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    • 8. 发明授权
    • Projection lens unit
    • 投影镜头单元
    • US07612951B2
    • 2009-11-03
    • US11728120
    • 2007-03-23
    • Atsuo MasuiTokuji MatsudaKohei Wataru
    • Atsuo MasuiTokuji MatsudaKohei Wataru
    • G02B7/02
    • G02B7/028G02B7/023G02B13/22
    • A projection lens system 1A enlarges and projects onto a screen 8, via a plurality of lenses G1 to G16, image light emitted from, a light source 4 and modulated by DMDs 3r to 3b. A movable lens barrel 25 holds the lens G16, having positive power, which is positioned closest to the DMDs 3r to 3b. An outer tube 24 holds the movable lens barrel 25 to enable movement in the optical axis direction. Through thermal deformation at the time of an increase in temperature, the bimetal member 27 moves the movable lens barrel 25 in the optical axis direction so as to recede from the image formation devices which are the DMDs 3r to 3b.
    • 投影透镜系统1A经由多个透镜G1〜G16,从屏幕8放大并投射到从光源4发射并由DMD 3r〜3b调制的图像光。 可移动镜筒25保持具有正功率的透镜G16,其最靠近DMD 3r至3b定位。 外管24保持可动透镜镜筒25,以能够在光轴方向上移动。 通过在温度升高时的热变形,双金属构件27使可动镜筒25在光轴方向上移动,以便从作为DMD 3r至3b的图像形成装置后退。