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热词
    • 3. 发明授权
    • Method and device for position sensing of an optical component in an imaging system
    • 用于成像系统中的光学部件的位置感测的方法和装置
    • US07528354B2
    • 2009-05-05
    • US11447421
    • 2006-06-05
    • Jarkko Viinikanoja
    • Jarkko Viinikanoja
    • G02B27/40G02B27/64
    • G03B3/06G01S17/48G02B7/08G03B3/02G03B13/36
    • A light beam is used to illuminate a spot on a lens element which is shifted along the optical axis of an imaging system for auto-focus or optical zoom purposes. The light beam is arranged such that the reflected light beam from the lens element encounters a spot on the image sensor. The spot location on the image sensor is determined by a signal processor. As the lens element is shifted along the optical axis, the spot location changes accordingly. Based on the moving distance of the spot, the signal processor determines the shifting distance of the lens element and hence the position of the lens element. Based on the shifting distance of the lens element, a control module is used to adjust the lens position along the optical axis to achieve the desired focusing or zooming effects.
    • 光束用于照亮沿着成像系统的光轴移动的透镜元件上的光点,用于自动对焦或光学变焦目的。 光束被布置成使得来自透镜元件的反射光束遇到图像传感器上的斑点。 图像传感器上的光点位置由信号处理器确定。 当透镜元件沿着光轴移动时,光斑位置相应地改变。 基于点的移动距离,信号处理器确定透镜元件的移动距离,并因此确定透镜元件的位置。 基于透镜元件的移动距离,使用控制模块来调整沿着光轴的透镜位置,以实现期望的聚焦或缩放效果。