日：2008-09-16

申请号：US11425005

申请日：2006-06-19

申请人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa

发明人： Tomiji Tanaka ,  Kageyasu Sako ,  Ryo Kasegawa

IPC分类号： H01S5/0683 ,  H01S5/14

CPC分类号： G01J9/0246

摘要： A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second two-divided detectors has two detectors arranged in the direction of which the interference fringes appear. Each of the detectors detects an amount of light of the interference fringes. These two-divided detectors are spaced apart for an odd-number multiple of nearly ¼ period of interference fringes and disposed on a plane perpendicular to an optical path of the interference fringes. Each of first and second calculation sections calculates a first difference signal of detection signals of two detectors of the two-divided detector. A selection section selects one of the first and second difference signals. A determination section determines a wavelength of the laser light corresponding to a value of the difference signal selected from the first and second difference signals.

摘要翻译： 公开了一种激光装置。 光学元件接收从激光发生源发射的至少一部分激光，并产生干涉条纹。 第一和第二二分割检测器中的每一个具有布置在干涉条纹出现的方向上的两个检测器。 每个检测器检测干涉条纹的光量。 这两个分开的检测器间隔开几个1/4的干涉条纹的奇数倍，并设置在与干涉条纹的光路垂直的平面上。 第一和第二计算部分中的每一个计算双分割检测器的两个检测器的检测信号的第一差分信号。 选择部分选择第一和第二差分信号之一。 确定部分确定与从第一和第二差分信号中选择的差分信号的值相对应的激光的波长。

公开(公告)号：US07889407B2

公开(公告)日：2011-02-15

申请号：US11824518

申请日：2007-06-29

申请人： Kageyasu Sako ,  Tomiji Tanaka

发明人： Kageyasu Sako ,  Tomiji Tanaka

IPC分类号： G03H1/02 ,  G03H1/12 ,  G03H1/04 ,  G03F7/00

CPC分类号： G03H1/0486 ,  G03H1/202 ,  G03H2001/0296 ,  G11B7/0065 ,  G11B7/261

摘要： An apparatus for producing a duplicate hologram recording medium includes: a positioning section configured to place the duplication master and the duplicate hologram recording medium at predetermined relative positions; an angle selective plate arranged between the duplication master and the duplicate hologram recording medium, the angle selective plate having an angle selective film whose transmittance changes in accordance with an incidence angle of a light beam; and a duplicating-reference-beam generating and radiating section generating a duplicating reference beam, and radiating the duplicating reference beam at such an incidence angle that the duplicating reference beam is transmitted through a predetermined region of a recording layer of the duplication master and is reflected by the angle selective film.

摘要翻译： 一种重复全息图记录介质的制造装置，其特征在于，具备：将复制主体和复制全息图记录介质配置在规定的相对位置的定位部， 布置在复制主体和复制全息图记录介质之间的角度选择板，所述角度选择板具有根据光束的入射角而透射率变化的角度选择膜; 以及生成复制参考光束的复制参考光束产生和辐射部分，并且以复制参考光束通过复制主记录的记录层的预定区域传播的入射角辐射复制参考光束，并被反射 通过角度选择膜。

公开(公告)号：US20080037088A1

公开(公告)日：2008-02-14

申请号：US11824518

申请日：2007-06-29

申请人： Kageyasu Sako ,  Tomiji Tanaka

发明人： Kageyasu Sako ,  Tomiji Tanaka

IPC分类号： G03H1/04

CPC分类号： G03H1/0486 ,  G03H1/202 ,  G03H2001/0296 ,  G11B7/0065 ,  G11B7/261

摘要： An apparatus for producing a duplicate hologram recording medium includes: a positioning section configured to place the duplication master and the duplicate hologram recording medium at predetermined relative positions; an angle selective plate arranged between the duplication master and the duplicate hologram recording medium, the angle selective plate having an angle selective film whose transmittance changes in accordance with an incidence angle of a light beam; and a duplicating-reference-beam generating and radiating section generating a duplicating reference beam, and radiating the duplicating reference beam at such an incidence angle that the duplicating reference beam is transmitted through a predetermined region of a recording layer of the duplication master and is reflected by the angle selective film.

