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72 条记录 (耗时 0.048 秒)

    OPTICAL LOW PASS FILTER
    61.
    发明申请
    OPTICAL LOW PASS FILTER 失效
    光学低通滤波器

    公开(公告)号：US20110149386A1

    公开(公告)日：2011-06-23

    申请号：US13034729

    申请日：2011-02-25

    申请人： Hirotoshi YABUMOTO ,  Koichi Murata

    发明人： Hirotoshi YABUMOTO ,  Koichi Murata

    IPC分类号： G02B5/30 ,  G02B27/28

    CPC分类号： G03B11/00 ,  G02B5/3083 ,  G02B27/28 ,  G02B27/46

    摘要： The present invention relates to a low pass filter including a wave plate capable of modulating incident light serving as image information such that A-polarized light and B-polarized light orthogonal to the A-polarized light are at an equivalent light quantity level over a visible light region, i.e., a transmittance takes a value close to 50%. According to the low pass filter of the present invention, it is possible to appropriately reduce a moiré phenomenon generated by an image sensor constituting the optical low pass filter including the above-described wave plate, and suppress degradation of an image quality caused by light quantity deflection of a separated light beam, and the low pass filter of the present invention is therefore useful.

    摘要翻译： 低通滤波器技术领域本发明涉及一种低通滤波器，其包括能够调制作为图像信息的入射光的波片，使得与A偏振光正交的A偏振光和B偏振光在可见光之上处于等效光量水平 光区域，即透射率接近50％。 根据本发明的低通滤波器，可以适当地减少构成包括上述波片的光学低通滤波器的图像传感器产生的波纹现象，并且抑制由光量引起的图像质量的劣化 因此，本发明的分离光束的偏转和低通滤波器是有用的。

    Optical head apparatus
    62.
    发明授权
    Optical head apparatus 失效
    光头设备

    公开(公告)号：US07835252B2

    公开(公告)日：2010-11-16

    申请号：US11734535

    申请日：2007-04-12

    申请人： Koichi Murata ,  Yoshiharu Ooi

    发明人： Koichi Murata ,  Yoshiharu Ooi

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B5/1828 ,  G02F1/1313 ,  G02F1/292 ,  G11B7/1369 ,  G11B2007/0006

    摘要： An optical head apparatus includes a light source and an objective lens focusing a light source light on an optical recording medium. Also included is a light detector receiving a return light, and a variable diffraction device including a first polarized light diffraction grating; and a second polarized light diffraction grating. Provided that a polarizing direction diffracted by the first polarized light diffraction grating is defined as a first polarizing direction and a polarizing direction that is orthogonal to the first polarizing direction and not diffracted by the first polarized light diffraction grating is defined as a second polarizing direction, a ratio obtained from dividing a diffraction efficiency in the second polarizing direction by a diffraction efficiency in the first polarizing direction, of the first polarized light diffraction grating, is 0 to 0.5, and a ratio obtained from dividing a diffraction efficiency in the first polarizing direction by a diffraction efficiency in the second polarizing direction, of the second polarized light diffraction grating, is 0 to 0.5.

    摘要翻译： 光学头装置包括光源和将光源光聚焦在光学记录介质上的物镜。 还包括接收返回光的光检测器和包括第一偏振光衍射光栅的可变衍射装置; 和第二偏振光衍射光栅。 如果将由第一偏振光衍射光栅衍射的偏振方向定义为第一偏振方向，并将与第一偏振光衍射光栅不衍射的与第一偏振方向正交的偏振方向定义为第二偏振方向， 从第二偏振方向的衍射效率除以第一偏振光衍射光栅的第一偏振方向的衍射效率得到的比例为0〜0.5，并且从第一偏振方向的衍射效率 通过第二偏振光衍射光栅的第二偏振方向的衍射效率为0〜0.5。

    PHASE DIFFERENCE ELEMENT AND OPTICAL HEAD APPARATUS
    64.
    发明申请
    PHASE DIFFERENCE ELEMENT AND OPTICAL HEAD APPARATUS 审中-公开
    相差元件和光头设备

    公开(公告)号：US20100128593A1

    公开(公告)日：2010-05-27

    申请号：US12694548

    申请日：2010-01-27

    申请人： Koichi Murata ,  Toshimasa Kakiuchi

    发明人： Koichi Murata ,  Toshimasa Kakiuchi

    IPC分类号： G11B7/135 ,  G02B27/28

    CPC分类号： G11B7/1369 ,  G02B5/3083 ,  G11B7/1365 ,  G11B2007/0006

    摘要： Three phase difference layers having refractive index anisotropy are stacked in parallel and an optic axis angle and retardation of each of the phase difference layers are adjusted and thereby, characteristics having peaks at which ellipticity is approximated to 1 at desired three design wavelengths can be obtained and it can efficiently be adapted to an optical head apparatus for converting linear polarization of a light source with, for example, three different wavelengths into circular polarization.

