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    • 1. 发明授权
    • Reflection type diffraction grating
    • 反射型衍射光栅
    • US06839173B2
    • 2005-01-04
    • US09953219
    • 2001-09-17
    • Katsuhide ShimmoShinji KawamotoTerufusa KunisadaKenichi Nakama
    • Katsuhide ShimmoShinji KawamotoTerufusa KunisadaKenichi Nakama
    • G02B5/18
    • G02B5/1861
    • A reflection type diffraction grating according to the present invention has a structure in which a metal film as a first layer with reflectance not lower than 30% with respect to the wavelength of incident light and a transparent dielectric film as a second layer are laminated successively on the surface of the reflection type diffraction grating. With respect to the wavelength of incident light, the metal film has a refractive index selected to be not higher than 1.5 and an extinction coefficient selected to be not smaller than 6.0. The transparent dielectric film has a refractive index selected to be in a range of from 1.30 to 1.46, both inclusively, with respect to the wavelength of incident light and has an optical film thickness selected to be in a range of from 0.20λ to 0.38λ, both inclusively, when λ is the wavelength of incident light.
    • 根据本发明的反射型衍射光栅具有如下结构:将相对于入射光的波长的反射率不低于30%的第一层的金属膜和作为第二层的透明电介质膜依次层叠在 反射型衍射光栅的表面。 对于入射光的波长,金属膜的折射率选择为不高于1.5,消光系数选择为不小于6.0。 透明电介质膜的折射率选择在1.30至1.46的范围内,包括相对于入射光的波长,并且具有选择在0.20λ至0.38λ范围内的光学膜厚度 ,当λ是入射光的波长时,都包括在内。
    • 2. 发明授权
    • Waveguide type liquid-crystal optical switch
    • 波导型液晶光开关
    • US06904207B2
    • 2005-06-07
    • US10364370
    • 2003-02-12
    • Shinji KawamotoKenichi Nakama
    • Shinji KawamotoKenichi Nakama
    • G02B6/12G02F1/13G02F1/1333G02F1/313G02B6/10G02B6/35
    • G02F1/1326G02F1/3132
    • A waveguide type liquid-crystal optical switch including: an optical waveguide having a pair of first and second cores close to each other for switching an optical path between the pair of first and second cores; a third core made of nematic liquid crystal enclosed in between a pair of oriented films and oriented in a predetermined direction by the pair of oriented films, the third core being disposed in any one of a space covering the first and second cores in parallel with a plane containing optical axes of the first and second cores, a space sandwiched between the first and second cores and a space covering upper surfaces of the first and second cores so as to be laid over the first and second cores; a first electrode disposed on a surface of the third core opposite to the first and second cores so as to cover a gap portion between the first and second cores; second and third electrodes disposed as a pair, between which electrodes the first electrode is put, the second and third electrodes provided for orienting liquid crystal molecules in a direction perpendicular to the direction of orientation of the oriented films; and a clad for collectively surrounding the first, second and third cores and the first, second and third electrodes.
    • 一种波导型液晶光开关,包括:光波导,其具有彼此靠近的一对第一和第二芯,用于切换所述一对第一和第二芯之间的光路; 由向列型液晶构成的第三芯由一对取向膜包围并通过一对取向膜沿预定方向取向,第三芯设置在与第一芯和第二芯平行的空间中的任一个中 包含第一和第二芯的光轴的平面,夹在第一和第二芯之间的空间和覆盖第一和第二芯的上表面的空间,以便放置在第一和第二芯上; 第一电极,设置在与第一和第二芯相对的第三芯的表面上,以覆盖第一和第二芯之间的间隙部分; 设置成一对的第二和第三电极,放置第一电极的电极之间,设置用于使液晶分子沿与取向膜的取向方向垂直的方向取向的第二和第三电极; 以及用于集体地围绕第一,第二和第三芯以及第一,第二和第三电极的包层。
    • 10. 发明授权
    • Waveguide type liquid crystal optical switch
    • 波导型液晶光开关
    • US06763159B2
    • 2004-07-13
    • US10438877
    • 2003-05-16
    • Shinji Kawamoto
    • Shinji Kawamoto
    • G02B626
    • G02F1/1326G02F1/313G02F1/3132
    • The invention provides a waveguide type liquid crystal optical switch that includes first and second cores so as to form a space therebetween, in which an optical path is switched between the first and second cores; a third core provided apart from the first and second cores, into which nematic liquid crystal orientated by an orientation film along a predetermined direction is filled, the third core overlapping to the space formed between the first and second cores; a first electrode arranged on an opposite side of the first and second cores with respect to the third core so as to overlap to the space between the first and second cores, second and third electrodes arranged on both sides of the first electrode, for orienting liquid crystal molecules along a direction perpendicular to the orientation direction of the orientation film; and a cladding for incorporating the cores and the electrodes.
    • 本发明提供了一种波导型液晶光开关,其包括第一和第二芯以在其间形成空间,其中光路在第一和第二芯之间切换; 与第一芯和第二芯分开的第三芯,其中填充有沿着预定方向由取向膜取向的向列型液晶,第三芯与第一和第二芯之间形成的空间重叠; 相对于第三芯布置在第一和第二芯的相对侧上的第一电极,以便与第一和第二芯之间的空间重叠,布置在第一电极两侧的第二和第三电极用于定向液体 沿着与取向膜的取向方向垂直的方向的晶体分子; 以及用于结合芯和电极的包层。