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热词
    • 9. 发明公开
    • Illumination device, projection device, and projection-type image display device
    • Beleuchtungsvorrichtung,Projektionsvorrichtung und Projektionsbildanzeigevorrichtung
    • EP2720089A2
    • 2014-04-16
    • EP13002139.7
    • 2011-09-08
    • DAI NIPPON PRINTING CO., LTD.
    • Kurashige, MakioIshida, KazutoshiTakanokura, TomoeOoyagi, Yasuyuki
    • G03H1/22G03H1/32G02B27/28G02B27/48G03B21/14G03B21/40G03B35/18
    • G03B21/14F21V9/14G02B5/0252G02B27/286G02B27/48G03B21/2033G03B21/2066G03B21/2073G03B21/208G03B21/40G03B35/18G03H1/0005G03H1/20G03H1/22G03H1/2286G03H1/32G03H2222/31G03H2222/36
    • An illumination device comprises: an optical element including a light diffusion element including a first zone and a second zone to change a traveling direction of an incident light beam; an irradiation device configured to irradiate the optical element with a coherent light beam such that the coherent light beam is allowed to scan the first zone and the second zone of the light diffusion element, and such that traveling directions of the coherent light beams incident on the respective positions of the first zone are changed by the light diffusion element so as to illuminate zones which overlap each other in at least a portion thereof with the coherent light beams, and traveling directions of the coherent light beams incident from the irradiation device on the respective positions of the second zone are changed by the light diffusion element so as to illuminate zones which overlap each other in at least the portion with the coherent light beams; and a polarization control unit provided on an optical path of the coherent light beams, the polarization control unit being configured to control polarization of the coherent light beams such that a coherent light beam incident on the first zone of the light diffusion element to travel toward the designated illumination zone has a first polarization component and such that a coherent light beam incident on the second zone of the light diffusion element to travel toward the designated illumination zone has a second polarization component different from the first polarization component.
    • 照明装置包括:光学元件,包括具有第一区域和第二区域的光漫射元件,以改变入射光束的行进方向; 照射装置,被配置为用相干光束照射所述光学元件,使得所述相干光束被允许扫描所述光漫射元件的所述第一区域和所述第二区域,并且使得入射到所述光散射元件的相干光束的行进方向 通过光扩散元件改变第一区域的各个位置,以便在相干光束的至少一部分中彼此重叠的区域以及从照射装置入射的相干光束的行进方向 通过光扩散元件改变第二区域的位置,以便在至少部分相干光束照射相互重叠的区域; 以及设置在所述相干光束的光路上的偏振控制单元,所述偏振控制单元被配置为控制所述相干光束的偏振,使得入射在所述光漫射元件的所述第一区域上的相干光束朝向 指定的照明区域具有第一偏振分量,并且使得入射到光扩散元件的第二区域以朝向指定的照明区域行进的相干光束具有不同于第一偏振分量的第二偏振分量。