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    • 6. 发明申请
    • OPTICAL PATH SWITCHING DEVICE AND METHOD
    • 光路切换装置及方法
    • WO2004027508A1
    • 2004-04-01
    • PCT/JP2003/011609
    • 2003-09-11
    • NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYDAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.UENO, IchiroHIRAGA, TakashiMIZOKURO, ToshikoYAMAMOTO, NoritakaMOCHIZUKI, HiroyukiTANAKA, Norio
    • UENO, IchiroHIRAGA, TakashiMIZOKURO, ToshikoYAMAMOTO, NoritakaMOCHIZUKI, HiroyukiTANAKA, Norio
    • G02F1/31
    • G02F1/293G02F1/0126G02F1/0147G02F3/00G02F2001/311
    • An optical path switching method according to the present invention comprises converging and irradiating, on a light absorption layer film provided in a thermal lens forming element (1, 2, 3) including at least the light absorption layer film, each of a control light (121, 122, 123) having a wavelength selected from a wavelength band which is absorbed by the light absorption layer film and a signal light (110, 111, 112) having a wavelength selected from a wavelength band which is not absorbed by the light absorption layer film. Arrangement of the light absorption layer film is adjusted such that at least the control light focuses within the light absorption layer film. A thermal lens is reversibly formed according to a distribution of refraction index created by a temperature increase generated in and around an area of the light absorption layer film in which the control light is absorbed, such that, according to whether or not the control light is irradiated, the converged signal light is output either as is in its converged form or after its spread angle is changed and a mirror (61, 62, 63) including a hole and reflecting means, the signal light output from the thermal lens forming element is either passed through the hole or reflected by the reflecting means to change the optical path.
    • 根据本发明的光路切换方法包括在设置在至少包括光吸收层膜的热透镜形成元件(1,2,3)中的光吸收层膜上会聚和照射每个控制光( 具有选自由光吸收层膜吸收的波长带的波长的波长的信号光(110,111,112)和具有选自不受光吸收的波长带的波长的信号光(110,111,112) 层膜。 调整光吸收层膜的配置,使得至少控制光聚焦在光吸收层膜内。 根据由控制光被吸收的光吸收层膜的区域内及周围产生的温度升高引起的折射率的分布,可逆地形成热透镜,使得根据控制光是否为 会聚信号光以其会聚形式或其扩展角度改变后输出,并且包括孔和反射装置的反射镜(61,62,63),从热透镜形成元件输出的信号光是 或者通过孔或被反射装置反射以改变光路。