摘要翻译： 一种重复全息图记录介质的制造装置，其特征在于，具备：将复制主体和复制全息图记录介质配置在规定的相对位置的定位部， 布置在复制主体和复制全息图记录介质之间的角度选择板，所述角度选择板具有根据光束的入射角而透射率变化的角度选择膜; 以及生成复制参考光束的复制参考光束产生和辐射部分，并且以复制参考光束通过复制主记录的记录层的预定区域传播的入射角辐射复制参考光束，并被反射 通过角度选择膜。

公开(公告)号：US07729400B2

公开(公告)日：2010-06-01

申请号：US10579903

申请日：2004-11-30

申请人： Tomiji Tanaka ,  Kazuo Takahashi ,  Motonobu Takeya

发明人： Tomiji Tanaka ,  Kazuo Takahashi ,  Motonobu Takeya

IPC分类号： H01S5/18 ,  H01S5/16

CPC分类号： H01S5/141 ,  H01S5/02212 ,  H01S5/02248 ,  H01S5/02296 ,  H01S5/02415 ,  H01S5/02438 ,  H01S5/0655 ,  H01S5/2219 ,  H01S5/32341

摘要： An external cavity type semiconductor laser that has a larger output and a more excellent single mode characteristic than a conventional external cavity type semiconductor laser is provided. The external cavity type semiconductor laser has a laser diode 11, a window glass 16, a grating, and a lens. The external cavity type semiconductor laser has several modifications over the conventional one. A first modification is that the window glass 16 is inclined to a beam emission surface 19 of a laser diode 11 for a predetermined angle. A second modification is that arrangements of the laser diode 11 and so forth are adjusted so that a S wave reaches the grating. A third modification is that when an output power of the laser diode 11 is 45 mW or less, a kink is suppressed. The other modifications are that a reflectance of a beam emission surface of the laser diode 11, a numerical aperture of the lens, an external cavity length, and a reflectance of a first order beam of the grating are optimized to their proper values.

摘要翻译： 提供具有比常规的外腔型半导体激光器更大的输出和更优异的单模特性的外腔型半导体激光器。 外腔型半导体激光器具有激光二极管11，窗玻璃16，光栅和透镜。 外腔型半导体激光器与常规半导体激光器相比有若干种修改。 第一修改是窗玻璃16以预定角度倾斜于激光二极管11的光束发射表面19。 第二修改是调整激光二极管11等的配置，使得S波到达光栅。 第三变形例是当激光二极管11的输出功率为45mW以下时，抑制了扭结。 其他修改是将激光二极管11的光束发射表面的反射率，透镜的数值孔径，外部空腔长度和光栅的一阶光束的反射率优化为其适当的值。

公开(公告)号：US20090316239A1

公开(公告)日：2009-12-24

申请号：US12475098

申请日：2009-05-29

申请人： Hitoshi OKADA ,  Masaaki Hara ,  Satoru Seko ,  Tomiji Tanaka ,  Yoshiki Okamoto

发明人： Hitoshi OKADA ,  Masaaki Hara ,  Satoru Seko ,  Tomiji Tanaka ,  Yoshiki Okamoto

IPC分类号： G03H1/08

CPC分类号： G11B7/00781 ,  G11B7/0065

摘要： A recording apparatus includes a drive unit that rotationally drives a holographic recording medium including a recording layer and a track forming layer that includes guide tracks formed at constant intervals in a radial direction, where a signal beam and a reference beam are emitted to the recording layer so that a hologram is recorded in accordance with the signal beam, a signal beam generating unit, a reference beam generating unit, a recording unit that emits the signal beam and reference beam into the medium and records the hologram, a rotation control unit that controls the drive unit so that the medium is rotationally driven at a constant rotation speed, and a recording control unit that selects some of the guide tracks so that radial-direction recording intervals of the holograms are statistically decreased towards the outer periphery and controls the recording unit to record the holograms along the selected tracks.

