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36 条记录 (耗时 0.026 秒)

    Polarization optical element
    2.
    发明授权
    Polarization optical element 失效
    极化光学元件

    公开(公告)号：US5748368A

    公开(公告)日：1998-05-05

    申请号：US576686

    申请日：1995-12-21

    申请人： Hitoshi Tamada ,  Shuichi Matsumoto ,  Noriaki Nishi ,  Kimihiro Saito

    发明人： Hitoshi Tamada ,  Shuichi Matsumoto ,  Noriaki Nishi ,  Kimihiro Saito

    IPC分类号： G02B5/30

    CPC分类号： G02B5/3058

    摘要： A polarization optical element causes minimum loss and provides light in the visible and near-infrared regions with practically satisfactory polarization contrast even when the grid period is comparatively long. Metal grids 1 are formed on a substrate 2 with a refractive index n.sub.1 to satisfy conditions 0.2

    摘要翻译： 偏振光学元件造成最小的损失，并且即使在电网周期比较长的时候，也可以在可见光和近红外区域提供实际令人满意的偏振对比度的光。 金属栅格1形成在折射率为n1的基片2上，以满足条件0.2

    Optical communications apparatus and method
    3.
    发明授权
    Optical communications apparatus and method 失效
    光通信装置及方法

    公开(公告)号：US06282006B1

    公开(公告)日：2001-08-28

    申请号：US09109388

    申请日：1998-07-02

    申请人： Hitoshi Tamada ,  Shuichi Matsumoto ,  Takashi Yamaguchi

    发明人： Hitoshi Tamada ,  Shuichi Matsumoto ,  Takashi Yamaguchi

    IPC分类号： H04B1012

    CPC分类号： H04B10/43 ,  G02B6/4214 ,  G02B6/4246

    摘要： An optical communications apparatus and method of using same in which optical coupling between an optical medium and a light emitter and a light receptor is achieved without any optical system therebetween. A minor axis of light transmission pattern on an end face of the optical fiber corresponds to the radial direction of the end face while a center C of the light emitter is displaced off from a center axis O, thereby providing improved optical coupling efficiencies.

    摘要翻译： 实现其中光学介质与光发射器与光接收器之间的光耦合的光通信装置及其使用方法，其间没有任何光学系统。 光纤端面上的光传输图案的短轴对应于端面的径向，而发光体的中心C从中心轴线O偏离，从而提供改善的光耦合效率。

    Electro-optical element, and method of driving and method of manufacturing the same
    5.
    发明授权
    Electro-optical element, and method of driving and method of manufacturing the same 失效
    电光元件及其驱动方法及其制造方法

    公开(公告)号：US06411420B1

    公开(公告)日：2002-06-25

    申请号：US09424443

    申请日：2000-03-14

    申请人： Masahiro Yamada ,  Toru Domuki ,  Hitoshi Tamada

    发明人： Masahiro Yamada ,  Toru Domuki ,  Hitoshi Tamada

    IPC分类号： G02F103

    CPC分类号： G02F1/03 ,  G02F1/3558

    摘要： Polarization inversion domains 2 are irregularly formed in a ferroelectric substrate 3 constituting an electro-optical element 1 at least in the propagation direction of a light beam A. An A.C. current signal is applied between electrodes 4 and 5. It is thereby arranged to disturb the phase of each of the light rays constituting a light beam whose coherent characteristic is high, such as a laser light or the like, and thereby to easily obtain the light beam whose coherent characteristic has been decreased.

