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    • 6. 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。
    • 9. 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。