摘要翻译： 记录装置包括：驱动单元，其旋转地驱动包括记录层的全息记录介质和轨道形成层，该轨道形成层包括沿径向恒定间隔形成的导轨，其中信号光束和参考光束被发射到记录层 使得根据信号束记录全息图，信号光束产生单元，参考光束产生单元，将信号光束和参考光束发射到介质中并记录全息图的记录单元，控制旋转控制单元 所述驱动单元使得所述介质以恒定的旋转速度被旋转地驱动;以及记录控制单元，其选择一些所述导轨，使得所述全息图的径向记录间隔向外周界统计地减小，并且控制所述记录单元 沿所选轨道记录全息图。

公开(公告)号：US20080198432A1

公开(公告)日：2008-08-21

申请号：US12032536

申请日：2008-02-15

申请人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

发明人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

IPC分类号： G03H1/22 ,  G02F1/137

CPC分类号： G11B7/1362 ,  G03H1/22 ,  G03H1/265 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/0065 ,  G11B7/1369

摘要： A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source so that a hologram recording medium is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the hologram recording medium by irradiation with the first reference light, to a light receiving element having a plurality of pixels; and a second reference light path leading second reference light, having the same polarization direction as that of the diffracted light, from the laser light source to the light receiving element. The second reference light path is provided with a phase modulating element so that the phase difference between the diffracted light and the second reference light in a light receiving surface of the light receiving element is adjusted within a predetermined range.

摘要翻译： 全息图再现装置包括：第一参考光路，其引导来自激光光源的激光，使得全息图记录介质用第一参考光照射; 通过照射第一参考光从全息图记录介质产生的衍射光的衍射光路到具有多个像素的光接收元件; 以及第二参考光路，其将具有与衍射光的偏振方向相同的偏振方向的第二参考光从激光光源引导到光接收元件。 第二参考光路设置有相位调制元件，使得光接收元件的光接收表面中的衍射光和第二参考光之间的相位差被调节在预定范围内。

公开(公告)号：US4878132A

公开(公告)日：1989-10-31

申请号：US184783

申请日：1988-04-22

申请人： Katsuhisa Aratani ,  Ariyoshi Nakaoki ,  Tomiji Tanaka

发明人： Katsuhisa Aratani ,  Ariyoshi Nakaoki ,  Tomiji Tanaka

IPC分类号： G11B11/105

CPC分类号： G11B11/10519 ,  G11B11/10506 ,  G11B11/10591 ,  Y10S428/928 ,  Y10T428/12632 ,  Y10T428/12951

摘要： A thermomagnetic recording method is disclosed using a thermomagnetic recording medium where first, second and third magnetic thin films each formed of rare-earth and transition metals are sequentially superposed to form layers in a magnetically coupled manner. The recording is carried out by heating the thermomagnetic recording medium under a predetermined magnetic field perpendicular to the film plane thereof while selectively modulating, in accordance with data to be recorded, a first heating state at a first temperature T1 substantially above the Curie point Tc1 of the first magnetic thin film and adequate to hold the sublattice magnetization of the transition metal of the second magnetic thin film in a predetermined direction, and a second heating state at a second temperature T2 substantially above the Curie point Tc1 and adequate to invert the sublattice magnetization of the transition metal of the second magnetic thin film to the reverse of the predetermined direction. In a cooling step subsequent to the first and second heating states, maintaining the sublattice magnetization of the third magnetic thin film in a predetermined direction while orienting the sublattice magnetization of said second magnetic thin film to be directionally coincident with that of the third magnetic thin film at a temperature below the first temperature T1 without directionally inverting the sublattice magnetization of the first magnetic thin film.