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    • 10. 发明授权
    • Imaging system having a liquid crystal element for selectively deflecting a beam path to vary the focal length thereof
    • 具有用于选择性地偏转光束路径以改变其焦距的液晶元件的成像系统
    • US08687165B2
    • 2014-04-01
    • US13579909
    • 2011-02-16
    • Lingli Wang
    • Lingli Wang
    • G02F1/13
    • G02F1/29G02F1/133371G02F2001/294
    • An imaging system for imaging an object onto an image sensor, and which has a front side facing the object and a rear side facing away from the object, the rear side being arranged behind the front side as viewed from the object. Furthermore, the imaging system has a light entrance device at the front side through which light coming from the object can enter into the imaging system. In this case, the light traverses the beam path between object and image sensor. At least one first and one second optical element are likewise present and are arranged at the rear side in such a way that they can influence the beam path. The light entrance device has an electrically switchable liquid crystal element which deflects the beam path at at least one first angle and a second angle which is different from the first angle depending on the electrical switching state. A discretely switchable focal length change is realized by this electrically effected change in the beam path.
    • 一种成像系统,用于将物体成像到图像传感器上,并且具有面向物体的前侧和背离物体的后侧,后侧从物体观察而配置在前侧的后方。 此外,成像系统在前侧具有光入射装置,来自物体的光可以通过该入射装置进入成像系统。 在这种情况下,光穿过物体和图像传感器之间的光束路径。 至少一个第一和第二光学元件同样存在并且被布置在后侧,使得它们可以影响光束路径。 光入射装置具有可电气切换的液晶元件,该液晶元件根据电开关状态以至少一个第一角度和与第一角度不同的第二角度偏转光束路径。 可以通过光束路径中的这种电效应的变化来实现可离散切换的焦距变化。