    摘要翻译： 极化反转畴2至少在光束A的传播方向上构成电光元件1的铁电衬底3中不规则地形成。在电极4和5之间施加AC电流信号。由此， 构成相干特性高的光束（例如激光等）的每个光线的相位，从而容易地获得其相干特性已经降低的光束。

    Optical waveguide device and second harmonic generator using the same
    6.
    发明授权
    Optical waveguide device and second harmonic generator using the same 失效
    光波导器件和二次谐波发生器使用相同

    公开(公告)号：US5459807A

    公开(公告)日：1995-10-17

    申请号：US193523

    申请日：1994-02-08

    申请人： Tohru Doumuki ,  Hitoshi Tamada ,  Masaki Saitoh

    发明人： Tohru Doumuki ,  Hitoshi Tamada ,  Masaki Saitoh

    IPC分类号： G02B6/12 ,  G02B6/136 ,  G02F1/377

    CPC分类号： G02B6/136 ,  G02F1/377 ,  G02B2006/12054 ,  G02B2006/12097

    摘要： An optical waveguide device for use as a second harmonic generator includes a nonlinear optical crystalline substrate of KTiOPO.sub.4 and an optical waveguide core of a dielectric material, such as Ta.sub.2 O.sub.5, disposed on the nonlinear optical crystalline substrate. The optical waveguide converts a fundamental wave having a wavelength .lambda. which is guided through the optical waveguide into a second harmonic wave having a wavelength .lambda./2, the second harmonic wave having the same polarization as the fundamental wave which is guided through the optical waveguide. The optical waveguide has a thickness of 190 nm or greater. The optical waveguide device also has a dielectric loaded strip disposed on the optical waveguide core. The dielectric loaded strip may be made of SiO.sub.2 or SiO.sub.2 doped with Ta.sub.2 O.sub.5. Alternatively, the optical waveguide may be a ridge-type optical waveguide, and the optical waveguide device may also has a cladding layer disposed on the nonlinear optical crystalline substrate and the optical waveguide core.

    摘要翻译： 用作二次谐波发生器的光波导器件包括设置在非线性光学晶体衬底上的KTiOPO4的非线性光学晶体衬底和诸如T​​a 2 O 5的介电材料的光波导芯。 光波导将具有通过光波导引导的波长λ的基波转换成具有波长λ/ 2的二次谐波，二次谐波具有与通过光波导引导的基波相同的偏振。 光波导的厚度为190nm以上。 光波导器件还具有设置在光波导芯上的介质负载条。 介电负载带可以由掺杂有Ta 2 O 5的SiO 2或SiO 2制成。 或者，光波导可以是脊型光波导，并且光波导器件也可以具有设置在非线性光学晶体基板和光波导芯上的包层。

    Optical modulation device and image display apparatus using the same
    8.
    发明授权
    Optical modulation device and image display apparatus using the same 失效
    光调制装置及使用其的图像显示装置

    公开(公告)号：US07369289B2

    公开(公告)日：2008-05-06

    申请号：US10864535

    申请日：2004-06-10

    申请人： Hitoshi Tamada ,  Ayumu Taguchi

    发明人： Hitoshi Tamada ,  Ayumu Taguchi

    IPC分类号： G02B26/00 ,  G02F1/00 ,  G02F1/01 ,  G02F1/03 ,  G02F1/153 ,  G02F1/07

    CPC分类号： G02B26/0808

    摘要： An optical modulation device is disclosed which can suppress production of a cause of degradation such as a void or hillock on a light illumination surface thereof and can be incorporated in an image display apparatus of a small size and a high luminance to improve the reliability of the same. The optical modulation device includes first and second surface elements movable relative to each other to form different diffraction gratings to modulate light inputted thereto. Each of the first and second surface elements has a light illumination surface made of an AlCu alloy material. The optical modulation device has an airtight sealed space in which surrounding gas for the first and second surface elements is encapsulated. The surrounding gas contains hydrogen gas or helium gas or both of hydrogen gas and helium gas.

    摘要翻译： 公开了一种光调制装置，其可以抑制其光照射面上的空隙或小丘等劣化的产生，并且可以结合在小尺寸和高亮度的图像显示装置中，以提高其可靠性 相同。 光调制装置包括可相对于彼此移动的第一和第二表面元件，以形成不同的衍射光栅，以调制输入到其中的光。 第一和第二表面元件中的每一个具有由AlCu合金材料制成的光照明表面。 光调制装置具有气密密封空间，其中密封有用于第一和第二表面元件的周围气体。 周围的气体含有氢气或氦气，或氢气和氦气两者。