    摘要翻译： 具有折射率各向异性的三个相位差层并联堆叠，并且调整每个相位差层的光轴角度和延迟，从而可以获得在期望的三个设计波长处的椭圆率近似为1的具有峰值的特性， 它可以有效地适用于将例如三种不同波长的光源的线性偏振转换为圆偏振的光学头装置。

    OPTICAL COMPONENT FOR LASER BEAM
    66.
    发明申请
    OPTICAL COMPONENT FOR LASER BEAM 审中-公开
    激光束光学元件

    公开(公告)号：US20090110011A1

    公开(公告)日：2009-04-30

    申请号：US12343963

    申请日：2008-12-24

    申请人： Yasuhisa NISHIKAWA ,  Koichi Murata

    发明人： Yasuhisa NISHIKAWA ,  Koichi Murata

    IPC分类号： H01S3/098

    CPC分类号： G11B7/1275 ,  G02B5/32 ,  G11B7/1353 ,  G11B2007/0006

    摘要： The present invention is to suppress deterioration of durability at the time when an optical component using a material optimized to be used in an optical path of a laser beam for performing reproduction/recording for a CD and a DVD is used in an optical head device using light sources including a blue semiconductor laser. A first transparent substrate 1 and a second transparent substrate 2 sandwich and hold therebetween a concave-convex portion 5 comprising a polymer liquid crystal, a filling adhesive 7 for filling the concave-convex, and a phase plate 6 having a retardation corresponding to ¼ of a wavelength used. An inorganic optical multilayer film 3 is formed on the whole surface of the first transparent substrate 1, on the side opposite to the concave-convex portion 5, and an inorganic optical multilayer film 4 is formed on the whole surface of the second transparent substrate 2, on the side opposite to the concave-convex portion 5. The formation of the optical multilayer film 4 reduces the intensity of light of 400 to 410 nm which enters the second transparent substrate 2 to 20% or less of that of light which enters the optical multilayer film.

    摘要翻译： 本发明是为了抑制使用使用优化用于在用于CD和DVD的再现/记录的激光束的光路中使用的材料的光学部件在使用光学头装置时使用耐久性的劣化 包括蓝色半导体激光器的光源。 第一透明基板1和第二透明基板2夹持并保持在其间，包括聚合物液晶的凹凸部5，用于填充凹凸的填充粘合剂7和相位差为相当于1/4的相位差 使用的波长。 无机光学多层膜3形成在第一透明基板1的与凹凸部5相反的一侧的整个表面上，并且在第二透明基板2的整个表面上形成无机光学多层膜4 在与凹凸部5相反的一侧上。形成光学多层膜4将进入第二透明基板2的400〜410nm的光的强度降低到进入第二透明基板2的光的强度的20％以下 光学多层膜。

    Precoding circuit and precoding-mulitplexing circuit for realizing very high transmission rate in optical fiber communication
    69.
    发明授权
    Precoding circuit and precoding-mulitplexing circuit for realizing very high transmission rate in optical fiber communication 有权
    用于在光纤通信中实现非常高的传输速率的预编码电路和预编码多路复用电路

    公开(公告)号：US06934308B1

    公开(公告)日：2005-08-23

    申请号：US09496974

    申请日：2000-02-02

    申请人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Koichi Murata ,  Yutaka Miyamoto

    发明人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Koichi Murata ,  Yutaka Miyamoto

    IPC分类号： H04J14/08 ,  H04J3/00 ,  H04J3/04 ,  H04L25/02 ,  H04L25/497 ,  G06F11/10

    CPC分类号： H04L25/497

    摘要： A precoding-multiplexing circuit is formed by a precoding circuit for carrying out a precoding with respect to n sets of parallel input binary data signals having a bit rate equal to R/n, to obtain n sets of parallel precoded signals, and a time division multiplexer for time division multiplexing the parallel precoded signals obtained by the precoding circuit, in units of one bit, and outputting time division multiplexed output signal having a bit rate equal to R. In this configuration, the encoding is realized by processing electric signals before the time division multiplexing, so that it becomes possible for the preceding circuit to handle signals which are slower than the transmission rate, and therefore it becomes easier to realize the higher transmission rate.

    摘要翻译： 预编码复用电路由预编码电路形成，用于对具有等于R / n的比特率的n组并行输入二进制数据信号进行预编码，以获得n组并行预编码信号，以及时分 多路复用器，用于以一位为单位时分复用由预编码电路获得的并行预编码信号，并输出比特率等于R的时分复用输出信号。在该配置中，通过在 时分复用，使得前一电路可以处理比传输速率慢的信号，因此变得更容易实现更高的传输速率。