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    • 77. 发明申请
    • Video Projector Using Coherent Light Source
    • 视频投影机使用相干光源
    • US20080036921A1
    • 2008-02-14
    • US11667111
    • 2005-11-04
    • Toshifumi YokoyamaKazuhisa YamamotoHiroyuki Furuya
    • Toshifumi YokoyamaKazuhisa YamamotoHiroyuki Furuya
    • G02B6/00
    • G03B21/2033G03B21/145G03B21/16H04N9/3129H04N9/3144H04N9/315
    • In the video projector of the present invention, a fiber part (3b) of a fiber laser (3) is disposed so as to draw a circulating orbit of more than one circulation along the inner wall of the projector housing (1). Further, an FBG (14) which constitutes the fiber laser (3) is fixed so that its shape is not changed. Furthermore, a pump LD part (3a) of the fiber laser (3) is disposed apart from the SHG element (5). As a result, the video projector can be miniaturized, and thereby the portability and installment of the video projector are facilitated. Further, the output stabilization of the fiber laser can be realized by preventing the shape change of the FBG. Furthermore, by disposing the SHG element apart from the pump LD part which forms a heat source, the temperature change of the SHG element is suppressed and the wavelength conversion efficiency by the SHG element is enhanced.
    • 在本发明的视频投影仪中,设置光纤激光器(3)的光纤部(3b),沿着投影机壳体(1)的内壁拉出多于一个的循环的循环轨道。 此外,构成光纤激光器(3)的FBG(14)被固定成其形状不变化。 此外,光纤激光器(3)的泵LD部(3a)与SHG元件(5)分开设置。 结果,可以使视频投影仪小型化,从而便于投影机的便携性和安装。 此外,光纤激光器的输出稳定性可以通过防止FBG的形状变化来实现。 此外,通过将SHG元件与形成热源的泵LD部分分开,抑制SHG元件的温度变化,并且提高SHG元件的波长转换效率。
    • 79. 发明申请
    • Optical waveguide device
    • 光波导器件
    • US20060182400A1
    • 2006-08-17
    • US11331086
    • 2006-01-13
    • Hiroyuki FuruyaAkira Enokihara
    • Hiroyuki FuruyaAkira Enokihara
    • G02B6/10G02B6/42G02B6/26
    • B82Y20/00G02B6/1225
    • An optical waveguide device has: photonic crystal regions 305, each having holes 304 arranged in a periodic array; and an optical waveguide 302. Within the waveguide 302, high refractive index portions 303 are arranged along the waveguiding direction. Each of the high refractive index portions 303 is generally interposed between a pair of holes 304 which are in symmetric positions with respect to the center axis. The center of gravity of every high refractive index portion 303 is shifted along the waveguiding direction from a midpoint of a line interconnecting centers of the pair of holes 304, and is located between a position which is 0.45 r away from the midpoint in the waveguiding direction and a position which is 0.25 r away from the midpoint in the opposite direction, where r is a radius of each hole 304.
    • 光波导器件具有:光子晶体区域305,每个具有以周期性阵列排列的孔304; 和光波导302。 在波导302内,高折射率部分303沿着波导方向排列。 高折射率部分303中的每一个通常介于相对于中心轴线处于对称位置的一对孔304之间。 每个高折射率部分303的重心从一对孔304的相互连接的中心线的中点沿着波导方向移动,并且位于距波导方向的中点0.45r的位置之间 以及与相反方向的中点相距0.25r的位置,其中r是每个孔304的半径。