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    Planar light illumination and imaging device with modulated coherent illumination that reduces speckle noise induced by coherent illumination
    4.
    发明申请
    Planar light illumination and imaging device with modulated coherent illumination that reduces speckle noise induced by coherent illumination 失效
    平面光照和具有调制相干照明的成像装置，可减少由相干照明引起的斑点噪声

    公开(公告)号：US20070138284A1

    公开(公告)日：2007-06-21

    申请号：US11603349

    申请日：2006-11-21

    申请人： Patrick Giordano ,  Stephen Colavito ,  Allan Wirth ,  William Svedas ,  Timothy Good ,  Andrew Jankevics ,  C. Knowles ,  Constantine Tsikos

    发明人： Patrick Giordano ,  Stephen Colavito ,  Allan Wirth ,  William Svedas ,  Timothy Good ,  Andrew Jankevics ,  C. Knowles ,  Constantine Tsikos

    IPC分类号： G06K7/10

    CPC分类号： G06K7/10 ,  H04N1/02865 ,  H04N1/03

    摘要： An imaging device including at least one imaging array and image formation optics that provide a field of view corresponding to the imaging array. At least one illumination module (which includes at least one source of coherent illumination) produces planar light illumination that substantially overlaps the field of view corresponding to the imaging array. Illumination control circuitry modulates the power level of illumination produced by the source of coherent illumination during each photo-integration time period of the imaging array to thereby reduce speckle noise in images captured by the imaging array. The illumination control circuitry preferably modulates the power level of illumination by controlling the number and/or duration of time periods corresponding to different power levels of illumination produced by the source of coherent illumination during each photo-integration time period of the imaging array. Moreover, the illumination control circuitry preferably controls number and/or duration of the time periods such that substantially constant energy is produced by the source of coherent illumination over the time periods (thereby enabling the different speckle patterns produced over the timer periods to optimally cancel each other out).

    摘要翻译： 一种成像装置，包括至少一个成像阵列和图像形成光学器件，其提供对应于成像阵列的视场。 至少一个照明模块（其包括至少一个相干照明源）产生基本上与对应于成像阵列的视野重叠的平面光照射。 照明控制电路在成像阵列的每个光积分时间段期间调制由相干照明源产生的照明的功率电平，从而减少由成像阵列捕获的图像中的斑点噪声。 照明控制电路优选地通过控制对应于在成像阵列的每个光合成时间段期间由相干照明源产生的不同功率电平的时间段的数量和/或持续时间来调制照明的功率电平。 此外，照明控制电路优选地控制时间段的数量和/或持续时间，使得在时间周期上由相干照明源产生基本上恒定的能量（从而使得在定时器周期上产生的不同散斑图案最佳地抵消每个 另外出来）。