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    • 5. 发明授权
    • Solid-state image pickup device, imaging device, and dispersing element
    • 固态图像拾取装置,成像装置和分散元件
    • US08792027B2
    • 2014-07-29
    • US12985353
    • 2011-01-06
    • Michihiro YamagataYasuhiro TanakaKazuhiro YamadaKazuyoshi ItohYasuyuki Ozeki
    • Michihiro YamagataYasuhiro TanakaKazuhiro YamadaKazuyoshi ItohYasuyuki Ozeki
    • H04N9/04H04N5/225H01L27/00H04N9/097
    • H01L27/14629G02B5/18H01L27/14627
    • A solid-state image pickup device capable of taking more light into light receiving regions is provided. The solid-state image pickup device of the present invention includes: a photoelectric conversion unit having a plurality of light receiving regions that are two-dimensionally arrayed, the photoelectric conversion unit for photoelectrically converting light incident on each of the light receiving regions, and outputting an electric signal according to the intensity of the incident light; a lens unit comprising a plurality of converging lenses provided on an upper layer of the photoelectric conversion unit, each of the converging lens being provided corresponding to a set of continuous first to third light receiving regions; and a dispersing element provided between the photoelectric conversion unit and the lens unit, the dispersing element being formed of a medium whose refractive index varies periodically, and diffracting beams of a first wavelength band and of a third wavelength band, having been transmitted through the converging lens, and directing the beams onto the first light receiving region and the third light receiving region, and transmitting, without diffracting, a beam of a second wavelength band, having been transmitted through the converging lens, and directing the beam onto the second light receiving region.
    • 提供了能够将更多的光吸收到光接收区域的固体摄像装置。 本发明的固态摄像装置具有:具有二维排列的多个受光区域的光电转换单元,对各受光区域入射的光进行光电转换的光电转换单元,并输出 根据入射光强度的电信号; 透镜单元,包括设置在所述光电转换单元的上层上的多个会聚透镜,所述会聚透镜对应于一组连续的第一至第三光接收区域而设置; 以及设置在所述光电转换单元和所述透镜单元之间的分散元件,所述分散元件由折射率周期性变化的介质形成,并且衍射已经通过会聚的第一波长带和第三波长带的波束 并且将光束引导到第一光接收区域和第三光接收区域上,并且在不衍射的情况下传输已经透过会聚透镜的第二波长带的光束,并将光束引导到第二光接收 地区。
    • 6. 发明授权
    • Objective lens element and optical pickup device
    • 物镜和光学拾取装置
    • US08767518B2
    • 2014-07-01
    • US13248038
    • 2011-09-29
    • Katsuhiko HayashiYasuhiro TanakaMichihiro YamagataFumitomo Yamasaki
    • Katsuhiko HayashiYasuhiro TanakaMichihiro YamagataFumitomo Yamasaki
    • G11B7/12
    • G11B7/1353G11B7/1367G11B7/1374G11B7/13922G11B2007/0006
    • An objective lens element that can suppress occurrence of an aberration is disclosed. Sawtooth-like diffraction structures having different height and cycles (pitches) are provided on an inner part R21 and an outer part R22, respectively. A curved surface M211 extending at an intermediate level of recesses and projections of the sawtooth-like diffraction structure provided on the inner part R21, and a curved surface M212 extending at an intermediate level of recesses and projections of the sawtooth-like diffraction structure provided on the outer part R22 are smoothly connected to each other. Even when wavelength of the light source and/or the environmental temperature change, a phase shift does not occur between the inner part R21 and the outer part R22, and a decrease in diffraction efficiency and occurrence of an aberration can be suppressed.
    • 公开了能够抑制像差的发生的物镜元件。 分别具有不同高度和周期(间距)的锯齿状衍射结构分别设置在内部部分R21和外部部分R22上。 在内部部件R21上设置的锯齿状衍射结构的凹部和突起的中间水平面延伸的曲面M211,以及设置在上述锯齿状衍射结构的中间水平的锯齿状衍射结构的中间水平面的弯曲面M212 外部部件R22彼此平滑地连接。 即使在光源的波长和/或环境温度发生变化的情况下,内部部件R21和外部部件R22之间也不会发生相位偏移,并且可以抑制衍射效率的降低和像差的发生。
    • 8. 发明授权
    • Optical element and optical pickup device using the same
    • 光学元件和使用其的光学拾取器件
    • US08472299B2
    • 2013-06-25
    • US13411636
    • 2012-03-05
    • Katsuhiko HayashiYasuhiro TanakaMichihiro Yamagata
    • Katsuhiko HayashiYasuhiro TanakaMichihiro Yamagata
    • G11B7/00
    • G11B7/139G02B3/04G02B3/08G02B5/1814G11B7/1374
    • An optical element which has optical steps each providing a phase difference to transmitted light and has low light amount loss and a high efficiency is provided. The optical element includes a symmetry axis, a plurality of optically functional surfaces which are ring-shaped regions around the symmetry axis, and a plurality of wall regions connecting the optically functional surfaces to each other. The optically functional surfaces and the wall regions constitute the optical steps. On a cross-section taken by, as a cutting plane, a plane including the symmetry axis, the contour line of each wall region is substantially parallel to a light beam which is incident on the optically functional surface on the outer side and passes near the wall region. The maximum value of the angle between the symmetry axis and the light beam passing near the wall region is equal to or more than 25 degrees.
    • 提供一种光学元件,其具有对透射光提供相位差并具有低光损失和高效率的光学步骤。 光学元件包括对称轴,围绕对称轴的环形区域的多个光学功能表面和将光学功能表面彼此连接的多个壁区域。 光学功能表面和壁区域构成光学步骤。 在通过作为切割平面的包括对称轴的平面截取的横截面上,每个壁区域的轮廓线基本上平行于入射在外侧上的光学功能表面上的光束,并且靠近 墙区域。 对称轴与靠近壁区域的光束之间的角度的最大值等于或大于25度。